KR20040081320A - Method for treating a screw-cement retained prosthesis, abutment and implant for a screw-cement retained prosthesis - Google Patents

Abstract

PURPOSE: A screw/cement retained prosthesis and abutment, and a method for installing the prosthesis to the abutment are provided to take advantages of both the prosthesis and abutment while compensating their disadvantages, and to enable easy coupling and separation of the abutment and the prosthesis by way of inclined surfaces. CONSTITUTION: The method for installing a screw/cement retained prosthesis(150) to an abutment(120) comprises the steps of: providing the abutment having a lower coupling protrusion and a first screw hole; appropriately positioning and inserting the protrusion into a coupling groove of a fixture(110); fastening the abutment to the fixture using a screw corresponding to the first screw hole; providing the prosthesis having a second screw hole corresponding to the first screw hole; and coupling the prosthesis to the abutment by interposing a dental cement.

Description

METHODS FOR TREATING A SCREW-CEMENT RETAINED PROSTHESIS, ABUTMENT AND IMPLANT FOR A SCREW-CEMENT RETAINED PROSTHESIS}

The present invention relates to a dental implant, and more particularly, to a method for implantation of the implant is simple, easy to assemble and disassemble the implant, an implant abutment and implant using the method.

Dental implant refers to an artificial tooth structure or a method of dental surgery formed by planting artificial roots at partially or totally missing teeth and adhering to the alveolar bone and fixing prosthesis or crowns to the artificial roots. do. In general, implants include a fixture made of titanium, an abutment fixed on the fixture, an abutment screw securing the abutment to the fixture, and an abutment fixed to the abutment. It is composed of prosthesis as an artificial tooth.

The implant can be performed only on the lost part without damaging adjacent teeth or surrounding tissues around the lost tooth, supporting bone tissue, delaying the absorption of bone tissue and providing the same chewing power as natural teeth. And in appearance can form almost the same aesthetics as natural teeth.

Therefore, implants have recently been widely used as a dental procedure for repairing damaged or lost teeth.

Conventional implants can be divided into screw retained prosthesis (SRP) and cement retained prosthesis (CRP) according to the implant method.

Screw-Retained Prosthetics (SRP)

Screw-held prosthetics is a prosthetic method that has been used since implants were first developed and is still used today. Screw retained prostheses are basically fastened to the implant by the final prosthesis, and can be easily removed or replaced because the prostheses are joined by screws. There are two main types of prostheses. One is a prosthesis completed on top of the UCLA abutment, which is integrated with the UCLA abutment and directly connected to the fixture. The other is a transmucosal abutment, which is an intermediate abutment to the fixture. After connecting the upper abutment (gold cylinder) is connected to the upper abutment to create a final prosthesis with the intermediate abutment (transmucosal abutment) is mounted and detached.

Figure 1a is a cross-sectional view showing a screw retained prosthesis using a conventional UCLA abutment.

Referring to FIG. 1A, the screw-type prosthesis 10 using the UCLA abutment is integral with the fixture 12 and the prosthesis 18 placed in the alveolar bone and is disposed on the abutment 12. 14). Prosthesis 18 and abutment 14 are integrally formed from the outside, and a hole penetrating the center is formed.

The screw 16 is fastened to the fixture 12 through a hole, whereby the prosthesis 18 and the abutment 14 are fixed to the fixture 12.

1B is a cross-sectional view showing a screw retained prosthesis using a conventional intermediate abutment.

Referring to FIG. 1B, the screw retained prosthesis 20 using the intermediate abutment is integral with the fixture 22, the intermediate abutment 24 and the prosthesis 28 and on the intermediate abutment 24. An upper abutment 26 disposed. The intermediate abutment 24 includes a hole corresponding to the first screw 23, and the first screw 23 is engaged with the fixture 22 through the intermediate abutment 24, thereby making it an intermediate abutment. Fix 24 to the fixture 22.

