TWM477258U - Improved inter-vertebral fusion device and implant apparatus - Google Patents

Description

Improved interbody fusion cage and implant device

The present invention relates to an improved interbody cage and implant device, and more particularly to an interbody cage implantable between adjacent vertebrae and an implant device for performing an interbody fusion cage.

Spinal diseases are mostly caused by long-term posture errors, sports injuries or ageing. Many spinal lesions, such as spinal stenosis or intervertebral disc herniation, are often accompanied by severe sciatica when the disease occurs. Symptoms such as limp or neuropathy, especially when the posterior portion of an intervertebral disc is damaged, the extension of the spine causes the two vertebral bodies to separate from the disc and not close together normally, which results in nerves. The roots are trapped and cause a severe pain sensation, causing the patient to be troubled by the action.

Usually such spinal lesions cannot be cured with drugs, and a valid and validated method is surgical treatment. A Spinal Interbody Fusion Cage is implanted between the failed adjacent vertebrae to reconstruct the intervertebral height. Limiting the extension of the adjacent two vertebrae to an abnormally close to each other, eliminating the condition of compressing the nerves, so as to avoid adverse characteristics such as pain in the patient's action.

Because the nerve cage and the large blood vessel are usually covered near the installation site of the interbody fusion cage, in order to avoid damage to the tissue caused by the destruction of the tissue, in the clinical, the wound created will be as much as possible. Small, in order to effectively avoid nerve and large blood vessel tissue during the operation of surgery; therefore, minimally invasive surgery has been widely used in the treatment of vertebral lesions, because it has a small wound, which can greatly reduce the treatment site and nearby tissues. Destructive, gaining surgical safety.

However, in practical applications, in order to provide proper stability between the two vertebrae, the general interbody cage must be designed in accordance with the shape of the vertebrae of the installation site, for example, the shape of the peas or the meniscus. Shape, and its size can not be too small, for example, the length is more than 35mm, to avoid the collapse of the force part caused by insufficient force area; in order to smoothly install the intervertebral cage on the correct position and angle of the vertebrae, in the past, even With minimally invasive surgery, the wound is still required to be at least 5 cm for the relevant surgical instruments and the width of the implanted interbody cage to pass. Therefore, it is one of the subjects of the related art to provide an interbody cage structure and an implantation method thereof which can minimize the surgical wound.

In the prior art, for example, US Patent Publication No. US 2012/0209383 A1 "INTERVERTEBRAL CAGE AND IMPLANTING APPARATUS AND OPERATING METHOD THEREOF" (intervertebral cage and implant device and its operation method) The invention discloses an intervertebral cage and an implant device and a method for operating the same, and the interbody cage can be implanted between two adjacent vertebrae by minimally invasive surgery to reconstruct the intervertebral height, in particular The interbody cage includes a joint having a consistent opening on the side wall provided with a plurality of adjacently arranged inner arc surfaces; the implant device includes a sleeve and a front end having a snap post The rod body is axially stretched between the sleeve and the rod body, so that the engaging post can be selectively engaged or not engaged in the joint of the intervertebral cage joint, so that the implant device can be clamped Holding or releasing the interbody fusion cage; in turn, adjusting the engagement position of the different inner arc surfaces of the engagement post of the implant device and the interbody fusion cage to adjust the fusion of the implant device and the intervertebral body The clamping angle of the device; accordingly, during the interbody fusion device implantation procedure, the implant device clamps the interbody cage along the long axis direction so that the interbody cage can enter the installation site through the catheter from the smallest width portion. After entering the installation site, the interbody cage is rotated in a lateral direction by changing the different clamping positions between the implant device and the interbody cage to conform to the placement angle required for the installation site.

