WO2020141534A1

WO2020141534A1 - Tools and methods for mounting, extracting and replacing removable dental sleeves

Info

Publication number: WO2020141534A1
Application number: PCT/IL2020/050010
Authority: WO
Inventors: Liat CEAUSU; Adir GADYUKOV
Original assignee: Implant B Ltd.
Priority date: 2019-01-06
Filing date: 2020-01-05
Publication date: 2020-07-09
Also published as: IL264114A

Abstract

The present invention relates to the field of dental tools, and, more particularly, to assemblies for mounting, extracting and replacing removable sleeves for dental implants.

Description

TOOLS AND METHODS FOR MOUNTING, EXTRACTING AND REPLACING

REMOVABLE DENTAL SLEEVES

FIELD OF THE INVENTION

BACKGROUND OF THE INVENTION

Dental implants are provided to replace lost teeth in the oral cavity. Dental implants, in conjunction with restorative complimentary parts, come together to form a structure that replaces a tooth providing both esthetic and functional purposes.

An implant-based restoration of a tooth generally includes a restoration to replace the crown portion of the lost tooth; the dental implant being provided in place of a lost tooth root. The crown and the dental implant are coupled with one another with an implant abutment. All three parts function together to bring about a successful implant-based treatment procedure. The implant serves as an anchor and provides the primary base and support structure of the dental restoration, and is therefore central to the success of the dental rehabilitation procedure.

The dental implant is generally provided as a screw-form anchor that generally includes a head portion and body portion. The head portion defines the coronal segment of the anchor that is provided for facilitating coupling with an abutment and crown. The body portion defines the apical segment of the anchor that is provided for integrating with the bone, a process known as osseointegration.

The implant body portion is generally designed according to parameters including the bone type to be implanted, and the location in which the implantation is to occur (implantation site). The body portion typically includes threading along a portion of its length that securely introduces the anchor into the bone and/or allows for the anchor to integrate with the bone.

In many cases, dental implant develop peri-implantitis over long term. In many cases the onset and development of peri-implantitis leads to the loss, removal and eventual replacement of the entire dental implant and its attached prosthetic restoration, therein requiring a second and costly re- implantation and dental rehabilitation process.

In order to overcome the above-mentioned problem, dental implants may be provided with a proximal surface configured to receive removable sleeves. WO 2015/14545 to the applicant of the present invention discloses a dental implant that has an anchor which remains fixed within bone, and proximal surface configured to receive a thin-walled removable sleeve thereon, such that if peri-implantitis is developed around the removable sleeve, the sleeved may be removed from the proximal surface and replaced by a new removable sleeve, without requiring full replacement of the implant and the prosthetic hardware it supports.

There is an unmet need for tools that will enable a practitioner to conveniently mount, extract or replace a removable sleeve, on or from a proximal surface of a dental implant.

SUMMARY OF THE INVENTION

The following embodiments and aspects thereof are described and illustrated in conjunction with systems, devices and methods which are meant to be exemplary and illustrative, not limiting in scope. In various embodiments, one or more of the above- described problems have been reduced or eliminated, while other embodiments are directed to other advantages or improvements.

According to some embodiments, there are provided devices, kits and methods for mounting, extracting and replacing a removable sleeve, on or from a proximal end of a dental implant. A mounting assembly, disclosed in the present specification, can be used to mount and attach a removable sleeve to a designated area configured for receiving such a sleeve on the dental implant. An extraction assembly disclosed in the present specification, can be used independently or in conjunction with a mounting assembly, whenever a replacement of a sleeve is required, such that the extraction assembly is used to extract an existing sleeve from the dental implant, thereby exposing a proximal end of the dental implant, configured to receive a new sleeve thereon. The mounting assembly can then be used to mount a new sleeve on the exposed proximal end of the dental implant.

Advantageously, a procedure utilizing the disclosed extraction and mounting assemblies enables a user, such as a practitioner, to replace a sleeve engaged with a proximal end of a dental implant, without requiring removal of the dental implant itself, thereby reducing costs and inconvenience for a patient that otherwise may be involved with re implantation and dental rehabilitation process.

According to one aspect, there is provided a sleeve extraction assembly comprising an extraction engagement member and an extraction driver, configured to be inserted through and engaged with the extraction engagement member. The extraction engagement member comprises a proximal extraction engagement segment having an extraction engagement segment bore with an extraction engagement bore thread and a plurality of extraction prongs extending from the proximal extraction engagement segment in a distal direction, wherein each prong comprises a prong lip. The extraction driver comprises an extraction driver head and an extraction shank having a threaded extraction driver portion.

According to some embodiments, the plurality of extraction prongs are provided with intrinsic flexibility, such that they can be flexed in the radial direction, the extraction engagement bore thread matches the screw thread of the threaded extraction driver portion, and the extraction driver is configured for free rotation relative to the extraction engagement member about a central axis when engaged therewith.

According to some embodiments, the sleeve extraction assembly further comprises a retaining ring configured to contact and surround at least a portion of the extraction engagement member, comprising a proximal retaining segment and a distal retaining segment, wherein inner diameter of the proximal retaining segment is larger than an inner diameter of the distal retaining segment, forming an inner retaining ring shoulder there between.

According to some embodiments, the extraction driver further comprises an unthreaded distal extraction shank portion having an extraction driver base surface.

According to some embodiments, the extraction driver further comprises an unthreaded proximal extraction shank portion.

According to some embodiments, the extraction driver further comprises an extraction driver head support, positioned between the extraction driver head and the extraction shank

According to some embodiments, the extraction engagement member further comprises a proximal extraction engagement head, positioned along a circumference of at least a portion of the proximal extraction engagement segment.

According to some embodiments, each prong lip is chamfered at its distal end. According to some embodiments, the extraction engagement member and the extraction driver are configured for coaxial alignment when engaged with one another.

According to some embodiments, the extraction engagement member further comprises an extraction prong shoulder at a proximal end of the plurality of extraction prongs, configured to abut against the inner retaining ring shoulder.

According to another aspect of the invention, there is provided a method for removing a removable sleeve from a dental implant, comprising the steps of:

(i) providing the sleeve extraction assembly according to any one of the aforementioned embodiments;

(ii) engaging the extraction engagement member with the removable sleeve, by sliding the plurality of extraction prongs over the removable sleeve until they snap-fit therewith;

(iii) engaging the extraction driver with the extraction engagement member by inserting the extraction driver through the extraction engagement segment bore, and rotating at least one of either the extraction driver or the extraction engagement member relative to each other;

(iv) propagating the extraction engagement member in the distal direction, by further rotating it relative to the extraction engagement member, until the extraction shank or a portion thereof, contacts a stopping feature of the dental implant, thereby prevented from further advancement in the distal direction; and

(v) applying further rotational movement between the extraction driver and the extraction engagement member, so as to facilitate displacement of the extraction engagement member, along with the removable sleeve attached thereto, in a proximal direction relative to the dental implant.

According to some embodiments, the method further comprises a step of exerting a manual pull force on sleeve extraction assembly, to disconnect between the removable sleeve and the dental implant.

According to yet another aspect of the invention, there is provided a sleeve mounting assembly, comprising a mounting engagement member and a mounting driver, configured to be inserted through and engaged with the mounting engagement member. The mounting engagement member comprises a proximal mounting engagement segment having a mounting engagement segment bore with a mounting engagement bore thread, and a plurality of mounting prongs extending from the proximal mounting engagement segment in a distal direction. The mounting driver comprises a mounting driver head portion; and a mounting shank having a threaded proximal mounting driver portion.

According to some embodiments, the plurality of mounting prongs are provided with intrinsic flexibility, such that they can be flexed in the radial direction, the mounting engagement bore thread matches the screw thread of the threaded proximal mounting driver portion, and the mounting driver is configured for free rotation relative to the mounting engagement member about a central axis when engaged therewith.

According to some embodiments, the mounting engagement member further comprises a distal mounting annular shoulder, formed at an intersection between the plurality of mounting prongs and the proximal mounting engagement segment.

According to some embodiments, the mounting driver further comprises a threaded distal mounting shank portion having a mounting driver base surface.

According to some embodiments, the proximal mounting engagement segment further comprises a mounting engagement member proximal edge, and wherein the mounting driver further comprises a stop feature configured to contact mounting engagement member proximal edge.

According to some embodiments, the stop feature is a mounting driver head support, positioned distal to the mounting driver head portion.

According to some embodiments, the stop feature is a proximal mounting shank push element, positioned proximal to the threaded proximal mounting driver portion.

According to some embodiments, the mounting engagement member further comprises a proximal mounting engagement head, positioned along a circumference of at least a portion of the proximal mounting engagement segment.

According to some embodiments, each of the plurality of mounting prongs further comprises a chamfered mounting prong distal portion.

According to yet another aspect of the invention, there is provided a method for mounting a removable sleeve on a dental implant, comprising the steps of:

(i) providing the sleeve mounting assembly according to any one of the aforementioned embodiments; (ii) engaging the mounting engagement member with the removable sleeve, by sliding the plurality of mounting prongs over the removable sleeve, such that they exert a retaining force sufficient to grasp and retain the removable sleeve there between;

(iii) engaging the mounting driver with the mounting engagement member by inserting the mounting driver through the proximal mounting engagement segment bore, and rotating at least one of either the mounting driver or the mounting engagement member relative to each other;

(iv) engaging the removable sleeve with an implant proximal surface of the dental implant, thereby facilitating attachment there between, by pushing the sleeve mounting assembly in a distal direction up to a sleeve grip position; and

(v) pulling the sleeve mounting assembly in a proximal direction, thereby disengaging it from the removable sleeve, while the removable sleeve remains attached to the implant proximal surface.

