KR102528601B1 - Method of manufacturing permanent tooth prosthesis using 3D scanning - Google Patents

Abstract

The dental implant treatment method using the disclosed 3D scan includes a fixture placement step of placing and fixing a fixture to the alveolar bone, a fixture insertion unit inserted into the fixture, an exposure unit protruding out of the gum and exposed in the oral cavity, and exposure with the fixture insertion unit. A healing abutment installation step in which a gum regeneration guide unit is provided between the parts and the light reflection of the exposed portion is smaller than the light reflection of the metal so that a 3D scanable healing abutment is fixed to the fixture, before the gum is regenerated around the healing abutment , A 3D scan step before gum regeneration by 3D scanning the healing abutment and its surroundings to generate scan data before gum regeneration, a fixation abutment manufacturing step for manufacturing a fixation abutment by 3D printing based on the scan data before gum regeneration, the A permanent dental prosthesis manufacturing step of manufacturing a permanent dental prosthesis by 3D printing based on scan data before gum regeneration, and after the gum is regenerated around the healing abutment, the healing abutment is removed from the fixture, and the fixing abutment and permanent A fixing abutment for fixing and installing a dental prosthesis to the fixture and a permanent dental prosthesis installation step are provided.

Description

Method of manufacturing permanent tooth prosthesis using 3D scanning {Method of manufacturing permanent tooth prosthesis using 3D scanning}

The present invention relates to dental implant surgery, and more particularly, to a method of performing dental implant surgery by 3D scanning a healing abutment and manufacturing a fixed abutment and a permanent dental prosthesis by 3D printing.

In dental treatment, dental implant surgery is to transplant artificial teeth. After implanting a fixture made of titanium or titanium alloy that does not have a rejection reaction to the human body in the alveolar bone from which teeth have been removed, artificial teeth It is a procedure to restore the function of teeth by fixing them. In the case of dentures, the surrounding teeth and bones may be damaged over time, but implants do not damage the surrounding dental tissues, and have the same function and shape as natural teeth, but do not cause cavities, so they can be used semi-permanently.

Briefly describing the conventional dental implant procedure, first, a groove corresponding to the dimensions of the fixture is formed through a drilling and tapping process in the alveolar bone, and the fixture is implanted into the alveolar bone. When the fixture is fixed to the alveolar bone by bone fusion, a healing abutment is fixedly fastened to the fixture to aesthetically reconstruct the gum. When the gum is aesthetically reconstructed, the healing abutment is removed from the fixture, the impression coping is fastened to the fixture, the impression coping is covered and an impression is taken, and based on the acquired impression, a fixed abutment and permanent A dental prosthesis, ie a crown, is fabricated. Meanwhile, while the fixing abutment and the permanent dental prosthesis are manufactured, the healing abutment is again fastened to the fixture. When the fixing abutment and the permanent dental prosthesis are fabricated, the healing abutment is removed from the fixture again, the fixing abutment is fixedly fastened to the fixture, and the permanent dental prosthesis is fixedly coupled to the fixing abutment.

In the conventional dental implant procedure, the healing abutment is fixed to the fixture and removed, then an impression is taken, and the healing abutment is fixed to the fixture again until the manufacturing of the fixed abutment and the permanent tooth prosthesis is completed. Go through the steps of removing it from the fixture again. Accordingly, the period until the dental implant procedure is completed is delayed and the dental clinic must also visit frequently, which increases the inconvenience of cost and time loss.

Publication No. 10-2015-0036467

The present invention fastens the healing abutment to the fixture, performs a 3D scan before the gum is regenerated, and manufactures a fixed abutment and a permanent tooth prosthesis based on the scan data, thereby shortening the period of dental implant treatment and reducing costs. Provided is a dental implant treatment method using a scan.

The present invention provides a fixture placement step of placing and fixing a fixture to the alveolar bone, a fixture insertion unit inserted into the fixture, an exposure unit protruding out of the gum and exposed in the oral cavity, and the fixture insertion unit and exposure. A healing abutment installation step of providing a gum regeneration guide part between the parts and fixing a healing abutment capable of 3D scan (3 digit scan) to the fixture because the light reflection of the exposed part is smaller than the light reflection of the metal, the Before the gum is regenerated around the healing abutment, a 3D scanning step before gum regeneration by 3D scanning the healing abutment and its surroundings to generate pre-gum regeneration scan data, fixed by 3D printing based on the pre-gum regeneration scan data A fixed abutment manufacturing step of manufacturing a dental abutment, a permanent dental prosthesis manufacturing step of manufacturing a permanent dental prosthesis by 3D printing based on the scan data before gum regeneration, and after the gum is regenerated around the healing abutment, the A dental implant treatment method using 3D scan is provided, comprising a step of removing the healing abutment from the fixture and installing the fixing abutment and the permanent tooth prosthesis to the fixture.