The foregoing solution can significantly reduce the wound compared with the conventional surgery, but it also has the problem of difficulty in operation, for example, when the implanted device holds or releases the interbody cage, it is necessary to rotate the engaging post and pass it through the interbody fusion. The small slot on the device can be engaged or disengaged from the joint of the joint, so it is difficult to operate, especially after the precise operation is completed to install the cage between the vertebrae. When the engaging column is separated from the small slot, the position of the intervertebral cage is inadvertently displaced, resulting in the repositioning of the interbody cage. In addition, during the operation, the implant device and the intervertebral fusion are to be adjusted. When the clamping angle of the device is required, the engaging column and the specific inner arc surface at different positions on the cross-port are required to be fitted, but when the angle is changed, the engaging column and the interbody cage of the implanting device are deeply located in the person. In the body, it is impossible to operate visually, and it can only be operated by touch and experience. The difficulty is extremely high, and the angle of the adjustable clamping according to the combined structure is not much, which limits the precision of the implantation operation.

In view of this, the main purpose of the present invention is to provide an improved interbody cage and implant device which is provided on the intervertebral cage by providing a jaw portion composed of two elastic clip arms in the implant device. The shaft column makes the operation of combining or separating the interbody cage and the implant device into a simple and rapid operation, and the use of the one-way tooth in the jaw portion and the shaft column enables the implant device and the interbody fusion cage to be combined. After that, it has an easy to change the implantation angle of the interbody cage and adjust the installation position. Advantages, therefore, this creation can improve the ease of implantation surgery and improve the safety and success rate of surgery.

In order to achieve the above creative purpose, the present invention provides an interbody fusion cage which can be implanted between adjacent vertebrae to reconstruct an intervertebral height. The main body of the interbody cage includes an upper pad and a lower pad. a gap is maintained between the backing plate and the lower backing plate, and is joined by a plurality of vertical portions into a cage shape; the outer shape of the body is in the shape of a pea or a crescent, and the longitudinal dimension of the main body is larger than the width dimension; The front end of the long central axis has a first-line type of seeker, and an opening is formed on the rear end surface of the long central axis, and an axially disposed shaft column is arranged in the opening, and a plurality of shafts are arranged on the outer circumference of the shaft column. One-way tooth.

In particular, a non-slip structure composed of a plurality of zigzag stripes or embossed patterns having irregularities is provided on the outer surface of the upper and lower pads.

In particular, the one-way tooth is a ratchet.

In particular, the one-way tooth system is optionally disposed over the entire outer circumference of the shaft column or only a portion of the outer circumference of the shaft column.

In particular, the interbody fusion cage further includes at least two positioning targets, each of which is disposed on the main body as far apart as possible from each other; the positioning target is a hollow portion disposed on the main body, or a type of An object made on a body and made of a material different from the body.

The present invention also provides an implant device for clamping an intervertebral cage and implanting it between adjacent vertebrae, the implant device comprising: a clamping rod having a long groove at a lower end thereof The two elastic clamping arms are defined, and the inclined surfaces extending from the inside to the outside are respectively disposed on the outer sides of the two elastic clamping arms, and the inner sides of the ends of the two elastic clamping arms are respectively provided with symmetrical C-shaped jaws for total Forming a jaw portion, and providing a plurality of one-way teeth on at least one C-shaped crotch portion; a grip portion pivotally combined with the upper end portion of the clamping rod; and a sliding sleeve a hollow cylinder which can be sleeved on the clamping rod, and a lower end edge of the sliding sleeve can be sleeved around the outer inclined surface of the two elastic clamping arms, so that the jaw portion of the clamping rod can be exposed to the sliding sleeve The lower end edge of the sleeve is opened; the relative position between the lower end edge of the sliding sleeve and the outer inclined surface of the two elastic clamping arms is changed by axially moving the sliding sleeve relative to the clamping rod, thereby controlling The jaw portion is closed or opened.

In particular, the one-way tooth is a ratchet.

In particular, the implanting device further includes a threaded section at a middle portion of the clamping rod, and an adjusting nut is disposed on the sliding sleeve, and the adjusting nut is sleeved on the clamping rod The screw is screwed onto the threaded section of the clamping rod, and the adjusting nut can be rotated to control the axial relative displacement between the clamping rod and the sliding sleeve.