According to yet another aspect of the invention, there is provided a kit for extraction, mounting or replacement of removable sleeve, comprising the sleeve extraction assembly according to any one of the aforementioned embodiments, and the sleeve mounting assembly according to any one of the aforementioned embodiments.

According to some embodiments, the kit further comprises at least one removable sleeve, dimensioned to match the dimensions of the extraction engagement member and the mounting engagement member, such that it may be retained thereby.

According to some embodiments, the kit further comprises at least one dental implant, having an implant proximal surface dimensioned to match with and configured to attach to the at least one removable sleeve.

According to yet another aspect of the invention, there is provided a method for replacing an existing removable sleeve, attached to a dental implant, with a new removable sleeve, comprising the steps of:

(i) providing the kit according to any one of the aforementioned embodiments;

(ii) engaging the extraction engagement member with the existing removable sleeve, by sliding the plurality of extraction prongs over the existing removable sleeve until they snap-fit therewith; (iii) engaging the extraction driver with the extraction engagement member by inserting the extraction driver through the extraction engagement segment bore, and rotating at least one of either the extraction driver or the extraction engagement member relative to each other;

(iv) propagating the extraction engagement member in the distal direction, by further rotating it relative to the extraction engagement member, until the extraction shank or a portion thereof, contacts a stopping feature of the dental implant, thereby prevented from further advancement in the distal direction;

(v) applying further rotational movement between the extraction driver and the extraction engagement member, so as to facilitate displacement of the extraction engagement member, along with the existing removable sleeve attached thereto, in a proximal direction relative to the dental implant;

(vi) engaging the mounting engagement member with the new removable sleeve, by sliding the plurality of mounting prongs over the new removable sleeve, such that they exert a retaining force sufficient to grasp and retain the new removable sleeve there between;

(vii) engaging the mounting driver with the mounting engagement member by inserting the mounting driver through the proximal mounting engagement segment bore, and rotating at least one of either the mounting driver or the mounting engagement member relative to each other;

(viii) engaging the new removable sleeve with an implant proximal surface of the dental implant, thereby facilitating attachment there between, by pushing the sleeve mounting assembly in the distal direction up to a sleeve grip position; and

(ix) pulling the sleeve mounting assembly in the proximal direction, thereby disengaging it from the new removable sleeve, while the new removable sleeve remains attached to the implant proximal surface.

According to some embodiments, the method further comprises a step of exerting a manual pull force on sleeve extraction assembly, thereby disconnecting between the removable sleeve and the dental implant. Certain embodiments of the present invention may include some, all, or none of the above advantages. Further advantages may be readily apparent to those skilled in the art from the figures, descriptions, and claims included herein. Aspects and embodiments of the invention are further described in the specification herein below and in the appended claims.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of conflict, the patent specification, including definitions, governs. As used herein, the indefinite articles "a" and "an" mean "at least one" or "one or more" unless the context clearly dictates otherwise.

The following embodiments and aspects thereof are described and illustrated in conjunction with systems, tools and methods which are meant to be exemplary and illustrative, but not limiting in scope. In various embodiments, one or more of the above- described problems have been reduced or eliminated, while other embodiments are directed to other advantages or improvements.

BRIEF DESCRIPTION OF THE FIGURES

Some embodiments of the invention are described herein with reference to the accompanying figures. The description, together with the figures, makes apparent to a person having ordinary skill in the art how some embodiments may be practiced. The figures are for the purpose of illustrative description and no attempt is made to show structural details of an embodiment in more detail than is necessary for a fundamental understanding of the invention. For the sake of clarity, some objects depicted in the figures are not to scale.

In the Figures:

Figs. 1A-1B constitute exploded view in perspective and side view of a sleeve extraction assembly adjacent to a dental implant, respectively, according to some embodiments.

Figs. 2A-2B constitute a view in perspective and a side view of an extraction driver, respectively, according to some embodiments.

Fig. 2C constitutes a top view of the extraction driver, taken from direction 2C-2C of Fig. 2B. Fig. 2D constitutes a bottom view of the extraction driver, taken from direction 2D-

2D of Fig. 2B.

Figs. 3A-3B constitute a view in perspective and a side view of an extraction engagement member, respectively, according to some embodiments.

Fig. 3C constitutes a cross-sectional view of the extraction engagement member taken on line 3C-3C of Fig. 3B.

Fig. 3D constitutes a zoomed-in cut view of a radially extending prong lip of an extraction prong depicted in Fig. 3C, according to some embodiments.

Fig. 3E constitutes a bottom view of the extraction engagement member, taken from direction 3E-3E of Fig. 3B.

Figs. 4A-4B constitute a view in perspective and a side view of a retaining ring, respectively, according to some embodiments.

Fig. 4C constitutes a cross-sectional view of the retaining ring taken on line 4C-4C of Fig. 4B.

Figs. 5A-5S illustrate different steps of embodiments of a method of using the sleeve extraction assembly for removing a removable sleeve from a dental implant.

Figs. 6A-6B constitute exploded view in perspective and side view of a sleeve mounting assembly adjacent to a dental implant, respectively, according to some embodiments.

Figs. 7A-7B constitute a view in perspective and a side view of a mounting driver, respectively, according to some embodiments.

Fig. 7C constitutes a cross-sectional view of the mounting driver taken on line 7C-7C of Fig. 7B.

Fig. 7D constitutes a top view of the mounting driver, taken from direction 7D-7D of Fig. 7B.

Figs. 8A-8B constitute a view in perspective and a side view of a mounting engagement member, respectively, according to some embodiments.

Fig. 8C constitutes a cross-sectional view of the mounting engagement member taken on line 8C-8C of Fig. 8B. Fig. 8D constitutes a top view of the mounting driver, taken from direction 8D-8D of Fig. 8B.

Figs. 9A-9L illustrate different steps of embodiments of a method of using the sleeve mounting assembly for mounting a removable sleeve on a dental implant.

DETAILED DESCRIPTION OF SOME EMBODIMENTS

In the following description, various aspects of the disclosure will be described. For the purpose of explanation, specific configurations and details are set forth in order to provide a thorough understanding of the different aspects of the disclosure. However, it will also be apparent to one skilled in the art that the disclosure may be practiced without specific details being presented herein. Furthermore, well-known features may be omitted or simplified in order not to obscure the disclosure. In the figures, like reference numerals refer to like parts throughout.

Components having the same reference number followed by different lowercase letters may be collectively referred to by the reference number alone. If a particular set of components is being discussed, a reference number without a following lowercase letter may be used to refer to the corresponding component in the set being discussed. In order to avoid undue clutter from having too many reference numbers and lead lines on a particular drawing, some components will be introduced via one or more drawings and not explicitly identified in every subsequent drawing that contains that component.

Reference is now made to Figs. 1A-1B. Figs. 1A and IB constitute exploded view in perspective and side view, respectively, of a sleeve extraction assembly 100 adjacent to a dental implant 10, according to some embodiments. Sleeve extraction assembly 100 comprises an extraction engagement member 140 and an extraction driver 110 configured to be inserted through and engaged with extraction engagement member 140. Extraction engagement member 140 is configured to contact and engage a sleeve 50 of a dental implant 10.

According to some embodiments, sleeve extraction assembly 100 further comprises a retaining ring 180, configured to contact and surround at least a portion of extraction engagement member 140. It will be appreciated tough that according to some embodiments, sleeve extraction assembly 100 may be used for extracting sleeve 50 from dental implant 10 without any retaining ring 180. According to some embodiments, dental implant 10 comprises any dental implant know in the art, configured to receive and securely engage with a removable sleeve 50. According to some embodiments, dental implant 10 comprises an implant threaded core 12 for anchoring into a dental socket of a jawbone. Dental implant 10 further comprises an implant proximal surface 20 (shown, for example, in Figs. 5Q-6B), configured to receive removable sleeve 50 thereon. According to some embodiments, removable sleeve 50 is press- fitted on implant proximal surface 20. According to some embodiments, removable sleeve 50 is friction-fitted on implant proximal surface 20.

Reference is now made to Figs. 2A-2D. Figs. 2A and 2B constitute a view in perspective and a side view of extraction driver 110, respectively, according to some embodiments. Fig. 2C constitutes a top view of extraction driver 110, taken from direction 2C-2C of Fig. 2B. Fig. 2D constitutes a bottom view of extraction driver 110, taken from direction 2D-2D of Fig. 2B. Extraction driver 110 comprises an extraction driver head 120 and an extraction shank 130.

Extraction driver head 120 is formed to allow easy gripping by hand or by tool, for ease of rotation thereof. According to some embodiments, extraction driver head 120 is formed for engagement with an external rotation tool (tool not shown), such as a torque ratchet, a wrench or a screw driver.

According to some embodiments, extraction driver head 120 comprises a proximal extraction head surface 124 having a screw-head or a recess, adapted to fit with a rotation tool in the form of conventional or dedicated screwdrivers or wrenches. It will be understood by those skilled in the art that a shape of the screw-head or recess (not shown) may be implemented according to a wide variety of screw-drivers known in the art, such as, but not limited to, Phillips, Fearson, Allen, Slot, Square, Robertson, Torx, TA, Tri-Wing, Clutch, Spanner-Head, Double-Square, Triple-Square, Double-Hex, Bristol and the like.