The step of manufacturing the abutment for fixation and the step of manufacturing the permanent dental prosthesis are performed separately, and the step of installing the abutment for fixation and the permanent dental prosthesis includes removing the healing abutment from the fixture, removing the abutment for fixation, A fixing step of fixing the abutment to the fixture and a step of fixing the permanent dental prosthesis by covering the abutment for fixation with dental cement as a medium may be provided.

The manufacturing of the permanent dental prosthesis may include forming a permanent dental prosthesis integrally coupled to the fixing abutment by laminating materials of the permanent dental prosthesis on the fixing abutment by 3D printing.

The fixing abutment and the permanent dental prosthesis may be made of the same material, and the fixing abutment manufacturing step and the permanent dental prosthesis manufacturing step may be performed together so that the fixing abutment and the permanent dental prosthesis are integrally formed.

In the dental implant treatment method using the 3D scan, after the 3D scan step before the gum regeneration, when the end of the gum is regenerated around the healing abutment, the end of the regenerated gum is 3D scanned to generate scan data after gum regeneration A 3D scanning step after gum regeneration is further provided, and the fixing abutment manufacturing step is based on the pre-gum regeneration scan data and additionally referring to the scan data after the gum regeneration to manufacture the fixing abutment by 3D printing The step of manufacturing the permanent tooth prosthesis includes manufacturing the permanent tooth prosthesis by 3D printing based on scan data before gum regeneration and additionally referring to scan data after gum regeneration. can

According to the present invention, a fixed abutment and a permanent tooth prosthesis are manufactured by 3D printing using 3D scan data before gum regeneration generated by 3D scanning the inside of the oral cavity before gum regeneration with the healing abutment fixed to the fixture, When the gum is regenerated, the healing abutment is immediately removed from the fixture and the fixing abutment and the permanent tooth prosthesis are fixedly installed on the fixture, thereby greatly reducing the period of dental implant treatment and reducing the cost of dental implant treatment.

In addition, since clear 3D scan data can be obtained through 3D scanning without covering the healing abutment with a scan cap or applying polish remover, dental implant surgery is facilitated and costs are reduced.

1 is a flow chart of a dental implant treatment method using a 3D scan according to an embodiment of the present invention.
2 is a cross-sectional view showing a state in which a 3D scannable healing abutment is installed on a fixture placed in an alveolar bone.
3 is a front view showing a state in which a fixed abutment and a permanent tooth prosthesis are installed in a fixture after the gum is regenerated.

Hereinafter, a dental implant treatment method using a 3D scan according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Terminologies used in this specification are terms used to appropriately express preferred embodiments of the present invention, which may vary according to the intention of a user or operator or conventions in the field to which the present invention belongs. Therefore, definitions of these terms will have to be made based on the content throughout this specification.

1 is a flowchart of a dental implant treatment method using 3D scan according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a 3D scannable healing abutment installed on a fixture placed in the alveolar bone, and FIG. This is a front view showing the fixed abutment and permanent dental prosthesis installed on the fixture after regeneration. Referring to FIG. 1, the dental implant treatment method using 3D scan according to an embodiment of the present invention includes a fixture placement step (S10), a healing abutment installation step (S20), a 3D scan step before gum regeneration (S30), and fixation Abutment manufacturing step (S40), permanent dental prosthesis manufacturing step (S50), and fixing abutment and permanent dental prosthesis installation step (S60) are provided.

1 to 3 together, the fixture placement step (S10) is a step of placing a fixture 10 on the alveolar bone 1 of the patient. The fixture 10 is a member having a screw hole 13 extending in the longitudinal direction and having an open upper side, and a male screw pattern 11 on an outer circumferential surface thereof to be fixed to the alveolar bone 1. and a female screw pattern 12 is formed on the inner circumferential surface of the screw hole 13 . The fixture 10 is placed and fixed at or around the point where the tooth root is missing from the alveolar bone 1 of the patient. In the process of placing the fixture 10 on the alveolar bone, the gum 3 covering the alveolar bone is partially incised.

The healing abutment installation step (S20) is a step of fixing and installing a healing abutment 20 capable of 3D scan (3 digit scan) to the fixture 10. The healing abutment 20 is fixedly coupled to the fixture 10 using a screw 41 so that the gum esthetically regenerates in the process of regenerating the damaged gum 1 in order to place the fixture 10 thereon. The healing abutment 20 includes a base 21 fitted into the fixture 10 and an abutment protrusion 31 integrally bonded to the base 21 and protruding in a direction away from the fixture 10 ) is provided. Base 21 may be formed of a metal material. Preferably, the base 21 may be formed of pure titanium (Ti) or a titanium alloy having excellent biocompatibility.

The base 21 has an outer circumferential surface bonded to the abutment projection 31 and abutment projection junction 22 covered by the abutment projection 31, a fixture insertion portion 26 inserted into the fixture 10, and the abutment It is formed between the protrusion joint 22 and the fixture insertion portion 26, and has a diameter larger than the diameter of the abutment protrusion joint 22, radial direction around the axis AX of the healing abutment 20 It has a flange portion (24) extended to.