This will further clarify other functions and technical features of the present work, which will be implemented by those skilled in the art after reading the description in the text.

100‧‧‧ interbody fusion cage

121‧‧‧Upper board

122‧‧‧Under the board

121a, 122a‧‧‧ slip-slip structure

123‧‧‧

124‧‧‧ seeker

124a‧‧‧ curved surface

124b, 124c‧‧‧ bevel

125‧‧‧ openings

126‧‧‧ shaft column

127‧‧‧ ratchet

150‧‧‧Targeting target

200‧‧‧ implanted instruments

210‧‧‧ grip

220‧‧‧ pinch

221‧‧ Thread segment

222‧‧‧Long groove

223‧‧‧Flexible clamp arm

224‧‧‧Bevel

225‧‧ ‧ jaws

226‧‧‧ ratchet

230‧‧‧Sleeve

231‧‧‧ Adjusting nuts

232‧‧‧Bottom edge socket

300‧‧‧ hollow catheter

D‧‧‧ Intervertebral disc

D1‧‧‧ Side wall

V‧‧‧ vertebrae

N‧‧‧ nerve

F‧‧‧ torque

X1‧‧‧ long axis axis

X2‧‧‧ central axis

Δ‧‧‧ angle

1A is a perspective view of an interbody cage of the present embodiment; [FIG. 1B] is a perspective view of another angle of view of the interbody cage of the present embodiment; [FIG. 1C] is an intervertebral space of the present embodiment. A perspective view of another perspective view of the cage; [Fig. 1D] is a plan view of the interbody cage of the present embodiment; [Fig. 1E] is a plan view of a partial cross section of the interbody cage of the present embodiment; [Fig. 1F] Is a side view of the interbody cage of the present embodiment; [Fig. 2A] is an exploded view of the implant device of the present creative embodiment; 2B is an external view of the implant device of the present embodiment; [FIG. 3A] is a close-up enlarged view of the jaw portion of the implant device of the present embodiment, showing the combination of the implant device and the interbody fusion cage. FIG. 3B is a plan view showing the combination of the implant device and the interbody cage of the present embodiment, showing that the implant device clamps the interbody cage on the same axis; [FIG. 3C] is the present embodiment. A close-up enlarged view of the jaw portion of the implant device showing a state in which the implant device and the interbody cage are combined; [Fig. 3D] is a combination of the implant device and the intervertebral cage of the present embodiment. The plan view shows that the implant device clamps the axis of the interbody cage to form an angle; [Fig. 3E] is a close-up enlarged view of the jaw of the implant device of the present embodiment, showing the implant device and the interbody cage A schematic diagram showing a state in which an angle is formed; [Fig. 3F] is a close-up enlarged view of the jaw portion of the implanted instrument of the present embodiment, showing a state in which the combination of the implant device and the interbody cage forms a maximum angle; 4A] is showing one has A side view of the spine structure of the site; [Fig. 4B] is a schematic view of the operation of implanting the intervertebral cage into the intervertebral disc with the implant device; [Fig. 4C] is an embodiment of the present invention An operational schematic of the inter-cluster implanted in the intervertebral disc and changing the clamping angle; and [Fig. 4D] is a schematic view of the embodiment of the invention in which the interbody cage has been mounted inside the intervertebral disc.

1A to 1F, the interbody cage 100 of the present embodiment is shown in detail, and FIGS. 2A to 2C show the implant device 200 of the present embodiment in detail, and FIGS. 3A to 3F detail the implant device of the present embodiment. The combination of 200 and interbody cage 100, and FIGS. 4A-4D illustrate in detail the method of operation of implanting intervertebral cage 100 between adjacent vertebrae using implant device 200.

Referring to Figures 1A-1F, the interbody cage 100 is implanted between adjacent vertebrae to reconstruct the intervertebral height. The main body of the interbody cage 100 includes an upper pad 121 and a lower pad 122. The upper pad 121 and the lower pad 122 maintain a gap therebetween, and are connected by a plurality of vertical portions 123 into a cage; the cage body In addition to reducing the weight and saving the cost of manufacturing materials, the structural features of the cage can provide space for new bone formation and enhance the fixation of the upper and lower vertebrae.