According to some embodiments, extraction driver head 120 is formed as a vertical extension formed with facets (such as the exemplary hexagonal embodiments depicted in Figs. 2A-2D), adapted to fit rotation tools such as wrenches or torque ratchets.

The terms "example" and "exemplary" are used herein to mean "serving as an example, instance or illustration". Any embodiment described as an "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments and/or to exclude the incorporation of features from other embodiments. Extraction shank 130 comprises a threaded extraction driver portion 116. According to some embodiments, extraction shank further comprises an unthreaded distal extraction shank portion 112 having an extraction driver base surface 114. The diameter of distal extraction shank portion 112 is smaller than the diameter of threaded extraction driver portion

116.

According to some embodiments, distal extraction shank portion 112 is also threaded having a diameter smaller than the diameter of threaded extraction driver portion 116 (embodiments not shown). According to some embodiments, extraction shank 130 does not include a distal extraction shank portion 112, such that threaded extraction driver portion 116 end on its distal end with extraction driver base surface 114 (embodiments not shown).

According to some embodiments, extraction driver 110 further comprises an extraction driver head support 122, positioned between extraction driver head 120 and extraction shank 130.

According to some embodiments, extraction shank 130 further comprises an unthreaded proximal extraction shank portion 118. According to some embodiments, proximal extraction shank portion 118 is disposed between threaded extraction driver portion 116 and extraction driver head 120. According to some embodiments, proximal extraction shank portion 118 extends from threaded extraction driver portion 116 to extraction driver head support 122. According to some embodiments, proximal extraction shank portion 118 extends from threaded extraction driver portion 116 to extraction driver head 120.

Within the context of this application the term“distal” generally refers to the side or end of any device or a component of a device, which is closer to dental implant 10 when in use.

Within the context of this application the term“proximal” generally refers to the side or end of any device or a component of a device, which is opposite the“proximal end”, and is farther from dental implant 10 when in use.

Reference is now made to Figs. 3A-3E. Figs. 3A and 3B constitute a view in perspective and a side view of extraction engagement member 140, respectively, according to some embodiments. Fig. 3C constitutes a cross-sectional view of extraction engagement member 140, taken along line 3C-3C of Fig. 3B. Fig. 3D constitutes a zoomed in view of region 3D indicated in Fig. 3C. Fig. 3E constitutes a bottom view of extraction engagement member 140, taken from direction 3E-3E of Fig. 3B. Extraction engagement member 140 comprises proximal extraction engagement segment 142, and a plurality of extraction prongs 156 extending therefrom in the distal direction. Extraction prongs 156 are provided with intrinsic flexibility, such that they can be flexed in the radial direction. While Figs. 3A-3E depict an exemplary embodiment of an extraction engagement member 140 having four extraction prongs 156a, 156b, 156c and 156d, it will be clear that any other number of extraction prongs may be used.

The term "plurality", as used herein, means more than one.

According to some embodiments, extraction prongs 156 are equally spaced from one another along the circumference of extraction engagement member 140.

Proximal extraction engagement segment 142 comprises an extraction engagement segment bore 146, an extraction engagement member proximal edge 148, and a proximal extraction engagement outer surface 152. Extraction engagement segment bore 146 comprises an extraction engagement bore thread 150, extending along at least a portion of its length.

According to some embodiments, extraction engagement bore screw thread 150 extends along the entire length of extraction engagement segment bore 146 (embodiment not shown). According to some embodiments, extraction engagement bore screw-thread 150 partially extends along extraction engagement segment bore 146, leaving an unthreaded portion (not numbered) at a distal end thereof (see Fig. 3C). According to some embodiments, extraction engagement bore screw thread 150 partially extends along extraction engagement segment bore 146, leaving an unthreaded portion at a proximal end thereof (embodiment not shown).

Extraction engagement bore screw thread 150 matches the screw thread of threaded extraction driver portion 116, though the vertical length of extraction engagement bore screw thread 150 and threaded extraction driver portion 116 may differ.

According to some embodiments, extraction engagement member 140 further comprises a proximal extraction engagement head 144, positioned along the circumference of at least a portion of proximal extraction engagement segment 142. According to some embodiments, proximal extraction engagement head 144 is positioned along a proximal end of proximal extraction engagement segment 142 (see Figs. 3A-3B). According to some embodiments, extraction engagement head 144 is positioned along a middle region or distal end of proximal extraction engagement segment 142 (embodiments not shown). Proximal extraction engagement head 144 is configured to allow easy gripping by hand or by tool, for ease of rotation thereof or for holding it in place in order to prevent rotation thereof. According to some embodiments, proximal extraction engagement head 144 is formed for engagement with an external rotation- applying fastening and loosening tool, such as a torque ratchet, a wrench or a screw driver, used either to facilitate rotation or to prevent rotation thereof. According to some embodiments, proximal extraction engagement head 144 is formed for engagement with an external gripping tool, such as pliers, pincer or clamps, configured to grip it and prevent rotation movement thereof. It will be appreciated tough that according to some embodiments, extraction engagement member 140 may be formed without a proximal extraction engagement head 144.

Each extraction prong 156 comprises an extraction prong outer surface 158 and an extraction prong inner surface 160. The distal end of each extraction prong 156 preferably comprises a prong lip 162 extending radially inwards, having prong lip support surface 164 facing the proximal direction (see Fig. 3D).

The term“radially inwards”, as used herein, refers to an orientation towards a central axis 90 (centerline depicted, for example, in Fig. 5F). The term“radially outwards”, as used herein, refers to an orientation away from central axis 90.

According to some embodiments, extraction engagement member 140 further comprises extraction prong shoulder 166 at a proximal end of extraction prongs 156, extending radially inwards and facing distall y.

Reference is now made to Figs. 4A-4C. Figs. 4A and 4B constitute a view in perspective and a side view of retaining ring 180, respectively, according to some embodiments Fig. 4C constitutes a cross-sectional view of retaining ring 180, taken along line 4C-4C of Fig. 4B. Retaining ring 180 is formed as a circumferential ring or sleeve comprising two sections with differing diameters: a proximal retaining segment 182 and a distal retaining segment 190. More particularly, the inner diameter of distal retaining segment 190 is smaller than the inner diameter of proximal retaining segment 182.

Proximal retaining segment 182 comprises proximal retaining segment outer surface 184, proximal retaining segment inner surface 186, and retaining ring proximal edge 188. Distal retaining segment 190 comprises distal retaining segment outer surface 192, distal retaining segment inner surface 194 and retaining ring distal edge 196. The inner diameter of proximal retaining segment 182 is larger than the inner diameter of distal retaining segment 190, forming an inner retaining ring shoulder 198 between proximal retaining segment inner surface 186 and distal retaining segment inner surface 194.

Reference is now made to Figs. 5A-5R, showing different steps of embodiments of a method of using sleeve extraction assembly 100 for removing a removable sleeve 50 from a dental implant 10. Figs. 5A, 5B and 5C constitute an isometric view, a side view and a cross- sectional side view, respectively, of extraction engagement member 140 engaged with a removable sleeve 50. In the position shown in Figs. 5A-5C, removable sleeve 50 is attached to implant proximal surface 20, while extraction driver 110 is shown to be detached from extraction engagement member 140.

Retaining ring 180 is configured to encircle at least a portion of extraction engagement member 140, such that when extraction engagement member 140 passes there through, for example in a distal direction 82, it may advance until extraction prong shoulder 166 abuts inner retaining ring shoulder 198. At this position, proximal retaining segment inner surface 186 contacts at least a portion of proximal extraction engagement outer surface 152, and distal retaining segment inner surface 194 contacts at least a portion of extraction prongs' outer surface 158.

According to some embodiments, extraction prong shoulder 166 is configured to abut against inner retaining ring shoulder 198. According to some embodiments, extraction prong shoulder 166 is configured to abut against inner retaining ring shoulder 198 such that proximal extraction engagement head 144 is positioned proximal to retaining ring proximal edge 188, being accessible to an external tool to an operator’s hand.

According to some embodiments, at least one of: proximal retaining segment inner surface 186, distal retaining segment inner surface 194, proximal extraction engagement outer surface 152 or extraction prongs' outer surface 158, is configured to exert sufficient frictional force on an adjacent surface when in contact as disclosed throughout the specification, so as to prevent spontaneous sliding movement or disengagement between retaining ring 180 and extraction engagement member 140.

According to some embodiments, at least one of: proximal retaining segment inner surface 186, distal retaining segment inner surface 194, proximal extraction engagement outer surface 152 or extraction prongs' outer surface 158, is provided with surface features such as dimples, protrusions, surface roughness and the like, configured to be pressed against or act on an adjacent surface when in contact as disclosed herein above, so as to prevent spontaneous sliding movement or disengagement between retaining ring 180 and extraction engagement member 140 (embodiments not shown).

Extraction prongs 156 are dimensioned and configured for engagement with removable sleeve 50. According to some embodiments, extraction prongs 156 are configured to snap fit around sleeve 50 as will be described in detail below.