The base 21 further includes a polygonal projection 27 having a polygonal cross section such as a hexagon or an octagon. The outer circumferential surface of the fixture insertion portion 26 is inclined so that the diameter gradually expands toward the flange portion 24 from the polygonal protrusion 27 . Screw through-holes 28w and 28s extending in a row along the axis AX are formed in the base 21 so that the screw 41 passes therethrough. The screw through holes 28w and 28s formed in the base 21 have a relatively small inner diameter portion 28s close to the fixture 10 and a larger inner diameter than the small inner diameter portion 28s, and have a relatively small inner diameter portion 28s. ) and a larger inner diameter 28w farther from the fixture 10 than . The large inner diameter portion 28w and the small inner diameter portion 28s are separated by a stepped surface 29.

On the inner circumferential surface around the inlet of the screw hole 13 formed in the fixture 10, a base seating groove 14 into which the fixture insertion portion 26 and the polygonal protrusion 27 of the base 21 are fitted and seated. ) is formed. The base seating groove 14 has a polygonal inner circumferential surface portion 16 having a polygonal inner circumferential surface corresponding to the polygonal protrusion 27 and an inclined inner circumferential surface corresponding to the inclined outer circumferential surface of the fixture insertion part 26. It has an inner circumferential portion (15). When the base 21 of the healing abutment 20 is seated in the base seating groove 14, the healing abutment 20 does not rotate around the axis AX.

The abutment protrusion 31 leads to the flange portion 24 of the base 21 and extends in diameter as it moves away from the fixture 10, followed by the gum regeneration guide portion 32 and the gum regeneration guide portion 32 It has an exposed portion 33 further spaced apart from the fixture 10 than the gum regeneration guide portion 32 . The exposed portion 33 protrudes out of the gum 1 and is exposed to be visible in the oral cavity of the patient. The gum regeneration guide part 32 is a part that induces the gum 1 to grow as intended in the process of regenerating the gum 1, and exposes the fixture insertion part 26 and the abutment protrusion 31 of the base 21 It is provided between the parts 33, more precisely, between the flange part 24 and the exposed part 33.

A screw through hole 37 extending along the axis AX is formed in the abutment protrusion 31 . The inner diameter of the screw through hole 37 of the abutment protrusion 31 coincides with the inner diameter of the large inner diameter portion 28w of the base 21 . The abutment protrusion 31 and the screw through holes 37, 28w, and 28s of the base 21 are aligned in a straight line along the axis AX so that the screw 41 passes therethrough. When the base 21 of the healing abutment 20 is inserted into the base seating groove 14 and seated, the screw through holes 37, 28w, and 28s of the healing abutment 20 and the screw hole 13 of the fixture 10 are aligned in a straight line along the axis AX.

The abutment protrusion 31 is integrally bonded to the base 21 and may be formed of a polymer resin material. Preferably, the abutment protrusion 31 is made of PEEK (polyetheretherketone)-based synthetic resin, PEKK (polyetherketoneketone)-based synthetic resin, polyethersulfone (PESU; polyethersufone)-based synthetic resin, Alternatively, it may be formed of a polyetherimide (PEI)-based synthetic resin. Since PEEK and PEKK are excellent in abrasion resistance and impact resistance, the healing abutment 20 may exhibit durability comparable to that of a healing abutment entirely made of a metal material. The PEEK-based synthetic resin, the PEKK-based synthetic resin, the polyethersulfone-based synthetic resin, and the polyetherimide-based synthetic resin may include a small amount of additives in addition to the main materials PEEK, PEKK, polyethersulfone, and polyetherimide, respectively.

Polymeric resin materials such as the PEEK-based synthetic resin, the PEKK-based synthetic resin, the polyethersulfone-based synthetic resin, and the polyetherimide-based synthetic resin are, for example, titanium (Ti), which is used as a material for a conventional healing abutment. Harder than metals such as titanium alloys Although this is a little weak, it is an engineering plastics (engineering platstics) that has enough rigidity to be applied to a healing abutment that is used temporarily until it is replaced by a fixed abutment, harmless to the human body, and the cost of the material is higher than that of titanium and titanium alloy. It is cheaper. In addition, the PEEK-based synthetic resin, the PEKK-based synthetic resin, the polyethersulfone-based synthetic resin, and the polyetherimide-based synthetic resin are applied to the abutment protrusion 31 in a color that almost matches the original tooth color of the patient undergoing dental implant treatment. do.