In order to maintain excellent mechanical strength and chemical resistance, and to avoid repulsion in the human body, the intervertebral cage is selected from the group consisting of absorbable polymer materials, non-absorbable polymer materials, metals, ceramics, and bones. Or a combination of two or more of the foregoing materials, but the scope of implementation is not limited thereto. For example, the absorbable polymer material may be, for example, a polylactic acid-glycolic acid copolymer (poly(lactic-co-) Glycolic acid), PLGA) or Poly-L-Lactic Acid (PLLA), the non-absorbable polymer may be, for example, polyetheretherketone (PEEK), the metal may be, for example, titanium or stainless steel, and the aggregate may be For example, it comes from the human body or other animals.

Further, on the outer surface of the upper pad 121 and the lower pad 122 of the interbody cage, the anti-slip structures 121a and 122a are provided, and the anti-slip structure is, for example, an embossed pattern of a plurality of zigzag stripes or irregularities. The anti-slip configuration can increase the positioning stability of the interbody cage 100 between the vertebrae, and avoid the consequences of surgical failure caused by the positional displacement after installation.

As is known, the shape and size of the interbody cage 100 can be determined according to the needs of the patient, but its shape must correspond to the structural shape of the mounting site, for example, when it is mounted on the leading or trailing edge of the vertebra. In general, the body appearance is in the shape of a pea or a crescent (see Fig. 1D), such that the interbody cage 100 has sufficient contact surface to bear the pressure between the vertebrae, and the interbody cage has an elongated body. , that is, the long axis size of the main body is larger than the wide shaft size This is an implantation operation that facilitates minimally invasive surgery, allowing the interbody cage to be accessed from the smallest size portion (ie, the wide shaft portion) through the catheter to facilitate the reduction of the surgical wound.

In the present embodiment, a first-line guide vane 124 is provided at the front end of the longitudinal center axis X1 of the interbody cage body, and an opening 125 is provided on the rear end surface of the longitudinal center axis X1 of the main body. The shaft column 126 is disposed in an upright direction, and a plurality of one-way teeth are disposed on the outer circumference of the shaft column, such as ratchet teeth 127, and the one-way teeth can be disposed on the entire outer circumference of the shaft column, or only A part of the outer circumference of the shaft column, for example, in the present embodiment, a plurality of ratchet teeth 127 are provided only in a range of about 90 degrees on one side of the outer circumference of the shaft column. The body of the seeker 124 can facilitate the smooth implantation of the interbody fusion cage 100 and ensure the safety of the implantation process; as shown in Figure 1E, the guide head 124 is disposed on the long central axis X1 of the interbody cage body. The front end edge of the guiding head is formed by a curved surface 124a between the side walls of the connecting main body and two inclined surfaces 124b and 124c extending from the upper backing plate and the lower backing plate respectively to form a three-dimensional streamlined structure.

In general, when a micro-wound is created to remove the intervertebral disc, the intervertebral disc is often unable to be completely removed and a portion of the intervertebral disc may remain; therefore, when the interbody cage 100 is implanted between the two vertebrae, The residual intervertebral disc may increase the resistance when the implant is implanted; since the implant end of the interbody fusion cage 100 of the present embodiment has a streamlined seeker 124, the annular fiber of the intervertebral disc can be easily peeled off during the implantation process. And effectively reducing the resistance formed by the residual intervertebral disc and accurately guiding the interbody cage 100 to the desired mounting position. In another aspect, the streamlined configuration at the front end of the seeker 124 prevents the intervertebral cage 100 from shifting as it advances during implantation, and prevents sharp tips from scratching or piercing peripheral nerves or tissue, The purpose of the interbody fusion cage 100 for safe implantation is in other words; in other words, the present embodiment can greatly improve the ease and safety of the surgical operation of the interbody fusion cage 100.