In use, as extraction engagement member 140 is pushed over removable sleeve 50 in the distal direction 82, extraction prongs 156 are flexed radially outwards and slide over removable sleeve 50. When extraction prongs' lips 162 pass over removable sleeve distal edge 54, extraction prongs 156 contract radially inwards such that if extraction engagement member 140 is pulled in the proximal direction 84 (direction 84 shown, for example, in Fig. 5R), proximal lip support surfaces 164 will contact and exert a pull force on removable sleeve distal edge 54 in the same direction. At this position, at least a portion of extraction prong inner surface 160 of each extraction prong 156 contacts or is pressed against removable sleeve 50.

According to some embodiments, extraction prongs 156 are designed and configured to act like pincers that open slightly to engage sleeve 50 and then close again to grasp sleeve 50 between them.

According to some embodiments, extraction prongs 156 are dimensioned such that extraction prong lips 162 may contact first and slide over sleeve proximal recesses 52, further expanding during a portion of their movement in the distal direction 82.

According to some embodiments, each prong lip 162 is chamfered or is formed with an angled surfaced at its distal end (see Fig. 3D), configured to promote a sliding movement of extraction prong 156 radially outwards, when pressed against a counterpart surface in the distal direction, such as removable sleeve distal edge 54.

According to some embodiments, extraction prongs 152 are configured to snap fit around sleeve 50 having recesses formed around its circumference, matching the locations of extraction prong lips 162, such that each extraction prong lip 162 is configured to snap into a matching recess (embodiments not shown).

Advantageously, retaining ring 180, when encircling a portion of extraction prongs' outer surfaces 158, prevents or limits the ability of extraction prongs 156 to further expand radially outwards, thereby keeping them engaged with removable sleeve 50 at least until it is removed from dental implant 10 or until retaining ring 180 is disengaged from extraction engagement member 140.

Figs. 5D, 5E and 5F constitute an isometric view, a side view and a cross-sectional side view, respectively, of extraction driver 110 engaged with extraction engagement member 140, while extraction engagement member 140 and retaining ring 180 are depicted in the same position shown in Figs. 5A-5C.

Extraction shank 130 of extraction driver 110 is configured for free rotation relative to extraction engagement member 140 about central axis 90. Rotation of extraction driver 110 in a predefined direction, either clockwise or counter-clockwise, is operative to cause a linear translation of extraction shank 130 in the distal direction 82.

According to some embodiments, extraction driver 110 is coaxial with extraction engagement member 140 when engaged therewith, such that both share the same central axis 90. According to some embodiments, retaining ring 180 is coaxial with extraction engagement member 140 when engaged therewith, such that both share the same central axis 90. According to some embodiments, extraction driver 110, extraction engagement member 140, retaining ring 180, removable sleeve 50 and dental implant 10 are all coaxial when engaged together, such that all share the same central axis 90 (see Fig. 5F).

The thread of threaded extraction driver portion 116 is configured to match extraction engagement bore thread 150, such that when extraction driver 110 is inserted through extraction engagement segment bore 146, is can propagate in the distal direction 82 by rotating extraction driver 110 relative to extraction engagement member 140 about central axis 90. Distal extraction shank portion 112 is configured to contact a stopping feature of dental implant 10, prevented thereby from further propagation in the distal direction 82. According to some embodiments, extraction driver base surface 114 is configured to contact the stopping feature of dental implant 10, prevented thereby from further propagation in the distal direction 82.

According to some embodiments, dental implant 10 comprises a threaded implant recess portion 14 and an implant recess proximal portion 16, wherein the diameter of threaded implant recess portion 14 is smaller than the diameter of implant recess proximal portion 16, so as to define an implant recess shoulder 18 there between.

According to some embodiments, distal extraction shank portion 112 is dimensioned to be accommodated by and inserted into implant recess proximal portion 16, but not into threaded implant recess portion 14, i.e. distal extraction shank portion 112 is configured to be advanced through implant recess proximal portion 16 up until it abuts against and is stopped by implant recess shoulder 18. In such embodiments, the stopping feature of dental implant 10 is implant recess shoulder 18.

In the embodiments depicted in Figs. 5D-5F, extraction driver 110 is shown in a position such that it is engaged with extraction engagement member 140 and distal extraction shank portion 112 is partially inserted into implant recess proximal portion 16, yet extraction driver base surface 114 is distanced away from implant recess shoulder 18.

According to some embodiments, the vertical lengths of threaded extraction driver portion 116 and extraction engagement bore thread 150 are configured to allow displacement of extraction driver 110 in the distal direction 82 when engaged with extraction engagement member 140 and when extraction engagement member 140 is engaged with a removable sleeve 50, at least until extraction driver base surface 114 contacts and abuts against the stopping feature of dental implant 10.

According to some embodiments, the vertical lengths of threaded extraction driver portion 116 and extraction engagement bore thread 150 are configured to allow advancement of extraction driver 110 in the distal direction 82 when engaged with extraction engagement member 140, and when extraction engagement member 140 is engaged with a removable sleeve 50, at least until extraction driver base surface 114 contacts and abuts implant recess shoulder 18.

The term 'vertical', as used herein, refers to a direction along or parallel to central axis

90.

According to some embodiments, rotation of extraction driver 110 about central axis 90, relative to extraction engagement member 140, is facilitated by rotating extraction driver head 120. According to some embodiments, rotation of extraction driver 110 about central axis 90, relative to extraction engagement member 140, is facilitated by rotating extraction driver head 120 using an external rotation tool, such as a torque ratchet, a wrench or a screw driver.

Advantageously, gripping proximal extraction engagement head 144 in order to prevent rotation thereof, while rotating extraction driver head 120, prevents simultaneous co rotation of extraction engagement member 140 along with extraction driver 110 during rotation thereof. Figs. 5G, 5H and 51 constitute an isometric view, a side view and a cross-sectional side view, respectively, of extraction drive 110 further advanced in the distal direction 82 relative to its position in in Figs. 5D-5F, up to a point where extraction driver base surface 114 first contacts and abuts implant recess shoulder 18, thereby preventing further advancement of extraction drive 110 relative to dental implant 20 in the distal direction 82.

Figs. 5J, 5K and 5L constitute an isometric view, a side view and a cross-sectional side view, respectively, of extraction engagement member 140 displaced in the proximal direction 84 relative to Figs. 5G-5I, while extraction driver base surface 114 is kept in contact with implant recess shoulder 18 as demonstrated in Figs. 5G-5I.

After distal extraction shank portion 112 first contacts the stopping feature of dental implant 10, for example, extraction driver base surface 114 contacting implant recess shoulder 18 as depicted in Figs. 5G-5I, further rotational movement of extraction engagement member 140 relative to extraction driver 110, or alternatively, rotational movement of extraction driver 110 relative to extraction engagement member 140, results in vertical movement of extraction engagement member 140 in the proximal direction 84.

According to some embodiments, further rotational movement of extraction engagement member 140 relative to extraction driver 110 is facilitated by keeping extraction driver 110 stationary while rotating extraction engagement member 140. According to some embodiments, extraction driver 110 is kept stationary by gripping extraction driver head 120 to prevent rotational movement thereof.

According to some embodiments, extraction driver 110 is kept stationary by gripping extraction driver head 120 with an external tool, such as such as a torque ratchet, a wrench, a screw driver, pliers, pincer or clamps, used to prevent rotational movement thereof. According to some embodiments, rotation of extraction engagement member 140 about central axis 90, relative to extraction driver 110, is facilitated by rotating proximal extraction engagement head 144.

According to some embodiments, rotation of extraction engagement member 140 about central axis 90, relative to extraction driver 110, is facilitated by rotating proximal extraction engagement head 144 using an external rotation tool, such as a torque ratchet or a wrench.

Advantageously, a sleeve extraction assembly 100 having both the extraction driver 110 comprising a extraction driver head 120, and the extraction engagement member 140 comprising a proximal extraction engagement head 144, allows a user of sleeve extraction assembly 100 to switch between options of rotating either extraction driver 110 or extraction engagement member 140 during the operation of, or alternatively during different phases of operating, sleeve extraction assembly 100.

While extraction engagement member 140 moves in the proximal direction 84 as depicted in Figs. 5J-5L, prong lips 162, potentially via prong lip support surfaces 164, exert pull force in the proximal direction 84, pulling removable sleeve 50 there along.

According to some embodiments, at least two of the parameters: the engagement between threaded extraction driver portion 116 and extraction engagement bore thread 150, the geometry of extraction driver head 120, the geometry of proximal extraction engagement head 144, the rigidity or flexibility of extraction prongs 156 and the dimensions of retaining ring 180, are configured to exert a pull force acting on removable sleeve 50 during displacement of extraction engagement member 140 in the proximal direction 84, which is sufficient to overcome the forces by which removable sleeve 50 is attached to dental implant 10, such as friction forces.

Figs. 5M, 5N and 50 constitute an isometric view, a side view and a cross-sectional side view, respectively, of extraction engagement member 140 further displaced in the proximal direction 84 relative to its position in Figs. 5J-5L, up until it contacts extraction driver head support 122, thereby prevented from moving further in the proximal direction 84 relative to extraction driver 110.

According to some embodiments, extraction driver 110 does not include an extraction driver head support 122, and extraction engagement member 140 directly contacts extraction driver head 120, which similarly prevents further movement thereof in the proximal direction 84 relative to extraction driver 110.