The polymer resin material has a lower light reflectance than metal materials such as titanium (Ti) and titanium alloy. Therefore, a gloss removal liquid is applied to the exposed portion 33 of the abutment protrusion 31 or a scan cap is applied. Even if the inside of the oral cavity is 3D scanned (3 digit scan) without covering, it is possible to 3D scan clearly without errors such as blurring. Thus, the fixing abutment 50 and the permanent tooth prosthesis 60 may be manufactured using the scan data obtained by 3D scanning the inside of the oral cavity. As a result, when the healing abutment 20 capable of 3D scanning is used, the cost of dental implant surgery is reduced and the time required for dental implant surgery is reduced compared to the case of using a healing abutment made of all metal parts.

The screw 41 for fastening the healing abutment 20 to the fixture 10 is a screw column 43 extending along the axis AX, and a screw head formed at the upper end of the screw column 43 to have an expanded diameter (42) is provided. A male screw pattern 45 is formed on an outer circumferential surface of an end of the screw pillar 43 . The screw through hole 37 of the abutment protrusion 31 inserts the screw 41 into the state where the fixture insertion portion 26 and the polygonal protrusion 27 of the base 21 are inserted into the base seating groove 14 of the fixture 10 ) and rotated in one direction, the male screw pattern 45 at the end of the screw column 43 passing through the screw through holes 37, 28w, and 28s of the abutment protrusion 31 and the base 21 is the fixture It is fastened to the female screw pattern 12 of the screw hole 13.

The screw 41 is driven in one direction until the screw head 42 is caught on the stepped surface 29 formed on the inner circumferential surface of the screw through-holes 28w and 28s of the base 21 and the screw 41 cannot be rotated any more. By continuing to rotate, the healing abutment 20 is firmly coupled to the fixture 10 by the screw 41.

A pair of direction indicating cut surfaces 35 spaced apart at intervals of 180° around the axis AX are formed on the outer circumferential surface of the distal end of the abutment protrusion 31 . The direction-indicating cut surface 35 is a surface that is discriminated from the surrounding area on the outer circumferential surface of the distal end of the exposed portion 33 . When the fixture insertion part 26 and the polygonal protrusion 27 of the base 21 are fitted into the base seating groove 14 of the fixture 10, the healing abutment through the direction indicated by the direction indicating cut surface 35 The installation direction of (20) can be known. The exposed portion 33 is formed long enough to have a sufficient height so that the exposed portion 33 and the pair of direction-indicating cut surfaces 35 can be clearly seen in the oral cavity of the patient.

The healing abutment 20 helps to regenerate and recover the incised and injured alveolar bone 1 and gum 3 for tooth extraction and fixture 10 implantation. In addition, in the case of manufacturing the fixed abutment 50 and the permanent tooth prosthesis 60 using the scan data generated by 3D scanning the inside of the oral cavity, the healing abutment 20 fixed to the fixture 10 Even if it is scanned as it is, image errors such as blurring or blurring due to light reflection do not occur.

The healing abutment 20 is a heterogeneous material bonding layer 39 formed by chemically bonding the metal material of the base 21 and the polymer resin material of the abutment projection 31 at the interface where the base 21 and the abutment projection 31 are combined can be further provided. The heterogeneous material bonding layer 39 is a layer strongly bonded so that the base 21 and the abutment protrusion 31 are not separated at the interface between the two. In the heterogeneous material bonding layer 39, the metal material of the base 21 and the abutment protrusion The polymeric resin material of (31) is covalently or ionicly bonded.

The healing abutment 20 is formed by inserting the base 21 into a cavity (not shown) of a mold (not shown), injecting and injecting a molten polymer resin into the cavity, and curing the abutment protrusion 31 It may be formed by insert molding, and a metal pretreatment agent may be applied to the interface of the base 21 bonded to the abutment protrusion 31 to form the heterogeneous material bonding layer 39. In addition, a polymer resin pretreatment agent and a thermal conductive additive may be mixed with the molten polymer resin.

The healing abutment 20 may be manufactured by a method including a base forming step and an injection injection step. The base forming step is a step of forming a base formed of a metal material. For example, the base 21 may be formed by mechanical processing such as CAD/CAM processing, or may be formed by die-casting.

In the insertion injection step, the base 21 is inserted into a cavity (not shown) corresponding to the shape of the healing abutment 20 in the injection molding mold (not shown), and the molten polymer resin is injected into the cavity This step is to form the abutment protrusion 31 integrally bonded to the base 21 by injecting and curing. The healing abutment 20 including the abutment protrusion 31 hardened in the cavity is taken out of the injection molding mold after the upper core (not shown) and the lower core (not shown) of the injection molding mold are opened.

On the other hand, the boundary surface of the base 21 that comes into contact with the abutment projection 31 prior to inserting and seating the base 21 into the injection molding mold to form the heterogeneous material bonding layer 39, that is, the abutment projection junction 22 A liquid containing a metal pretreatment agent that induces a preferential reaction between the metal material of the base 21 and the polymer resin material of the abutment protrusion 31 may be applied to the outer circumferential surface of the ) and the upper surface of the flange portion 24. As the metal pretreatment agent, for example, a metal salt-based material containing the same components as the metal material of the base 21 may be used.