Referring to FIG. 1A and FIG. 1E , in the embodiment, the interbody cage 100 further includes at least two positioning targets 150 disposed on the main body so as to be separated from each other as far as possible. The positioning target 150 may be a hollow portion or an object made of a material different from the body. For example, when the body of the interbody cage is made of titanium metal, the positioning target 150 may be It is a circular hole or any hollow part of any geometric shape, or the body of the interbody cage is made of a polymer material, and the positioning target 150 may be a cylinder made of a titanium metal material; During implantation of the inter-gel device 100, a target scanning device, such as a surgical X-ray machine (C-arm), can be used to capture the position and angle parameters of the positioning target 150 on the interbody cage 100. In order to confirm the position and placement angle of the implant of the interbody cage 100 in an instant.

2A-2C illustrate a configuration of an implant device 200 of a preferred embodiment for clamping the interbody cage 100 of the prior embodiment and implanting it between adjacent vertebrae; The implant device 200 mainly includes a grip 210, a clamping bar 220 and a sliding sleeve 230.

The upper end portion of the clamping rod 220 is pivotally combined with the grip 210, and a threaded portion 221 is disposed at a middle portion of the clamping rod, and a lower end portion of the clamping rod 220 has a long groove 222 to define two elastic clamping arms 223. The outer side of the elastic clamping arm 223 is respectively provided with a slope 224 which is gradually enlarged from the inside to the outside, and the inner side of the end of the two elastic clamping arms are respectively provided with symmetrical C-shaped jaws to jointly form a jaw portion 225, and at least A C-shaped crotch portion is provided with a plurality of one-way teeth, such as ratchet teeth 226, which are intermeshing with the ratchet teeth 127 on the aforementioned interbody cage shaft post 126.

In addition, an adjusting nut 231 is disposed on the upper end of the sliding sleeve 230, and the sliding sleeve 230 can be sleeved on the clamping rod 220, so that the adjusting nut 231 can be screwed onto the threaded section 221 of the clamping rod, and the lower end edge of the sliding sleeve is sleeved. The 232 can be looped around the outer bevel 224 of the two elastic clamping arms 223 such that the jaw portion 225 of the clamping bar is exposed outside the lower end edge of the sliding sleeve 232.

According to the implant device 200 described above, when the adjusting nut 231 on the sliding sleeve rotates, the clamping rod 220 moves axially relative to the sliding sleeve 230, so that the lower end edge of the sliding sleeve 232 and the two elastic clamping arms The position of the outer bevel 224 changes, thereby controlling the closing or opening of the jaw portion 225.

The method of operation of clamping and releasing the implant device 200 with the interbody cage 100 will be further described below in conjunction with FIGS. 3A-3F.

3A-3C show a schematic view of the operation of the implant device 200 and the interbody cage 100. First, the front end of the two elastic clip arms 223 of the implanted instrument is opened in the jaw portion 224 of the implant device. The portion penetrates into the main body through the opening 125 of the interbody cage, and the jaw portion 225 is fastened to the shaft post, and then the adjusting nut 231 is rotated to displace the sliding sleeve 230 toward the lower end of the clamping rod 220, and the lower end edge of the sliding sleeve is 232. The outer inclined surface 224 of the two elastic clamping arms abuts the C-shaped crotch portion of the two elastic clamping arms 223 toward the inner side, and the jaw portion 225 is gradually closed, thereby clamping and clamping the shaft column 126 of the interbody cage. Conversely, the sliding sleeve 230 is displaced toward the upper end of the clamping rod 220, and the lower end edge sleeve 232 of the sliding sleeve is disengaged from the outer inclined surface 224 of the top elastic clamping arm, and the two elastic clamping arm clamping arms are returned to the original position by the elastic force, so that the jaw portion is The 225 is fully open, the jaw portion 225 releases the clamping of the shaft post 126, and the implant device 200 can be separated from the interbody cage 100. The operation of clamping and releasing the jaw portion 225 to the shaft post 126 can be controlled by the adjusting nut 231 on the sliding sleeve, thereby improving the ease of the surgical operation and the stability of the manipulation of the implant device 200.