Displacement of extraction engagement member 140 up to contact with either extraction driver head support 122 (as depicted in Figs. 5M-50) or extraction driver head 120, results in further displacement of removable sleeve 50 relative to its position in Figs. 5J- 5L.

Figs. 5P, 5Q and 5R constitute an isometric view, a side view and a cross-sectional side view, respectively, of sleeve extraction assembly 100, carrying removable sleeve 50, completely disengaged from dental implant 10. According to some embodiments, when extraction engagement member 140 reaches either extraction driver head support 122 or extraction driver head 120 and is blocked from further displacement in the proximal direction 84 relative to extraction drive 110, a portion of removable sleeve is still in contact with implant proximal surface 20 (see Figs. 5M-50). In such embodiments, the contact area between removable sleeve 50 and implant proximal surface 20 at this position is sufficiently small, that a manual pull force, either by hand or with the assistance of an external tool, such as pliers or clams, can disconnect removable sleeve 50 from dental implant 10 (as is depicted in Figs. 5P-5R).

According to some embodiments, the vertical lengths of threaded extraction driver portion 116 and extraction engagement bore thread 150 are configured such that when extraction engagement member 140 reaches either extraction driver head support 122 or extraction driver head 120, the contact area between removable sleeve 50 and implant proximal surface 20 is sufficiently small so that a manual pull force can disconnect removable sleeve 50 from dental implant 10.

According to some embodiments, the length of proximal extraction shank portion 118 is configured such that when extraction engagement member 140 reaches either extraction driver head support 122 or extraction driver head 120, the contact area between removable sleeve 50 and implant proximal surface 20 is sufficiently small so that a manual pull force can disconnect removable sleeve 50 from dental implant 10.

According to some embodiments, the vertical lengths of threaded extraction driver portion 116 and extraction engagement bore thread 150 are configured such that sleeve extraction assembly 100, carrying removable sleeve 50, is completely disengaged from dental implant 10 before extraction engagement member 140 reaches either extraction driver head support 122 or extraction driver head 120 (embodiments not shown).

According to some embodiments, the length of proximal extraction shank portion 118 is configured such that sleeve extraction assembly 100, carrying removable sleeve 50, is completely disengaged from dental implant 10 before extraction engagement member 140 reaches either extraction driver head support 122 or extraction driver head 120 (embodiments not shown).

According to some embodiments, the vertical lengths of extraction threaded driver portion 116 and extraction engagement bore thread 150 are configured such that the contact area between removable sleeve 50 and implant proximal surface 20 is sufficiently small so that a manual pull force, either by hand or with the assistance of an external tool can disconnect removable sleeve 50 from dental implant 10 before extraction engagement member 140 reaches either extraction driver head support 122 or extraction driver head 120 (embodiments not shown).

According to some embodiments, the length of proximal extraction shank portion 118 is configured such that the contact area between removable sleeve 50 and implant proximal surface 20 is sufficiently small so that a manual pull force, either by hand or with the assistance of an external tool can disconnect removable sleeve 50 from dental implant 10 before extraction engagement member 140 reaches either extraction driver head support 122 or extraction driver head 120 (embodiments not shown).

Figs. 5P-5R depict dental implant 10 having removable sleeve 50 removed therefrom, wherein implant proximal surface 20 is completely exposed, potentially for placement of a new removable sleeve thereon.

According to some embodiments, distal extraction shank portion 112 is dimensioned to be accommodated by and inserted further into implant recess proximal portion 14, i.e. distal extraction shank portion 112 is configured to be advance through implant recess proximal portion 14 up until it abuts and is stopped a bottom thereof (not numbered). In such embodiments, the stopping feature of dental implant 10 is the bottom of implant recess proximal portion 14 (embodiments not shown).

According to some embodiments, when extraction driver 110 does not include a distal extraction shank portion 112, a distal portion of threaded extraction driver portion 116 is dimensioned to be accommodated by and inserted further into implant recess proximal portion 14, up until it abuts and is stopped a bottom thereof (embodiments not shown).

According to some embodiments, distal extraction shank portion 112 is dimensioned to be wider than implant recess proximal portion 16, such that it cannot penetrate there though, i.e. distal extraction shank portion 112 is configured to abut against the top surface (not numbered) of dental implant 10 (embodiments not shown). In this embodiment, the stopping feature of dental implant 10 is the top surface of dental implant 10.

According to some embodiments, when extraction driver 110 does not include a distal extraction shank portion 112, a distal portion of threaded extraction driver portion 116 is dimensioned to be wider than implant recess proximal portion 16, such that it cannot penetrate there though, i.e. distal extraction shank portion 112 is configured to abut against the top surface of dental implant 10 (embodiments not shown).

According to some embodiments, distal extraction shank portion 112 comprises a protrusion extending in the radial direction therefrom, at a selected position along its vertical length, wherein the protrusion is configured to abut against the stopping feature of dental implant 10 instead of extraction driver base surface 114 (embodiments not shown).

According to some embodiments, when extraction driver 110 does not include a distal extraction shank portion 112, a distal portion of threaded extraction driver portion 116 comprises a protrusion extending in the radial direction therefrom, at a selected position along its vertical length, wherein the protrusion is configured to abut against the stopping feature of dental implant 10 instead of extraction driver base surface 114 (embodiments not shown).

According to some embodiments, distal extraction shank portion 112 may comprise a protrusion in the form of a circumferential ring extending radially therefrom at a height proximal to extraction driver base surface 114, such that the portion of distal extraction shank portion 112 distal to the circumferential ring is configured for insertion into implant recess proximal portion 16 up until the circumferential ring, being wider in diameter than implant recess proximal portion 16, abuts against the top surface of dental implant 10, thereby preventing further movement of extraction drive 110 in the distal direction 82.

According to some embodiments, when extraction driver 110 does not include a distal extraction shank portion 112, a distal portion of threaded extraction driver portion 116 may comprise a protrusion in the form of a circumferential ring extending radially therefrom at a height proximal to extraction driver base surface 114, such that the portion of distal extraction shank portion 112 distal to the circumferential ring is configured for insertion into implant recess proximal portion 16 up until the circumferential ring, being wider in diameter than implant recess proximal portion 16, abuts against the top surface of dental implant 10, thereby preventing further movement of extraction drive 110 in the distal direction 82 (embodiments not shown).

According to some embodiments, extraction driver 110 is radially symmetric around central axis 90 so it does not need to be positioned in a particular orientation in order to engage with either extraction engagement member 140 or dental implant 20. According to some embodiments, extraction engagement member 140 is radially symmetric around central axis 90 so it does not need to be positioned in a particular orientation in order to engage with either retaining ring 180 or sleeve 50.

According to some embodiments, extraction driver 110 and extraction engagement member 140 are configured for coaxial alignment when engaged with one another. According to some embodiments, extraction driver 110, extraction engagement member 140 and retaining ring 180 are configured for coaxial alignment when engaged with one another.

According to some embodiments, there is provided a method for removing a removable sleeve 50 from a dental implant 10, using sleeve extraction assembly 100, comprising the steps of: (1) engaging extraction engagement member 140 with a removable sleeve 50 attached to a dental implant 10, by sliding the extraction prongs 156 of extraction engagement member 140 over removable sleeve 50 until they snap-fit therewith; (2) engaging extraction driver 110 with extraction engagement member 140 by inserting extraction driver 110 through extraction engagement segment bore 146, and rotating at least one of either extraction driver 110 or extraction engagement member 140 relative to each other; (3) propagating extraction engagement member 140 in the distal direction 82, by further rotating it relative to extraction engagement member 140, until extraction shank 130, or a portion thereof such as distal extraction shank portion 112, contacts a stopping feature of dental implant 10, thereby prevented from further advancement in the distal direction 82; and (4) applying further rotational movement between extraction driver 110 and extraction engagement member 140, so as to facilitate displacement of extraction engagement member 140, along with removable sleeve 50 attached thereto, in the proximal direction 84 relative to dental implant 10.

According to some embodiments, the order of steps (1) and (2) in the method for removing a removable sleeve 50 from a dental implant 10, is interchangeable.

According to some embodiments, step (4) of the method for removing a removable sleeve 50 from a dental implant 10 results in complete detachment of removable sleeve 50 from implant 10.

According to some embodiments, the method for removing a removable sleeve 50 from a dental implant 10 further comprises a step of exerting a manual pull force on sleeve extraction assembly 100, to disconnect between removable sleeve 50 and dental implant 10. According to some embodiments, the method for removing a removable sleeve 50 from a dental implant 10 further comprises a step of engaging a retaining ring 180 with extraction engagement member 140, such that retaining ring 180 encircle at least a portion thereof.

Reference is now made to Figs. 6A-6B. Figs. 6A and 6B constitute exploded view in perspective and side view, respectively, of a sleeve mounting assembly 200 adjacent to a dental implant 10, according to some embodiments. Sleeve mounting assembly 200 comprises a mounting engagement member 240 and a mounting driver 210 configured to be inserted through and engaged with mounting engagement member 240. Mounting engagement member 240 is configured to contact and push a sleeve 50 of a dental implant 10.

Reference is now made to Figs. 7A-7D. Figs. 7A and 7B constitute a view in perspective and a side view of mounting driver 210, respectively, according to some embodiments. Fig. 7C constitutes a cross-sectional view of mounting driver 210, taken along line 7C-7C of Fig. 7B. Fig. 7D constitutes a top view of mounting driver 210, taken from direction 7D-7D of Fig. 7B. Mounting driver 210 comprises a mounting driver head portion 220 and a mounting shank 130.