The second screw 25 is inserted through the hole passing through the prosthesis 28 and the upper abutment 26, and the second screw 25 is engaged with the screw hole formed in the upper portion of the first screw 23. The prosthesis 28 and the upper abutment 26 are secured to the intermediate abutment 24.

As shown in FIGS. 1A and 1B, the bottom of the final prosthesis 18, 28 is a ready-made part (eg UCLA abutment 14, upper abutment 26) that fits into the fixture or intermediate abutment top shape. )) Are inherent, and they form together to form the prosthesis when casting the prosthesis.

The biggest feature of the screw-type prosthesis is that a screw hole is formed in the occlusal surface of the prosthesis, and the screw hole can control the coupling between the screw and the fixture. Therefore, the screw retained prosthesis has the following advantages.

First, even after the prosthesis is completed and mounted in the oral cavity, the prosthesis can be easily removed and remounted when necessary.

If the prosthesis breaks unexpectedly and requires repair or replacement while using an implant prosthesis, the connected screw loosens itself and needs to be tightened, or if the patient has been treated with an implant, or if you feel uncomfortable with a prosthesis with multiple implants If some of the fixtures fail, the prosthesis must be removed from the fixture to facilitate repair and remounting.

Screw retained prostheses can be used to remove prostheses very conveniently in these cases: the prosthesis can be removed without damage by unscrewing the screw through the screw hole, and refitted by tightening the screw.

Second, screw-type prostheses can be used even if the distance between the antagonist teeth is narrow. For example, a prosthesis can be made using UCLA abutments even if the distance between the implant and the antagonist is about 5 mm or more.

However, screw retained prostheses have fatal drawbacks instead of meeting these essential requirements.

Threaded prostheses must be machined precisely to near perfection, as the prosthesis must make a passive fit with the fixture, the underlying structure. Therefore, the thread-retaining prosthesis may be complicated in fabrication technique and excessively expensive in manufacturing time and manufacturing cost.

In addition, if not fully machined and mounted, several stresses may be applied to the implant, and excessive stresses often result in loss of bone around the implant or fracture of the prosthesis or the implant itself.

A frequently occurring problem in threaded prostheses is the loosening of the screw. Some reports indicate that screw loosening occurs in about 25-30% of prosthetic implant prostheses. In other words, the implant prosthesis that does not fit well is easier to loosen due to the permanent extension of the screw with less bite force compared to the fit.

In order to solve the above problem, the screw retained prosthesis must be fixed by manual fitting. In order to produce a passive fit prosthesis in the oral cavity, first, a precise working model must be made, and a precise prosthesis must be produced thereon.

In order to make accurate and precise work model, precise impression making, precise work model production and precise prosthesis production must be performed. However, considering the shrinkage and deformation of the material, such work requires a high degree of skill, and due to the nature of the manufacturing process requires quite a lot of treatment time and manufacturing time. Therefore, not only the treatment cost but also the manufacturing cost is high, and the material cost is also formidable. Therefore, the screw retained prosthesis is expensive overall.

Cement Retained Prosthetics (CRP)

Conventional cement retaining prostheses (CRP), unlike screw retaining, secure the cemented abutment to the implant fixture by screws, and place the final prosthesis fabricated separately over the fixed abutment, between It refers to the method of bonding the final prosthesis and abutment through the cement.

2 is a cross-sectional view showing a conventional cement retaining prosthesis.

Referring to FIG. 2, a conventional cement retaining prosthesis 30 includes a fixture 32, a cemented abutment 34, and a prosthesis 38. An abutment 34 having a screw hole is disposed in the fixture 32 placed in the alveolar bone, and the abutment 34 is fixed by fastening the screw 36 to the fixture 32 through the screw hole. .

The prosthesis 38 is inserted into the fixed abutment 34, and the abutment 34 and the prosthesis 38 are bonded to each other via dental cement therebetween. Unlike the screw-held prosthesis, the prosthesis 38 is manufactured separately from the abutment 34, and then the prosthesis 38 and the abutment 34 are bonded using dental cement.