The operation mode of changing the clamping angle between the implant device 200 and the interbody cage 100 is further illustrated in FIGS. 3D to 3F; the present invention has elastic strain characteristics by the two elastic clamping arms 223, and can be implanted in the device. In the case where the interbody cage is clamped, the operation is directly performed to change the clamping angle between the two, that is, centering on the clamping combination portion of the jaw portion 225 and the shaft post 126 Pointing, one or both of the clamping rod 220 of the implanted instrument or the body of the interbody cage 100 are oscillatingly displaced according to the central point, so that the clamping rod 220 of the implanted instrument is rotated relative to the shaft column 126 of the interbody cage. Put an angle. This convenient and fast mode of operation is possible, for example, as illustrated in Figures 3B, 3D, in operation, with the body of the interbody cage 100 immobilized, the clamping bar 220 of the implant device is clamped The clamping portion of the portion 225 and the shaft post 126 is pivoted at an angle from the center. At this time, the jaw portion 225 and the shaft post 126 are in a sandwiched state, but are provided by the two elastic clamping arms 223. The elastic strain characteristic, the ratchet teeth 226 of the jaw portion 225 can still be displaced in a forward direction to disengage the ratchet teeth 127 originally engaged with the shaft post 126 and engage the ratchet teeth at other adjacent positions on the shaft post 126 (eg, Figure 3E); and repeating the foregoing operation allows the combination of the implant device and the interbody cage to form a maximum angle (as shown in Figure 3F).

In the above operation method, the clamping angle between the implant device and the interbody cage 100 can be directly changed when the implant device and the interbody cage are in a clamping combination, thereby making the clamping angle between the implant device 200 and the interbody cage 100. The change is very easy and the operation is extremely fast; more specifically, this change in clamping angle can be performed and completed in a very small active space, making it ideal for use in minimally invasive surgery. However, on the other hand, during the operation of changing the clamping angle, the clamping of the shaft post 126 can be performed under the moderate relaxation of the jaw portion 225, so that it can be more labor-saving and easier. The engagement of the ratchet teeth 226 of the jaw portion with the shaft ratchet teeth 127 is converted.

4A-4D illustrate the method of operation and implementation steps of implanting the interbody cage 100 using the implant device 200.

Figure 4A shows a schematic diagram of a broken spinal structure. A part of the intervertebral disc D between two adjacent vertebrae V of the patient is pressed to the nerve N due to degeneration or prolapse. The surgically performed removal of the failed tissue, such as the broken bone piece, the intervertebral disc D, and the height between the two vertebrae V is reconstructed with the internal fixator and the interbody fusion cage 100 to stabilize the postoperative spine.

4B to 4D show a method of treatment using minimally invasive surgery; a hollow catheter 300 is mounted on the side of the vertebra V adjacent to the intervertebral disc D, and is transvaginal vertebral fusion (Transforaminal Lumbar Interbody). The Fusion, TLIF) approach implants the interbody cage 100 into a cavity caused by a discectomy D. When performing the treatment, the implant device 200 and the interbody cage 100 are first combined using the operation modes as described in FIGS. 3A-3C, that is, the jaw portion 225 of the implant device is passed through the opening of the interbody cage. 125 is fastened to the shaft post 126, and then the adjusting nut 231 is rotated so that the lower end edge of the sliding sleeve 232 abuts against the outer inclined surface 224 of the two elastic clamping arms, so that the jaw portion 225 is fastened and clamped with the shaft post 126, and The central axis X2 of the clamping rod 220 of the implant device and the long central axis X1 of the interbody cage are coincident in the same axial direction, thereby allowing the intervertebral cage 100 clamped by the implant device 200 to be smoothly It is pushed into the intervertebral disc D through the narrow hollow catheter 300.