Mounting driver head portion 220 is formed to allow easy gripping by hand or by tool, for ease of rotation thereof. According to some embodiments, mounting driver head portion 220 is formed for engagement with an external rotation tool (tool not shown), such as a torque ratchet, a wrench or a screw driver.

According to some embodiments, mounting driver head portion 220 comprises a proximal mounting head surface 224 having a screw-head or a recess, adapted to fit with a rotation tool in the form of conventional or dedicated screwdrivers or wrenches. It will be understood by those skilled in the art that a shape of the screw-head or recess (not shown) may be implemented according to a wide variety of screw-drivers known in the art, such as, but not limited to, Phillips, Fearson, Allen, Slot, Square, Robertson, Torx, TA, Tri-Wing, Clutch, Spanner-Head, Double-Square, Triple-Square, Double-Hex, Bristol and the like.

According to some embodiments, mounting driver head portion 220 comprises a vertical extension formed with facets, adapted to fit rotation tools such as wrenches or torque ratchets. According to some embodiments, mounting driver head portion 220 comprises a circumferential slot (not numbered), separating between two regions of a vertical extension formed with facets (see for example Figs. 7A-7C). Mounting shank 230 comprises a threaded proximal mounting driver portion 216. According to some embodiments, mounting shank 230 further comprises a threaded distal mounting shank portion 212 having a mounting driver base surface 214. According to some embodiments, the diameter of threaded distal mounting shank portion 212 is smaller than the diameter of threaded proximal mounting driver portion 216.

According to some embodiments, mounting driver 210 further comprises mounting driver head support 222, positioned distal to mounting driver head portion 220. Mounting driver head support 222 comprises a mounting support base surface 226 facing the distal end of mounting driver 210.

According to some embodiments, mounting driver 210 further comprises proximal mounting shank push element 218, positioned proximal to threaded proximal mounting driver portion 216. Proximal mounting shank push element 218 comprises mounting push element base surface 228 facing the distal end of mounting driver 210.

According to some embodiments, mounting driver 210 is provided with both extraction driver head support 222 and proximal mounting shank push element 218, such that extraction driver head support 222 is positioned between mounting driver head portion 220 and proximal mounting shank push element 218, while proximal mounting shank push element 218 is positioned between extraction driver head support 222 and mounting shank 230.

According to some embodiments, mounting driver 210 is provided with extraction driver head support 222 and without proximal mounting shank push element 218, such that extraction driver head support 222 is positioned between mounting proximal mounting driver head portion 220 and mounting shank 230.

According to some embodiments, mounting driver 210 is provided with proximal mounting shank push element 218 and without extraction driver head support 222, such that proximal mounting shank push element 218 is positioned between mounting proximal mounting driver head portion 220 and mounting shank 230.

According to some embodiments, mounting shank 230 further comprises an unthreaded mounting shank mid portion 232. According to some embodiments, mounting shank mid portion 232 is disposed between threaded proximal mounting driver portion 216 and threaded distal mounting shank portion 212. According to some embodiments, threaded proximal mounting driver portion 216 comprises a thread extending along at least a portion of its length. According to some embodiments, threaded proximal mounting driver portion 216 comprises a thread extending along its entire length.

According to some embodiments, threaded distal mounting shank portion 212 comprises a thread extending along at least a portion of its length. According to some embodiments, threaded distal mounting shank portion 212 comprises a thread extending along its entire length.

Reference is now made to Figs. 8C-8D. Figs. 8A and 8B constitute a view in perspective and a side view of mounting engagement member 240, respectively, according to some embodiments. Fig. 8C constitutes a cross-sectional view of mounting engagement member 240, taken along line 8C-8C of Fig. 8B. Fig. 8D constitutes a bottom view of mounting engagement member 240, taken from direction 8D-8D of Fig. 8B.

Mounting engagement member 240 comprises proximal mounting engagement segment 242, and a plurality of mounting prongs 256 extending therefrom in the distal direction. Mounting prongs 256 are provided with intrinsic flexibility, such that they can be flexed in the radial direction. While Figs. 8A-8D depict an exemplary embodiment of a mounting engagement member 240 having six extraction prongs 256a, 256b, 256c, 256d, 256e and 256f, it will be clear that any other number of mounting prongs may be used.

According to some embodiments, mounting prongs 256 are equally spaced from one another along the circumference of mounting engagement member 240.

Proximal mounting engagement segment 242 comprises a proximal mounting engagement segment bore 246, a mounting engagement member proximal edge 248, and a mounting engagement member outer surface 252. Proximal mounting engagement segment bore 246 comprises a mounting engagement bore thread 250, extending along at least a portion of its length.

According to some embodiments, mounting engagement bore thread 250 extends along the entire length of proximal mounting engagement member bore 246 (see Fig. 8C). According to some embodiments, mounting engagement bore thread 250 partially extends along proximal mounting engagement member bore 246, leaving an unthreaded portion at a distal end thereof (embodiment not shown). According to some embodiments, mounting engagement bore thread 250 partially extends along proximal mounting engagement member bore 246, leaving an unthreaded portion at a proximal end thereof (embodiment not shown).

Mounting engagement bore thread 250 matches the screw thread of threaded proximal mounting driver portion 216, though the vertical lengths of mounting engagement bore thread 250 and threaded proximal mounting driver portion 216 may differ.

According to some embodiments, mounting engagement member 240 further comprises an unthreaded distal mounting engagement member bore 254, positioned distal to, and continuous with, proximal mounting engagement member bore 246. According to some embodiments, the diameter of distal mounting engagement member bore 254 is larger than the diameter of proximal mounting engagement member bore 246, such that a proximal mounting annular shoulder 270 is formed at the transition there between.

According to some embodiments, mounting engagement member 240 further comprises a proximal mounting engagement head (not shown), positioned along a circumference of at least a portion of proximal mounting engagement segment 242.

According to some embodiments, the proximal mounting engagement head is positioned along a proximal end of proximal mounting engagement segment 242. According to some embodiments, the mounting engagement head is positioned along the middle or distal end of proximal mounting engagement segment 242.

The proximal mounting engagement head is configured to allow easy gripping by hand or by tool, for ease of rotation thereof or for holding it in place in order to prevent rotation thereof. According to some embodiments, the proximal mounting engagement head is formed for engagement with an external rotation- applying fastening and loosening tool, such as a torque ratchet, a wrench or a screw driver, used either to facilitate rotation or to prevent rotation thereof. According to some embodiments, the proximal mounting engagement head is formed for engagement with an external gripping tool, such as pliers, pincer or clamps, configured to grip it and prevent rotation movement thereof.

Each mounting prong 256 comprises a mounting prong outer surface 258 and a mounting prong inner surface 260. According to some embodiments, each mounting prong 256 further comprises a chamfered mounting prong distal portion 262, wherein the chamfer is continuous with mounting prong inner surface 260. According to some embodiments, a distal mounting annular shoulder 268 is formed at an intersection between mounting prongs 256 and proximal mounting engagement segment

242.

Reference is now made to Figs. 9A-9L, showing different steps of embodiments of a method of using sleeve mounting assembly 200 for mounting a removable sleeve 50 on a dental implant 10. Figs. 9A, 9B and 9C constitute an isometric view, a side view and a cross- sectional side view, respectively, of mounting driver 210 engaged with mounting engagement member 240, which in turn is engaged with a removable sleeve 50. In the position shown in Figs. 9A-9C, removable sleeve 50 is shown to be detached from implant proximal surface 20.

Mounting prongs 256 are dimensioned and configured for engagement with removable sleeve 50. According to some embodiments, mounting prongs 256 are configured to slide over and press against the circumference of sleeve 50 as will be described in detail below.

In use, as mounting engagement member 240 is pushed over removable sleeve 50 in the distal direction 82, mounting prongs 256 are flexed radially outwards and slide over removable sleeve 50. Advantageously, the chamfered mounting prong distal portions 262, when present, facilitate the sliding movement of mounting prongs 256 over the outer surface of removable sleeve 50.

According to some embodiments, distal mounting annular shoulder 268 is configured to abut against a proximal edge 56 (shown in Fig. 6B) of removable sleeve 50. When a proximal edge 56 (shown in Fig. 6B) of removable sleeve 50 contacts distal mounting annular shoulder 268, the movement of mounting engagement member 240 in the distal direction 82 relative to removable sleeve 50 halts. At this position, at least a portion of mounting prong inner surface 260 of each mounting prong 256 contacts or is radially pressed against removable sleeve 50. Mounting prongs 256 are designed and configured to act like pincers that open slightly to slide over removable sleeve 50, while exerting a retaining force sufficient to grasp and retain removable sleeve 50 between them. According to some embodiments, the retaining force includes at least one of: a gripping force in the radial direction and a friction force in the tangential direction.

Mounting shank 230 of mounting driver 210 is configured for free rotation relative to mounting engagement member 240 about central axis 90 (central axis 90 depicted, for example, in Fig. 9F). Rotation of mounting driver 210 in a predefined direction, either clockwise or counter-clockwise, is operative to cause a linear translation of mounting shank 230 in the distal direction 82.