Thus, the most apparent feature of conventional cement-maintained prostheses is that there is no screw hole in the occlusal surface of the prosthesis. Therefore, unlike the screw-held prosthesis, the appearance of artificial teeth is inconspicuous in appearance and can form a natural appearance like natural teeth, but once the prosthesis is mounted, the prosthesis cannot be separated by loosening the screw.

Cement retaining prostheses solve all of the disadvantages of screw retaining. In other words, cement retained prostheses can easily make a passive fit between the fixture and the prosthesis, resulting in a reduction in stress on the fixture when connecting the prosthesis, and 3) loosening of the screw. Less frequently, 4) simpler clinical procedures and manufacturing processes, 5) time savings, and 6) less production costs.

Above all, the greatest advantage of cement retained prostheses is that the incompatibility between the prosthesis and the abutment can simply be solved by the space between the prosthesis and the abutment and the dental cement filled in the space. Compared with the screw retaining type, which requires a high degree of precision, the cement retaining prosthesis is simple to raise or pore if only a few principles are adhered to, and a passive fit between the implant and the prosthesis can be achieved.

For these reasons, cement retaining types are now more preferred than screw retaining types.

However, as already mentioned, cement-maintained prostheses have the disadvantage that they are not easy to separate and refit. The only way to separate a prosthesis from a cement retainer is to remove it from the implant by external force. For example, in the case of a single cement retaining prosthesis, the screw may be loosened frequently. In this case, even if temporary cement is used, it is almost impossible to remove the prosthesis without damaging the thread or the prosthesis. If the prosthesis of which a plurality of implants are integrated, the holding force is increased by a plurality of abutments, which makes the removal of the prosthesis more difficult.

Another problem with cement-maintained prostheses is that the procedure is difficult if the distance between the jaws is insufficient. In fact, there are many cases where the distance between the vices is not enough. In this case, the cement retaining type shortens the length of the abutment, and if the abutment is too short, the holding force decreases, so the prosthesis may fall off.

In addition, another problem of the cement retaining type is that it is difficult to completely remove the cement remaining in the oral cavity after the prosthesis is cemented. Failure to completely remove the remaining cement can cause gingival inflammation around the implant in the long run, causing the implant to fail.

If a conventional implant can be classified into a screw retained prosthesis (SRP) and a cement retained prosthesis (CRP) according to the procedure, the conventional implant can be divided into an externally implantable implant and an internally implantable implant. It can be divided into (internal implant).

As shown in FIGS. 1A, 1B, and 2, a coupling protrusion is formed at an upper end of the fixtures 12, 22, and 32, and the abutment 14, 24, 34 accommodates the coupling protrusion. Having an externally coupled implant.

On the contrary, in the internally coupled implant, a coupling protrusion is formed at the lower end of the abutment and includes a coupling groove for accommodating the coupling protrusion at the top of the fixture.

3 is a cross-sectional view illustrating a conventional internally coupled implant. In FIG. 3, two types of internally coupled implants are shown, labeled (a) and (b), respectively, and belong to cement-retaining prostheses (CRP).

Referring to FIG. 3A, the internally coupled implant is composed of a fixture 42, an internally coupled abutment 44, a screw 46, and a prosthesis 48. The fixture 42 includes a coupling groove at an upper end thereof, and the abutment 44 includes a coupling protrusion 45 corresponding to the coupling groove. Coupling protrusion 45 is formed at the lower end of the body of the abutment 44, the upper portion of the body is formed with a bonding portion is bonded to the prosthesis 48 by dental cement.

The coupling groove of the fixture 42 includes a conical column-shaped groove located at the inlet side and a hexagonal column-shaped groove formed at the bottom thereof, and the coupling protrusion 45 of the abutment 44 is in the shape of the coupling groove. Correspondingly, the contact portion 45a has a conical pillar shape and a rotation preventing portion 45b having a hexagonal pillar shape. As the engaging protrusion 45 of the abutment 44 is inserted into the fixture 42, the contact part 45a supports the body of the abutment 44, and the rotation preventing part 45b is located below the coupling groove. And prevent the abutment 44 from rotating relative to the fixture 42.