During the operation, when the implant device 200 pushes the interbody cage 100 to the bottom of the hollow catheter 300, it may encounter resistance caused by residual tissue near the implantation site, such as residual disc D, which can be applied to the implanted device. The top edge of the grip 210 is struck by force, so that the implant device 200 holds the intervertebral cage 100 to move along the direction of the force application to advance the obstruction, thereby smoothly pushing the interbody cage 100 into the intervertebral disc D, and Avoid path deviation during the movement of the interbody cage, and injure nearby nerves and surrounding tissues.

The clamping angle of the replacement clamp and the interbody cage 100 during implantation is shown in FIG. 4C; when the interbody cage 100 is pushed into the intervertebral disc D, the guide head 124 of the interbody cage that continues to displace is contacted or When approaching the side wall D1 of the intervertebral disc D, it is necessary to change the implantation advancement angle of the interbody cage 100 for subsequent advancement displacement; wherein, the intervertebral cage 100 is changed. The clamping operation mode of the angle is described in detail in Figs. 3D and 3F; in operation, the clamping lever 220 of the implanting instrument is slightly turned to the left side centering on the clamping combination portion of the jaw portion 225 and the shaft post 126. The pendulum is such that a small angle δ is formed between the central axis X2 of the implant device and the long central axis X1 of the interbody cage, and then the top edge of the grip 210 of the implant device is tapped and forced forward. The interbody cage 100 is advanced. At this time, the guide head 124 generates a counterclockwise moment F on the long central axis X1 by the resistance of the side wall D1, and the intervertebral cage is acted upon by the moment F. During the forward displacement of the body of 100, the angle of the aforementioned angle δ is gradually enlarged, and at the same time, the ratchet teeth 226 of the jaw portion are displaced in the forward direction to disengage from the ratchet teeth originally engaged with the shaft column, and re-engaged to The next adjacent position of the ratchet 127, thus changing the clamping angle between the implant device 200 and the interbody cage 100; repeating the aforementioned steps of changing the clamping angle and applying the force until the final vertebra The main force of the inter-gel cage 100 properly installed on the edge of the vertebra V The area, that is, the inner side of the side wall D1 of the intervertebral disc D. Since the contour shape of the interbody cage 100 of the present embodiment is close to the shape of the side wall D1 of the intervertebral disc D, and the final position after implantation is also in the main force region of the vertebra V, the interbody cage 100 can be subjected to When the force is uniform, the pressure between the vertebrae is taken, so that the support can be effectively provided.

After the positioning and positioning of the interbody cage 100 is completed, the sliding sleeve 230 is displaced toward the upper end of the clamping rod 220, so that the jaw portion 225 is opened, and the jaw portion 225 releases the clamping of the shaft column 126, and the instrument 200 can be implanted. It is separated from the interbody cage 100 and then taken out.

By the above-mentioned implantation operation method, the interbody cage 100 can be placed into the body through a narrow tube, and the implant device 200 can also operate in the narrow space to make the interbody cage 100 displace and advance the angle of the placement. In order to be installed in the correct position in the disc D; therefore, the implantation process only needs to create a micro-wound of less than 3 cm in the patient, so the patient is in the surgical procedure It can avoid the risk of massive blood loss caused by large wounds and prevent damage to the surrounding tissues or nerves of the spine; further advantage is that the time for patients to recover after surgery can be shortened, and for example, the lower back can be avoided A sequela of weakness or pain.

In addition, during the aforementioned implantation process, the operating physician can utilize the target scanning device, such as a surgical X-ray machine (C-arm), to capture the position and angle parameters of the positioning target 150 on the interbody cage 100. To provide an operational reference for the immediacy of the surgical procedure, for example, when the front end of the guide head 124 of the interbody cage contacts the side wall D1 of the anterior disc, it can be judged according to relevant parameters to stop the continuous advancement of the implant device 200 and The clamping angle is changed to avoid the cutting of the side wall D1 of the intervertebral disc by the tapping process; in addition, when the advancing position or the angle of the intervertebral cage 100 is incorrect, the immediacy correction can be obtained thereby.