In addition, a polymer resin pretreatment agent and a thermal conductive additive may be mixed with the molten polymer resin. The polymer resin pretreatment agent is a material that promotes interfacial bonding of the base 21 with the metal material, for example, a metal salt-based material that shares a radical group belonging to a base polymer of the polymer resin material of the abutment protrusion 31. material can be used. The thermally conductive additive is a material added to compensate for thermal conduction of a portion where the morphology of a polymer resin that causes a substitution bond (sharing of free electrons) with a metal material on the surface of the base 21 through a chemical reaction is formed.

While the molten polymer resin, in which the polymer resin pretreatment agent and the thermal conductive additive are mixed, is injected into the cavity of the injection molding mold and cured, the metal material and the polymer at the interface between the base 21 and the abutment protrusion 31 A chemical reaction occurs between the resin materials to form a heterogeneous material bonding layer 39, and the base 21 and the abutment protrusion 31 are firmly bonded.

On the other hand, instead of the heterogeneous material bonding layer 39, dental adhesive is applied to the interface where the base 21 and the abutment projection 31 are coupled, and the cured adhesive layer (not shown) is applied to the base 21 and the abutment projection ( 31) may be formed on the bonded interface. The adhesive layer may reinforce the bond between the base 21 and the abutment protrusion 31 . In order to form the adhesive layer, the boundary surface of the base 21 that comes into contact with the abutment protrusion 31 prior to inserting and seating the base 21 into the injection molding mold, that is, the outer circumferential surface of the abutment protrusion joint 22 and the flange portion ( 24), a dental adhesive is applied to the upper surface, and then the molten polymer resin is injected into the cavity of the injection molding mold and cured.

On the other hand, instead of the healing abutment 20, a healing abutment formed only of a polymer resin material without a metal material may be fixed to the fixture 10. Specifically, the healing abutment formed of only the polymer resin material is a PEEK (polyetheretherketone)-based synthetic resin, a PEKK (polyetherketoneketone)-based synthetic resin, a polyethersulfone (PESU; polyethersufone)-based synthetic resin, or a polyetherimide (PEI)-based synthetic resin. can be formed

The healing abutment formed of only the polymer resin material has a fixture insertion portion inserted into the fixture 10, an exposed portion protruding out of the gum and exposed in the oral cavity, and a gum formation guide portion between the fixture insertion portion and the exposed portion, , The fixture insertion portion, the exposed portion, and the gum forming guide portion may be integrally formed. A direction-indicating cut surface indicating an installation direction of the healing abutment is formed on the outer circumferential surface of the distal end of the exposed portion. The healing abutment formed of only the polymer resin material has a screw through hole formed so that a screw is fastened to the fixture 10 through the fixture insertion part, gum formation guide part, and exposed part.

In the 3D scanning step before gum regeneration (S30), before the gum 3 is regenerated around the healing abutment 20, the healing abutment 20 and its surroundings are 3D scanned to generate scan data before gum regeneration It is a step to A 3D scan may be performed using a scanner (not shown) capable of scanning the inside of the oral cavity. When the fixing abutment 50 and the permanent tooth prosthesis 60 fixed thereto are manufactured based on the scan data before gum regeneration, the scan data before gum regeneration is used as a library of the fixing abutment and permanent tooth prosthesis A process of matching data stored in is required. The direction of the direction-indicating cut surface 35 shown in the scan data before gum regeneration becomes a reference direction when matching the healing abutment 20 installed in the oral cavity with the data of the library.

On the other hand, depending on the condition of the patient, there is a case where the alveolar bone 1 at the point where the fixture 10 is to be placed is insufficient. The example shown in FIG. 2 is a case where the alveolar bone 1 of the front upper end of the fixture 10 is insufficient. When the alveolar bone 1 is insufficient, the fixture 10 is not firmly embedded in the alveolar bone 1 and is not fixed. Because of this, since the fixture 10 and the structures coupled thereto may shake or fall out during or after the dental implant procedure, in order to prevent this, an alveolar bone reinforcement step is added before the 3D scan step (S30) is performed before gum regeneration can be performed with

In the alveolar bone reinforcement step, the bone graft material 8 is filled into the gum 3 around the fixture 10 in order to reinforce the insufficient alveolar bone 1, and the filled bone graft material 8 is inside the gum 3. This is a step of sealing the gum 3 so that it is maintained and hardened without moving or dispersing. The bone graft material 8 is filled in the form of a powder so that the upper end of the exposed fixture 10 is buried. The incised gums 3 for fixture 10 placement and bone graft material 8 supplementation are sutured with medical threads. The sutured gum 3 covers the alveolar bone 1 and the bone graft material 8 so that the alveolar bone 1 and the bone graft material 8 are not exposed in the oral cavity. The distal end of the sutured gum 3 covers the exposed portion 33 of the healing abutment 20 or does not extend to touch the exposed portion 33 . As the bone graft material 8 , for example, artificial bone powder, autologous tooth bone graft material powder, and animal bone powder may be used. The fixture placement step (S10), the healing abutment installation step (S20), the alveolar bone reinforcement step, and the 3D scan step before gum regeneration (S30) may be performed during one day when the patient visits the dentist.