According to some embodiments, mounting driver 210 is coaxial with mounting engagement member 240 when engaged therewith, such that both share the same central axis 90. According to some embodiments, mounting driver 210, mounting engagement member 240, removable sleeve 50 and dental implant 10 are all coaxial when engaged together, such that all share the same central axis 90 (see Fig. 9F).

The thread of threaded proximal mounting driver portion 216 is configured to match mounting engagement bore thread 250, such that when mounting driver 210 is inserted through proximal mounting engagement segment bore 246, it can propagate in the distal direction 82 by rotating mounting driver 210 relative to mounting engagement member 240 about central axis 90.

According to some embodiments, mounting driver 210 comprises a mounting driver stop feature, configured to contact mounting engagement member proximal edge 248 when mounting engagement member 240 is engaged with mounting driver 210. According to some embodiments, mounting push element base surface 228 serves as the mounting driver stop feature. According to some embodiments, mounting support base surface 226 serves as the mounting driver stop feature.

Mounting engagement member proximal edge 248 is configured to contact a mounting driver stop feature, such as mounting push element base surface 228 or mounting support base surface 226, prevented thereby further propagation of mounting engagement member 240 and mounting driver 210 towards each other.

According to some embodiments, the mounting driver stop feature can be formed as any structural feature configured to contact mounting engagement member proximal edge 248 when mounting engagement member 240 is engaged with mounting driver 210, thereby preventing further propagation of mounting engagement member 240 and mounting driver 210 towards each other.

According to some embodiments, the mounting driver stop feature is formed as a protrusion extending radially outwards from a specific location along threaded proximal mounting driver portion 216, or alternatively, located proximal to threaded proximal mounting driver portion 216 (embodiments not shown). According to some embodiments, the mounting driver stop feature is formed as a protrusion extending in the distal direction, towards mounting engagement member proximal edge 248, from proximal mounting shank push element 218 or from mounting driver head support 222 (embodiments not shown).

According to some embodiments, mounting prongs 256 are configured to exert sufficient force on removable sleeve 50 when engaged therewith, so as to prevent spontaneous disengagement there between, for example when removable sleeve 50 is not engaged yet with dental implant 10 (as depicted in Figs. 9A-9C). According to some embodiments, mounting prongs 256 are configured to exert sufficient force on removable sleeve 50 when engaged therewith, so as to prevent spontaneous disengagement there between also when sleeve extraction assembly 200 is moved in different directions in space, prior to engaging removable sleeve 50 with dental implant 10.

According to some embodiments, the force exerted by mounting prongs 256 on removable sleeve 50 when engaged therewith, includes a pressing force acting on removable sleeve 50 in the radial direction. According to some embodiments, the force exerted by mounting prongs 256 on removable sleeve 50 when engaged therewith, includes a frictional force acting on removable sleeve 50 in a tangential direction (i.e. tangent to the surface removable sleeve 50).

According to some embodiments, mounting prongs 256 are dimensioned to contact slide over, and/or press against, sleeve proximal recesses 52.

Figs. 9D, 9E and 9F constitute an isometric view, a side view and a cross-sectional side view, respectively, of removable sleeve 50, retained by mounting engagement member 240, placed on implant proximal surface 20 for attachment thereto, while mounting driver 210 remains in the same position shown in Figs. 9A-9C, relative to mounting engagement member 240.

In use, sleeve mounting assembly 200, retaining removable sleeve 50 via mounting engagement member 240, as depicted in Figs. 9A-9C, is pushed in the distal direction 82 such that removable sleeve 50 engages dental implant 10 by contacting implant proximal surface 20, as depicted in Figs. 9D-9F.

Figs. 9G, 9H and 91 constitute an isometric view, a side view and a cross-sectional side view, respectively, of removable sleeve 50, positioned further in the distal direction over implant proximal surface 20, relative to its position in Figs. 9D-9F, while all other components of sleeve mounting assembly 200 remain in the same position shown in Figs. 9D-9F, relative to each other and to removable sleeve 50.

Figs. 9G-9I depict further advancement of removable sleeve 50 in the distal direction 82, up to a sleeve grip position. Sleeve grip position, as used herein, refers to a position in which removable sleeve 50 is positioned over implant proximal surface 20 such that it may attach to implant proximal surface 20. According to some embodiments, removable sleeve 50 is press-fitted to implant proximal surface 20 of dental implant 10 at sleeve grip position. According to some embodiments, attachment between removable sleeve 50 and implant proximal surface 20 at sleeve grip position is facilitated by frictional forces acting there between, preventing a spontaneous detachment of removable sleeve 50 therefrom.

According to some embodiments, sleeve grip position is reached when removable sleeve 50 cannot be pushed further in the distal direction 82 over implant proximal surface 20, under reasonable manual push-force exerted by a user on sleeve mounting assembly 200 in the same direction.

Figs. 9J, 9K and 9L constitute an isometric view, a side view and a cross-sectional side view, respectively, of sleeve mounting assembly 200 detached from removable sleeve 50, while removable sleeve 50 remains attached to implant proximal surface 20.

In use, once removable sleeve 50 reaches sleeve grip position as depicted in Figs. 9G- 91, sleeve mounting assembly 200, including mounting driver 210 and mounting engagement member 240 engaged with each other, is pulled in the proximal direction 84, for example by manual pull force applied thereto by a user thereof, such that mounting engagement member 240 disengages from removable sleeve 50, while removable sleeve 50 remains attached to dental implant 10.

According to some embodiments, the force exerted by mounting prongs 256 on removable sleeve 50 when engaged therewith is lower than the force retaining removable sleeve 50 around implant proximal surface 20 in a sleeve grip position, such that a pull force acting on mounting engagement member 240 in the proximal direction 84 in this position is sufficient to detach mounting prongs 256 from removable sleeve 50, but is not sufficient to detach removable sleeve 50 from implant proximal surface 20.

According to some embodiments, there is provided a method for mounting a removable sleeve 50 on a dental implant 10, using sleeve mounting assembly 200, comprising the steps of: (1) engaging mounting engagement member 240 with a removable sleeve 50 detached from a dental implant 10, by sliding the mounting prongs 256 of mounting engagement member 240 over removable sleeve 50 such that mounting prongs 256 exert a retaining force sufficient to grasp and retain removable sleeve 50 there between; (2) engaging mounting driver 210 with mounting engagement member 240 by inserting mounting driver 210 through proximal mounting engagement segment bore 246, and rotating at least one of either mounting driver 210 or mounting engagement member 240 relative to each other; (3) engaging removable sleeve 50 with implant proximal surface 20, thereby facilitating attachment there between, by pushing sleeve mounting assembly 200 in the distal direction 82 up to a sleeve grip position; and (4) pulling sleeve mounting assembly 200 in the proximal direction 84, thereby disengaging it from removable sleeve 50, while removable sleeve 50 remains attached to implant proximal surface 20.

According to some embodiments, the order of steps (1) and (2) in the method for mounting a removable sleeve 50 on a dental implant 10 is interchangeable.

According to some embodiments, the method for mounting a removable sleeve 50 on a dental implant 10 further comprises a step of advancing mounting engagement member 240 in the distal direction 82 relative to removable sleeve 50, until a proximal edge of removable sleeve 50 contacts distal mounting annular shoulder 268.

According to some embodiments, the method for mounting a removable sleeve 50 on a dental implant 10 further comprises a step of advancing mounting driver 210 in the distal direction 82 relative to mounting engagement member 240, until mounting engagement member proximal edge 248 contacts a mounting driver stop feature of mounting driver 210.

According to some embodiments, there is provided a kit for extraction, mounting or replacement of removable sleeve 50, comprising a sleeve extraction assembly 100 and a sleeve mounting assembly 200.

According to some embodiments, the kit further comprises at least one removable sleeve 50, dimensioned to match the dimensions of extraction engagement member 140 and mounting engagement member 240, such that it may be retained thereby according to the embodiments disclosed in the current specification.

According to some embodiments, the kit further comprises at least one dental implant 10, having an implant proximal surface 20 dimensioned to match with and configured to attach to removable sleeve 50. According to some embodiments, there is provided a method for replacing an existing removable sleeve 50' , attached to a dental implant 10, with a new removable sleeve 50", using sleeve extraction assembly 100 and sleeve mounting assembly 200, comprising the steps of: (1) engaging extraction engagement member 140 with an existing removable sleeve 50' attached to a dental implant 10, by sliding the extraction prongs 156 of extraction engagement member 140 over existing removable sleeve 50' until they snap-fit therewith; (2) engaging extraction driver 110 with extraction engagement member 140 by inserting engaging extraction driver 110 through extraction engagement segment bore 146, and rotating at least one of either engaging extraction driver 110 or extraction engagement member 140 relative to each other; (3) propagating extraction engagement member 140 in the distal direction 82, by further rotating it relative to extraction engagement member 140, until distal extraction shank portion 112 contact a stopping feature of dental implant 10, thereby prevented from further advancement in the distal direction 82; (4) applying further rotational movement between engaging extraction driver 110 and extraction engagement member 140, so as to facilitate displacement of extraction engagement member 140, along with existing removable sleeve 50' attached thereto, in the proximal direction 84 relative to dental implant 10, thereby disconnecting existing removable sleeve 50' from dental implant 10; (5) engaging mounting engagement member 240 with a new removable sleeve 50" detached from the dental implant 10, by sliding the mounting prongs 256 of mounting engagement member 240 over new removable sleeve 50" such that mounting prongs 256 exert a retaining force sufficient to grasp and retain removable sleeve 50" there between; (6) engaging mounting driver 210 with mounting engagement member 240 by inserting mounting driver 210 through proximal mounting engagement segment bore 246, and rotating at least one of either mounting driver 210 or mounting engagement member 240 relative to each other; (7) engaging new removable sleeve 50" with contacting implant proximal surface 20, thereby facilitating attachment there between, by pushing sleeve mounting assembly 200 in the distal direction 82 up to a sleeve grip position; and (8) pulling sleeve mounting assembly 200 in the proximal direction 84, thereby disengaging it from removable sleeve 50, which remains attached to implant proximal surface 20.