The above is the specific implementation of the interbody fusion cage and implant device of the present invention. The present creation is not limited thereto, and any substitutions, alterations, and modifications made in the technical ideas and technical principles of the creation belong to the creation. The scope of protection.

100‧‧‧ interbody fusion cage

126‧‧‧ shaft column

127‧‧‧ ratchet

224‧‧‧Bevel

225‧‧ ‧ jaws

226‧‧‧ ratchet

230‧‧‧Sleeve

232‧‧‧Bottom edge socket

X1‧‧‧ long axis axis

X2‧‧‧ central axis

Claims (13)

An interbody cage can be implanted between adjacent vertebrae to reconstruct an intervertebral height. The body of the interbody cage includes an upper pad and a lower pad, and a gap is maintained between the upper pad and the lower pad And the plurality of vertical portions are joined to form a cage shape; the body appearance is in the shape of a pea or a crescent, and the longitudinal dimension of the body is larger than the width dimension; and the front end of the main body has a first-line type The seeker and the rear end surface of the long central axis are provided with an opening, the shaft has an uprightly disposed shaft column, and a plurality of one-way teeth are disposed on the outer circumference of the shaft column. The interbody cage of claim 1, wherein the anti-slip structure is provided on an outwardly facing surface of the upper and lower pads. The interbody cage of claim 2, wherein the anti-slip structure is one of a plurality of serrated stripe or embossed embossed patterns. The interbody cage of claim 1, wherein the one-way tooth is a ratchet. The interbody cage of claim 1, wherein the one-way tooth system is selectively disposed over the entire outer circumference of the shaft column or only a portion of the outer circumference of the shaft column. The interbody cage according to claim 1, wherein the guiding head is formed by a curved surface connecting the side walls of the main body, and extends from the upper surface of the upper and lower pads respectively. The two inclined faces together form a three-dimensional streamlined structure. The interbody cage according to claim 1, wherein the interbody cage is made of an absorbable polymer material, a non-absorbable polymer material, a metal, a ceramic, an aggregate or Made by the combination of the above. The interbody cage according to claim 1, further comprising at least two positioning targets, each of which is disposed on the main body as far apart as possible from each other. The interbody cage of claim 8, wherein the positioning target is a hollow portion provided on the main body. The interbody cage of claim 8, wherein the positioning target is an object made on a body and using a material different from the body. An implantable device for clamping an intervertebral cage and implanting it between adjacent vertebrae, the implant device comprising: a clamping rod having a long groove at a lower end portion thereof to define a second elasticity The clamping arm has a beveled surface which is gradually enlarged from the inside and the outside on the outer side of the two elastic clamping arms, and a symmetry C-shaped crotch portion is respectively arranged on the inner side of the end of the two elastic clamping arms to jointly form a jaw portion, and a plurality of one-way teeth are disposed on the at least one C-shaped crotch portion; a grip is pivotally combined with the upper end portion of the clamping rod; and a sliding sleeve is a hollow cylinder, which can be stringed Nested on the clamping rod, the lower end edge of the sliding sleeve can be sleeved around the outer inclined surface of the two elastic clamping arms, so that the jaw portion of the clamping rod can be exposed outside the lower end edge of the sliding sleeve; The axial movement of the sliding sleeve relative to the clamping rod is used to change the relative position between the lower end edge of the sliding sleeve and the outer inclined surface of the two elastic clamping arms, thereby controlling the closing or opening of the jaw portion. . The implant device of claim 11, wherein the one-way tooth is a ratchet. The implantable device of claim 11, further comprising a threaded section at a middle portion of the clamping rod, and an adjusting nut disposed on the sliding sleeve, the sliding sleeve being sleeved on the clamping rod The adjusting nut can be screwed onto the threaded section of the clamping rod, and the adjusting nut can be rotated to control the axial relative displacement between the clamping rod and the sliding sleeve.