On the other hand, after the healing abutment 20 is installed, until the gum 2 is regenerated, in order to alleviate the dental hygiene problem of food being caught around the healing abutment 20 and the psychological problem of reluctance to open the mouth, the healing abutment ( A protective cap may be put on the abutment protrusion 31 of 20).

The fixing abutment manufacturing step (S40) is a step of manufacturing a fixing abutment by 3D printing based on the scan data before gum regeneration. The permanent dental prosthesis manufacturing step (S50) is a step of manufacturing a permanent dental prosthesis by 3D printing based on the scan data before gum regeneration. The scan data before gum regeneration includes information about the tilted direction and angle of the healing abutment 20 and the height of the healing abutment 20 . Such information is reflected in the design of the fixing abutment 50 and the permanent dental prosthesis 60 so that the patient-specific customized fixing abutment 50 and the customized permanent dental prosthesis 60 can be manufactured.

In FIG. 1, it is shown that the manufacturing step of the permanent dental prosthesis (S50) is performed after the manufacturing of the abutment for fixation (S40), but in the first embodiment to be described below, the manufacturing of the abutment for fixation (S40) and the permanent Since the dental prosthesis manufacturing step (S50) is performed separately, the fixing abutment manufacturing step (S40) and the permanent dental prosthesis manufacturing step (S50) may be performed simultaneously, and the permanent dental prosthesis manufacturing step (S50) may be performed at the same time. It may be performed before the fixing abutment manufacturing step (S40).

The fixing abutment manufacturing step (S40) includes the steps of forming a fixing abutment modeling file based on CAD (computer aided design) using the information included in the scan data before gum regeneration, and the fixing A step of manufacturing the abutment 50 for fixation through 3D printing using the abutment modeling file. The 3D printing may be, for example, DED (direct energy deposition) in which a material made of metal powder such as titanium (Ti) or titanium alloy is supplied and melted and laminated with a laser to form the abutment 50 for fixing. However, 3D printing is not limited to DED, and may be 3D printing of another method such as, for example, power bed fusion (PBF).

In the conventional method of manufacturing an abutment for fixation by cutting an intermediate material for abutment for fixation based on CAM, the manufacturing cost of the abutment 50 for fixation is high and the quality However, in the present invention, since the fixing abutment 50 is manufactured through 3D printing, manufacturing cost is reduced and quality is improved.

The fixing abutment 50 includes a prosthesis insertion unit 52 fitted to the permanent dental prosthesis 60, a fixture insertion unit (not shown) fitted into the fixture 10, and a prosthesis insertion unit 52 and the fixture insertion It has an intermediate part 55 between the parts. The shape of the middle portion 65 is the shape of the gum end 5 and the gum end 5 so that it can be inserted into the gum 3 (see FIG. 5) without a foreign body feeling through the regenerated gum end 5. ) to the fixture 10. If amplified, the outer circumferential edge line of the stepped surface 56 whose outer diameter is extended, which is the boundary between the intermediate portion 55 and the prosthesis insertion portion 52, is the line of the regenerated gum end 5 can be designed to match Then, since all parts of the intermediate portion 65 are hidden inside the regenerated gum 3, the permanent tooth prosthesis 60 covered by the fixing abutment 50 cannot be easily distinguished from natural teeth.

Although the scan data before gum regeneration does not include information about the line of the gum end 5 that has actually been regenerated over time after the installation of the healing abutment 20, teeth adjacent to the healing abutment 20 in the oral cavity, and information about the distal line of the unincised gum covering the adjacent tooth. Therefore, if the model of the abutment for fixation extracted from the library of the abutment for fixation is modified according to the patient in consideration of the above information, the outer circumferential edge line of the step surface 56 is reproduced with the line of the gum end 5 Matching or near matching anchoring abutment modeling files can be created.

In the step of manufacturing a permanent dental prosthesis (S50), a CAD-based permanent dental prosthesis modeling file is formed using the information included in the scan data before gum regeneration, and 3D printing is performed using the permanent dental prosthesis modeling file. and manufacturing a permanent dental prosthesis 60 . The permanent tooth prosthesis 60 may be made of a metal such as a gold (Au) alloy or a platinum (Pt) alloy, or ceramic.

Similar to the 3D printing of the fixing abutment 50, the 3D printing of the permanent dental prosthesis 60 also supplies materials made of metal powder such as, for example, gold (Au) alloy and platinum (Pt) alloy, and at the same time laser It may be DED that is melted and laminated by melting, or PBF (power bed fusion). In the case where the permanent dental prosthesis 60 is formed of ceramic, a process of printing and stacking a ceramic composition as a material material and curing by irradiating light or electron beams thereto is repeated to obtain a multi-layered permanent dental prosthesis ( 60), or the ceramic composition is printed and laminated in multiple layers and fired and cured to form the permanent dental prosthesis 60.