However, since the rotation preventing portion 45b is formed in the shape of a hexagonal column, an octagonal pillar, or other polygonal pillars, the abutment 44 must be a shaft in order to separate the rotation preventing portion 45b from the fixture 42. Retreat in the direction.

Referring to FIG. 3B, the internally coupled implant is composed of a fixture 52, an internally coupled abutment 54, a screw 56, and a prosthesis 58. The fixture 52 includes a coupling groove at an upper end thereof, and the abutment 54 includes a coupling protrusion 55 corresponding to the coupling groove. A coupling protrusion 55 is formed at the lower end of the body of the abutment 54, and an upper portion of the body is formed at the upper portion of the abutment 54 to be bonded to the prosthesis 58 by dental cement.

In the conventional fixture 52, the coupling groove is formed as a cylindrical columnar groove having a cylindrical or polygonal cross section, and the coupling protrusion 55 of the abutment 54 corresponding thereto is also formed in a cylindrical or prismatic shape. In particular, in the case of using a cylindrical engaging projection, projections or grooves may be used to limit rotation between the engaging projection and the engaging groove.

In the structure of the internally coupled implant shown in FIG. 3 (b), since the engaging protrusion and the engaging groove are formed in a columnar shape, the abutment 54 is used to separate the engaging protrusion 55 from the fixture 52. ) Must be retracted in the axial direction, and the distance to move only in the axial direction is also quite long.

As described above, in summary, the advantages and disadvantages of screw retaining and cement retaining prostheses, screw retaining is free to attach and detach prostheses and can be used for narrow interdental distances, but it is difficult to achieve manual precise fitting and loosening of screws. Frequently, precise clinical and laboratory procedures are required, and cost and time are disadvantageous.

On the other hand, cement retaining type has many advantages such as easy manual fit, simple clinical and pore process, less time and cost, but once the prosthesis and abutment are bonded, the prosthesis can be easily Because of the inability to separate, it is difficult to repair the prosthesis, it is difficult to remove the residual cement in the oral cavity, and if the margin with the prosthesis does not match the disadvantages can not be polished.

Accordingly, one object of the present invention is to provide a third prosthetic method that can select and remedy the advantages of both prosthetic methods, and apply this method to an internally coupled implant structure. In other words, the clinical and pore process is simple, manual and easy to obtain the passive fit with less time and cost, it is not easy to loosen the screw, can be applied in the narrow gap between the jaw, easy to repair and repair the prosthesis, It is to provide an implant treatment method and abutment that can easily remove residual cement from swallowing, polish the margin of the prosthesis, and detach and refit the prosthesis at any time without damage.

In addition, another object of the present invention is to provide an implant treatment method and abutment that can be easily mounted and detached even if the axis between the fixture and the abutment does not exactly match.

Figure 1a is a cross-sectional view showing a screw retained prosthesis using a conventional UCLA abutment.

1B is a cross-sectional view showing a screw retained prosthesis using a conventional intermediate abutment.

2 is a cross-sectional view showing a conventional cement retaining prosthesis.

3 is a cross-sectional view illustrating a conventional internally coupled implant.

4 is a cross-sectional view of an SCRP implant according to a first embodiment of the present invention.

5A to 5E are cross-sectional views illustrating a method of treating an SCRP implant according to a first embodiment.

6 is a cross-sectional view of an SCRP implant according to a second embodiment of the present invention.

7 is a cross-sectional view illustrating a separation process of an SCRP implant according to a second embodiment.

8 is a cross-sectional view of an SCRP implant according to a third embodiment of the present invention.

9 is a cross-sectional view illustrating a separation process of an SCRP implant according to a third embodiment.

10 is a cross-sectional view of an SCRP implant according to a fourth embodiment of the present invention.

11 is a cross-sectional view for explaining a separation process of an SCRP implant according to a fourth embodiment.

12 is a cross-sectional view of an SCRP implant according to a fifth embodiment of the present invention.