According to some embodiments, the order of steps (1) and (2) in the method for replacing an existing removable sleeve 50' with a new removable sleeve 50", is interchangeable. According to some embodiments, the order of steps (5) and (6) in the method for replacing an existing removable sleeve 50' with a new removable sleeve 50", is interchangeable.

According to some embodiments, the method for replacing an existing removable sleeve 50' with a new removable sleeve 50" further comprises a step of exerting a manual pull force on sleeve extraction assembly 100, to disconnect between removable sleeve 50 and dental implant 10.

According to some embodiments, the method for replacing an existing removable sleeve 50' with a new removable sleeve 50" further comprises a step of engaging a retaining ring 180 with extraction engagement member 140, such that retaining ring 180 encircle at least a portion thereof.

According to some embodiments, the method for replacing an existing removable sleeve 50' with a new removable sleeve 50" further comprises a step of advancing mounting engagement member 240 in the distal direction 82 relative to removable sleeve 50, until a proximal edge of removable sleeve 50 contacts distal mounting annular shoulder 268.

According to some embodiments, the method for replacing an existing removable sleeve 50' with a new removable sleeve 50" further comprises a step of advancing mounting driver 210 in the distal direction 82 relative to mounting engagement member 240, until mounting engagement member proximal edge 248 contacts a mounting driver stop feature of mounting driver 210.

It is appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable sub-combination or as suitable in any other described embodiment of the invention. No feature described in the context of an embodiment is to be considered an essential feature of that embodiment, unless explicitly specified as such.

Although the invention is described in conjunction with specific embodiments thereof, it is evident that numerous alternatives, modifications and variations that are apparent to those skilled in the art may exist. It is to be understood that the invention is not necessarily limited in its application to the details of construction and the arrangement of the components and/or methods set forth herein. Other embodiments may be practiced, and an embodiment may be carried out in various ways. Accordingly, the invention embraces all such alternatives, modifications and variations that fall within the scope of the appended claims.

Claims

1. A sleeve extraction assembly comprising:

(i) an extraction engagement member comprising:

a proximal extraction engagement segment having an extraction engagement segment bore with an extraction engagement bore thread; and

a plurality of extraction prongs extending from the proximal extraction engagement segment in a distal direction, wherein each prong comprises a prong lip;

(ii) an extraction driver, configured to be inserted through and engaged with the extraction engagement member, comprising:

an extraction driver head; and

an extraction shank having a threaded extraction driver portion; wherein the plurality of extraction prongs are provided with intrinsic flexibility, such that they can be flexed in the radial direction;

wherein the extraction engagement bore thread matches the screw thread of the threaded extraction driver portion; and

wherein the extraction driver is configured for free rotation relative to the extraction engagement member about a central axis when engaged therewith.

2. The sleeve extraction assembly of claim 1, further comprising a retaining ring configured to contact and surround at least a portion of the extraction engagement member, comprising a proximal retaining segment and a distal retaining segment, wherein inner diameter of the proximal retaining segment is larger than an inner diameter of the distal retaining segment, forming an inner retaining ring shoulder there between.

3. The sleeve extraction assembly according to any one of claims 1 or 2, wherein the extraction driver further comprises an unthreaded distal extraction shank portion having an extraction driver base surface.

4. The sleeve extraction assembly according to any one of claims 1 to 3, wherein the extraction driver further comprises an unthreaded proximal extraction shank portion.

5. The sleeve extraction assembly according to any one of claims 1 to 4, wherein the extraction driver further comprises an extraction driver head support, positioned between the extraction driver head and the extraction shank.

6. The sleeve extraction assembly according to any one of claims 1 to 5, wherein the extraction engagement member further comprises a proximal extraction engagement head, positioned along a circumference of at least a portion of the proximal extraction engagement segment.

7. The sleeve extraction assembly according to any one of claims 1 to 6, wherein each prong lip is chamfered at its distal end.

8. The sleeve extraction assembly according to any one of claims 1 to 7, wherein the extraction engagement member and the extraction driver are configured for coaxial alignment when engaged with one another.

9. The sleeve extraction assembly according to any one of claims 2 to 8, wherein the extraction engagement member further comprises an extraction prong shoulder at a proximal end of the plurality of extraction prongs, configured to abut against the inner retaining ring shoulder.

10. A method for removing a removable sleeve from a dental implant:

(i) providing the sleeve extraction assembly according to any one of claims 1 to 9;

(iii) engaging the extraction driver with the extraction engagement member by inserting the extraction driver through the extraction engagement segment bore, and rotating at least one of either the extraction driver or the extraction engagement member relative to each other; (iv) propagating the extraction engagement member in the distal direction, by further rotating it relative to the extraction engagement member, until the extraction shank or a portion thereof, contacts a stopping feature of the dental implant, thereby prevented from further advancement in the distal direction; and

11. The method according to claim 10, further comprising a step of exerting a manual pull force on sleeve extraction assembly, to disconnect between the removable sleeve and the dental implant.

12. A sleeve mounting assembly comprising:

(i) a mounting engagement member comprising:

a proximal mounting engagement segment having a mounting engagement segment bore with a mounting engagement bore thread; a plurality of mounting prongs extending from the proximal mounting engagement segment in a distal direction;

(ii) a mounting driver, configured to be inserted through and engaged with the mounting engagement member, comprising:

a mounting driver head portion; and

a mounting shank having a threaded proximal mounting driver portion;

wherein the plurality of mounting prongs are provided with intrinsic flexibility, such that they can be flexed in the radial direction;

wherein the mounting engagement bore thread matches the screw thread of the threaded proximal mounting driver portion; and

wherein the mounting driver is configured for free rotation relative to the mounting engagement member about a central axis when engaged therewith.

13. The sleeve mounting assembly according to claim 12, wherein the mounting engagement member further comprises a distal mounting annular shoulder, formed at an intersection between the plurality of mounting prongs and the proximal mounting engagement segment.

14. The sleeve mounting assembly according to any one of claims 12 or 13, wherein the mounting driver further comprises a threaded distal mounting shank portion having a mounting driver base surface.

15. The sleeve mounting assembly according to any one of claims 12 to 14, wherein the proximal mounting engagement segment further comprises a mounting engagement member proximal edge, and wherein the mounting driver further comprises a stop feature configured to contact mounting engagement member proximal edge.

16. The sleeve mounting assembly according to claims 15, wherein the stop feature is a mounting driver head support, positioned distal to the mounting driver head portion.

17. The sleeve mounting assembly according to claims 15, wherein the stop feature is a proximal mounting shank push element, positioned proximal to the threaded proximal mounting driver portion.

18. The sleeve mounting assembly according to any one of claims 12 to 17, wherein the mounting engagement member further comprises a proximal mounting engagement head, positioned along a circumference of at least a portion of the proximal mounting engagement segment.

19. The sleeve mounting assembly according to any one of claims 12 to 18, wherein each of the plurality of mounting prongs further comprises a chamfered mounting prong distal portion.

20. A method for mounting a removable sleeve on a dental implant:

(i) providing the sleeve mounting assembly according to any one of claims 12 to 19;

(ii) engaging the mounting engagement member with the removable sleeve, by sliding the plurality of mounting prongs over the removable sleeve, such that they exert a retaining force sufficient to grasp and retain the removable sleeve there between;

21. A kit for extraction, mounting or replacement of removable sleeve,

comprising:

(i) the sleeve extraction assembly according to any one of claims 1 to 9; and

(ii) the sleeve mounting assembly according to any one of claims 12 to 19.

22. The kit according to claim 21, further comprising at least one removable sleeve, dimensioned to match the dimensions of the extraction engagement member and the mounting engagement member, such that it may be retained thereby.

23. The kit according to claim 22, further comprising at least one dental implant, having an implant proximal surface dimensioned to match with and configured to attach to the at least one removable sleeve.

24. A method for replacing an existing removable sleeve, attached to a dental implant, with a new removable sleeve:

(i) providing the kit according to any one of claims 21-23; (ii) engaging the extraction engagement member with the existing removable sleeve, by sliding the plurality of extraction prongs over the existing removable sleeve until they snap-fit therewith;

(viii) engaging the new removable sleeve with an implant proximal surface of the dental implant, thereby facilitating attachment there between, by pushing the sleeve mounting assembly in the distal direction up to a sleeve grip position; and (ix) pulling the sleeve mounting assembly in the proximal direction, thereby disengaging it from the new removable sleeve, while the new removable sleeve remains attached to the implant proximal surface.

25. The method according to claim 24, further comprising a step of exerting a manual pull force on sleeve extraction assembly, thereby disconnecting between the removable sleeve and the dental implant.