The size and shape of the permanent dental prosthesis 60 is designed to be in harmony with the size, shape, and protruding direction of the surrounding teeth (not shown) of the fixing abutment 50 placed on the fixture 10 . The abutment fitting groove 62 for fixing of the permanent dental prosthesis 60 is designed to a size that allows the prosthesis insertion part 62 of the fixing abutment 50 to be sufficiently accommodated in the fixing abutment fitting groove 62, and , The permanent tooth prosthesis 60 is designed to have an appropriate size and shape so as not to rotate with respect to the prosthesis insertion part 52 in a state in which the prosthesis insertion part 52 is covered.

In the fixing abutment and permanent tooth prosthesis installation step (S60), after the gum 3 is regenerated around the healing abutment 20, the healing abutment 20 is removed from the fixture 10, and the fixing abutment (50) and a step of fixing and installing the permanent dental prosthesis (60) to the fixture (10). In FIG. 2, reference numeral '5' indicates the outline of the regenerated gum end. The regenerated gum tip 5 regenerates and grows over time and contacts the gum regeneration guide portion 32 of the healing abutment 20 .

Specifically, the step of installing the abutment for fixation and the permanent dental prosthesis (S60) includes a step for removing the healing abutment, a step for fixing the abutment for fixation, and a step for fixing the permanent tooth prosthesis. In the step of removing the healing abutment, the healing abutment 20 is separated from the fixture 10 by turning the screw 41 fixing the healing abutment 20 to the fixture 10 in the opposite direction to the tightening direction, and the fixture 10 This is the step of removing it from the In the fixing abutment fixing step, the fixture insertion portion (not shown) of the fixing abutment 50 is inserted into the fixture 10, and a screw (not shown) is tightened to fix the fixing abutment 50 to the fixture 10 It is a stage of fixed coupling to . The step of fixing the permanent dental prosthesis is a step of covering and fixing the permanent dental prosthesis 60 to the fixing abutment 50 with dental cement (not shown) as a medium. In other words, the dental cement is applied to the inner circumferential surface of the abutment fitting groove 62 for fixing of the permanent tooth prosthesis 60, and the permanent tooth prosthesis 60 is inserted into the prosthesis insertion part 52 of the fixing abutment 50 put on When the dental cement hardens, the permanent tooth prosthesis 60 is fixedly coupled to the abutment 50 for fixation.

The permanent dental prosthesis 60 shown in FIG. 3 is a crown corresponding to one tooth that has been removed or lost, but is not limited thereto. It may also be a corresponding bridge.

On the other hand, the dental implant treatment method of the present invention may include a fixing abutment manufacturing step and a permanent tooth prosthesis manufacturing step different from those described above. For example, in the step of manufacturing abutment for fixation, the abutment for fixation is manufactured by 3D printing based on the scan data before gum regeneration, as in the above-described S40, but in the step of manufacturing a permanent tooth prosthesis, the abutment for fixation produced by 3D printing is 3D printed A step of forming a permanent dental prosthesis integrally coupled to the abutment for fixation may be provided by laminating materials of the permanent dental prosthesis. In this case, the step of manufacturing the permanent dental prosthesis is necessarily performed after the step of manufacturing the abutment for fixation. In addition, the steps of installing the healing abutment and the permanent tooth prosthesis are completed only by inserting and fixing the fixture insertion part of the fixing abutment to the fixture. Since the step of combining the fixing abutment and the permanent tooth prosthesis through dental cement is not provided, the step of installing the fixing abutment and the permanent tooth prosthesis can be completed more quickly.

As another example, when the fixing abutment and the permanent dental prosthesis are made of the same material as metal powder, the fixing abutment manufacturing step and the permanent dental prosthesis manufacturing step are performed together so that the fixing abutment and the permanent dental prosthesis are integrally formed It can be. In other words, through 3D printing, metal materials are laminated layer by layer to form an artificial tooth in which the fixed abutment and the permanent tooth prosthesis are integrally connected. It may be, or it may be laminated in the reverse order. In this case, the steps of installing the healing abutment and the permanent tooth prosthesis are completed only by inserting and fixing the part of the artificial tooth corresponding to the fixture insertion part of the fixing abutment to the fixture. Since the step of combining the fixing abutment and the permanent tooth prosthesis through dental cement is not provided, the step of installing the fixing abutment and the permanent tooth prosthesis can be completed more quickly.