FIG. 13 is a cross-sectional view illustrating a separation process of an SCRP implant according to a fifth embodiment. FIG.

14 is a cross-sectional view of an SCRP implant according to a sixth embodiment of the present invention.

15 is a plan view illustrating a fixture in an SCRP implant according to a sixth embodiment.

16 is a sectional view of an SCRP abutment according to another embodiment similar to the sixth embodiment.

17 is a top view of the fixture shown in FIG. 16.

18 is an exploded perspective view of an SCRP implant according to a seventh embodiment of the present invention.

19 is a cross-sectional view for explaining a process of detaching an SCRP implant according to a seventh embodiment.

20 is an exploded perspective view illustrating an SCRP implant and an abutment used according to an eighth embodiment of the present invention.

21 is an exploded perspective view illustrating an SCRP implant and abutment according to another embodiment similar to the eighth embodiment of the present invention.

22A is a cross-sectional view of an SCRP implant according to a ninth embodiment of the present invention.

22B is a cross-sectional view illustrating a separation process of an SCRP implant according to a ninth embodiment.

<Explanation of symbols for the main parts of the drawings>

100: SCRP implant 110: Fixture

112: coupling groove 114: screw thread

116 ： Contact groove 118 ： Rotation prevention groove

120,220,320 ： Abutment 124,224,324 ： First screw hole

130,230,330 ： Joint projections 132,232,332 ： Contact

134,234,334 ： Rotating prevention part 136,236,336 ： Induction slope

140: screw 150: prosthesis

154 ： Second screw hole

According to a preferred embodiment of the present invention for achieving the above objects, it provides an abutment including a first screw hole is formed in the lower portion and a coupling protrusion formed in the lower portion in the method of the screw / cement retaining implant After repositioning the coupling protrusion in the coupling groove formed in the upper portion of the fixture corresponding to the coupling protrusion, the abutment is bound to the fixture using a screw corresponding to the first screw hole. Next, a prosthesis including a second screw hole formed corresponding to the first screw hole is provided, and the prosthesis and abutment are bonded using dental cement to perform a screw / cement retaining implant.

The method for the treatment of a screw / cement-holding implant according to the present invention relates to an internally-coupled implant that fixes and inserts the abutment's engaging protrusion into the fixture, since the prosthesis and abutment are cemented using dental cement. It is a feature of cement retained prostheses (CRP) and also includes features of screw retained prostheses (SRP) because the screws can be tightened or loosened through the first and second screw holes. In other words, since the abutment before fastening with the prosthesis is fastened to the fixture, the prosthesis can be covered with the abutment and cemented, allowing manual precision fitting, and the procedure is quick, like cement-maintained implants. And simple. In addition, since the second screw hole is formed in the prosthesis to loosen and tighten the screw, the prosthesis can be easily detached from the fixture even after being joined. Therefore, there is no burden on separation even if permanent cement is used as dental cement.

The implant treatment method according to the present invention applies both the advantages of the screw retaining type and the cement retaining type and solves the disadvantages of each method, and may be referred to as a screw-cement retained prosthesis or a screw / cement retaining implant. . This is referred to as an SCRP implant.

Specifically, in the method of SCRP implant, the prosthesis is applied before the prosthesis and abutment are bonded using dental cement. The prosthesis of the prosthesis is a process for determining whether the prosthesis is suitable for the abutment. The prosthesis and abutment are matched with each other without dental cement, and the prosthesis and abutment are checked.

In addition, before joining the prosthesis and abutment, the first screw hole may be filled with an auxiliary filler such as a gauze or cotton ball. This is because dental cement, such as permanent cement, may enter the first screw hole in the bonding process to block the first screw hole, and an auxiliary filler may be used to prevent it.

Unlike cement-retaining implants (CRP), prostheses and abutments with SCRP implants can be easily separated from the fixture even after cementation. Since the prosthesis and abutment can be separated by loosening the screw through the second screw hole, the remaining cement after the bonding process can be neatly removed, and the edge of the prosthesis can be polished to complete the implant procedure.

According to another preferred embodiment of the present invention for solving the above problems, after the internally coupled abutment including the first screw hole is coupled to the fixture and the implant is bonded to the abutment, And forming a second screw hole in the prosthesis corresponding to the first screw hole, and releasing the screw through the first and second screw holes to separate the mutually bonded prosthesis and abutment from the fixture. A cement retaining implant procedure is provided.

Since the second screw hole corresponding to the first screw hole is not formed at the time of bonding of the prosthesis, a clean appearance can be formed even after the procedure, and the patient can be satisfied to the maximum. In addition, since the second screw hole can be formed in the prosthesis using a fine drill or the like, it may have the same advantages of the SCRP implant. Therefore, the SCRP implant accordingly can provide a beautiful aesthetic after the initial procedure and can form a good occlusion. In the case where replacement or repair is necessary later, the second protruding hole can be simply formed to separate the prosthesis and the abutment.

The method of SCRP implant may be particularly useful when using the SCRP abutment described later, and a mark for easily finding the second screw hole may be displayed on the prosthesis.

According to one preferred embodiment of the present invention for achieving the above objects, the SCRP abutment according to the present invention is a kind of cement-maintained implant abutment used for internal fixture, the body of the abutment And a coupling protrusion formed under the body.

The body of the abutment includes a screw hole formed to penetrate the upper and lower portions of the abutment portion to be bonded to the prosthesis. In general, the shape or structure of the cemented portion and the screw hole can be variously changed with reference to the shape and structure of the cement retained abutments used in the existing internally coupled implants.

The lower portion of the body is formed with a coupling protrusion which is integral with the body. The engaging projection includes a close contact portion and a rotation preventing portion, and is formed to penetrate the close contact portion and the anti-rotation screw hole formed in the body. The close contact portion and the anti-rotation portion may be formed separately from each other, but the close contact portion and the anti-rotation portion may be integrally formed, such as a coupling protrusion having a pillar shape. The contact part supports the body of the abutment by contacting the whole or part of the coupling groove formed at the upper part of the fixture, and the anti-rotation part is formed adjacent to the contact part so that the abutment restricts rotation with respect to the fixture. To guide the setting. Generally, the anti-rotation part is formed in a hexagonal pillar or an octagonal pillar shape, but may be formed in various shapes in a non-circle having a coupling protrusion on a polygonal pillar, a polygonal pyramid or a cylindrical pillar.

In particular, the coupling protrusion in the SCRP abutment according to the present invention includes an inclined surface formed by partially losing the contact portion or the anti-rotation portion. The inclined surface may provide a space between the engaging projection and the coupling groove during the engagement between the abutment and the fixture, and the prosthesis and the abutment bonded to each other by the free space may be easily separated from the fixture.

The SCRP abutment structure according to the present invention can be usefully used when a plurality of abutments are integrally bonded to one prosthesis. For example, when a plurality of fixtures are placed in the alveolar bone, it is common that the plurality of fixtures are generally inclined at an angle to each other.

However, the prosthesis-abutment coalescing formed using the conventional abutment of the internally coupled implant does not have sufficient free space between the abutment and the fixture. Thus, when separating the abutment from the fixture, the abutments must be separated from each other in each axial direction, but the prosthesis-abutment coalescing is separated from the fixture because the axial directions of the abutments are not parallel to each other. It may not be possible and may partially damage the prosthetic structure of the patient stably performed in the process of forcibly separating the composite.

However, the SCRP prosthetic structure formed using the abutment according to the present invention can be easily separated from the fixture using the free space provided by the inclined surface, and easily repositioned using the anti-rotation part. I can do it. That is, when separating the fixture from the fixture, the engaging projection of the abutment is released from the engaging groove, the engaging projection can move within the range of the free space, a plurality of engaging projections smoothly from the fixture along the guide slope Can be separated.

As already mentioned, the SCRP abutments according to the invention basically have a structure similar to the abutments used for internal implants in cement-retaining prostheses (CRP). However, in the present SCRP abutment, the engaging projection is characterized in that it has an inclined surface formed by partially losing the contact portion or the rotation preventing portion.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the following embodiments.