According to the dental implant treatment method using 3D scan described above, 3D scan data before gum regeneration generated by 3D scanning the inside of the oral cavity before the gum 3 is regenerated while the healing abutment 20 is fixed to the fixture 10 Using 3D printing to produce a fixed abutment 50 and a permanent tooth prosthesis 60, and when the gum is regenerated, immediately remove the healing abutment 20 from the fixture 10 and the fixing abutment 50 By fixing and installing the permanent dental prosthesis 60 to the fixture, it is possible to significantly shorten the period of dental implant treatment and reduce the cost of dental implant treatment. In addition, since clear 3D scan data can be obtained through 3D scanning without covering the healing abutment 20 with a scan cap or applying a polish remover, dental implant surgery is facilitated and costs are reduced.

On the other hand, in the dental implant procedure method of the present invention, after the 3D scanning step (S30) before the gum regeneration, when the end 5 of the gum is regenerated around the healing abutment 20, the end 5 of the regenerated gum A 3D scan step after gum regeneration by 3D scanning to generate scan data after gum regeneration may be further provided. In this case, the fixing abutment manufacturing step (S40) includes the step of manufacturing the fixing abutment 50 by 3D printing by additionally referring to the scan data after the gum regeneration along with the scan data before the gum regeneration. provide In addition, in the manufacturing of the permanent tooth prosthesis (S50), the step of manufacturing the permanent tooth prosthesis 60 by 3D printing by additionally referring to the scan data after the gum regeneration as well as based on the scan data before the gum regeneration. provide

In the 3D scan step after gum regeneration, 3D scan is performed using a scanner (not shown) capable of scanning the inside of the oral cavity, similarly to the 3D scan step (S30) before gum regeneration. The scan data after the gum regeneration includes information about the end 5 of the gum regenerated around the healing abutment 20 . In this case, the pre-gum regeneration scan data and the post-gum regeneration scan data are used together to manufacture a precise patient-customized fixing abutment 50 and permanent tooth prosthesis 60 that more accurately match the patient's regenerated gum line. . Therefore, durability of the fixing abutment 50 and the permanent dental prosthesis 60 installed on the patient is improved, and it is possible to give the patient a comfortable feeling without a sense of heterogeneity.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

1: alveolar bone 3: gum
10: fixture 20: healing abutment
21: base 31: abutment protrusion
50: abutment for fixation 60: permanent tooth prosthesis

Claims (5)

A fixture placement step of placing and fixing a fixture to the alveolar bone;
A fixture insertion part inserted into the fixture, an exposed part protruding out of the gum and exposed in the oral cavity, and a gum regeneration guide part between the fixture insertion part and the exposed part, and the light reflection of the exposed part is smaller than the light reflection of the metal. A healing abutment installation step of fixing and installing a healing abutment capable of 3 digit scan to the fixture;
a 3D scanning step before gum regeneration of generating scan data before gum regeneration by 3D scanning the healing abutment and its surroundings before the gum is regenerated around the healing abutment;
A fixation abutment manufacturing step of manufacturing a fixation abutment by 3D printing based on the scan data before gum regeneration; and
A permanent dental prosthesis manufacturing step of manufacturing a permanent dental prosthesis by 3D printing based on the scan data before gum regeneration;
In the dental implant treatment method using the 3D scan, after the 3D scan step before the gum regeneration, when the end of the gum is regenerated around the healing abutment, the end of the regenerated gum is 3D scanned to generate scan data after gum regeneration 3D scanning step after gum regeneration; further comprising,
The step of manufacturing the abutment for fixation includes a step of manufacturing the abutment for fixation by 3D printing based on the scan data before gum regeneration and additionally referring to scan data after gum regeneration,
The step of manufacturing the permanent tooth prosthesis comprises a step of manufacturing the permanent tooth prosthesis by 3D printing based on the scan data before gum regeneration and additionally referring to scan data after the gum regeneration. A method for manufacturing a permanent dental prosthesis using a scan. According to claim 1,
The step of manufacturing the abutment for fixation and the step of manufacturing the permanent tooth prosthesis are performed separately,
The step of installing the fixing abutment and the permanent tooth prosthesis includes a healing abutment removal step of removing the healing abutment from the fixture, a fixing abutment fixing step of fixing the fixation abutment to the fixture, and dental cement A method of manufacturing a permanent dental prosthesis using a scan using a 3D scan, characterized in that it comprises a permanent dental prosthesis fixing step of fixing the permanent dental prosthesis by covering the permanent dental prosthesis on the fixing abutment as a medium. According to claim 1,
The step of manufacturing the permanent dental prosthesis comprises forming a permanent dental prosthesis integrally coupled to the fixing abutment by laminating materials of the permanent dental prosthesis on the fixing abutment by 3D printing, Manufacturing method of permanent dental prosthesis using 3D scanning. According to claim 1,
The fixing abutment and the permanent dental prosthesis are made of the same material,
The method of manufacturing a permanent dental prosthesis using 3D scanning, characterized in that the manufacturing step of the abutment for fixing and the step of manufacturing the permanent dental prosthesis are performed together so that the abutment for fixing and the permanent dental prosthesis are integrally formed.
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