Example 1

4 is a cross-sectional view of the SCRP implant according to the first embodiment of the present invention, Figures 5a to 5e are cross-sectional views for explaining the method of the SCRP implant according to the first embodiment.

Referring to FIG. 4, the SCRP implant 100 according to the first embodiment includes a fixture 110, an abutment 120, a screw 140, and a prosthesis 150.

The fixture 110 includes a thread 114 formed on an outer surface, and the fixture 110 is placed in the alveolar bone along the thread 114. The thread 114 of the implanted fixture 110 is fixed to the alveolar bone by fusing with the tissue of the alveolar bone. In general, it takes a considerable period of time for the thread 114 and the alveolar tissue to fuse together.

A coupling groove 112 for accommodating the coupling protrusion 130 of the abutment 120 is formed on an upper surface of the fixture 110. Coupling groove 112 has a circular inlet, and includes a concave column shape, that is, fallopian tube-shaped close contact grooves 116 from the inlet, the lower end of the close contact groove 116 has a predetermined depth of rotation prevention groove ( 118 is formed in a hexagonal column or an octagonal column shape. A female screw hole corresponding to the screw 140 is formed at the center of the lower end of the rotation preventing groove 118.

The abutment 120 according to the first embodiment includes a body 122 and a coupling protrusion 130, and a first screw hole 124 is formed through the body 122 and the coupling protrusion 130. .

Abutment portion 126 is formed on the upper outer surface of the body 122. The outer surface of the cemented portion 126 and the inner surface of the framework of the prosthesis 150 are formed to correspond to each other, but unlike the case of the screw-held prosthesis (SRP), the inner surfaces of the cemented portion 126 and the prosthesis 150 are precise. It does not have to match. That is, there is a relatively movable space between the abutment 120 and the prosthesis 150 in the implant according to the present embodiment, the passive bonding is possible, and between the abutment 120 and the prosthesis 150 The abutment 120 and the prosthesis 150 may be firmly fixed by the dental cement 160 interposed therebetween even if it does not exactly match. In addition, the structure of the body or the shape of the joint portion may be designed with reference to the cement retaining abutments of the existing internally coupled implants, some of them may be selected and used.

The abutment 120 includes a coupling protrusion 130 formed at a lower portion of the body 122 to correspond to the coupling groove 112 of the fixture 110. Coupling protrusion 130 includes a close contact portion 132 and the anti-rotation portion 134 corresponding to each of the close contact groove 116 and the anti-rotation groove 118 of the coupling groove 112. The close contact portion 126 is formed at the lower end of the body 122 and is formed in a conical column shape corresponding to the close contact groove 116. The anti-rotation part 134 is formed extending from the lower end of the close contact portion 132 and is formed in a hexagonal column shape corresponding to the anti-rotation groove 118 of the coupling groove 112. As the coupling protrusion 130 of the abutment 120 is inserted into the coupling groove 112, the adhesion part 132 contacts the adhesion groove 116 in whole or in part to support the abutment 120. The anti-rotation part 134 maintains a constant direction in which the abutment 120 is fixed by the anti-rotation groove 118, and assists in always repositioning the abutment 120.

As shown in FIG. 4, the lower end of the anti-rotation part 134 is partially lost to form a tapered guide slope 136. The anti-rotation part 134 remaining in the hexagonal column shape at the top of the inclined slope 136 is to maintain a constant direction in which the abutment 120 is fixed, and the height of the remaining anti-rotation part 134 is In general, even when formed in the range of about 1mm, preferably in the range of about 0.3 ~ 0.4mm it can sufficiently perform the anti-rotation function.

A first screw hole 124 is formed at the center of the abutment 120, and the screw 140 is fastened to the female screw hole of the fixture 110 through the first screw hole 124, thereby making the abutment 120. ) And fixture 110 are bound to each other.

In addition, unlike the conventional cement retaining prosthesis, the prosthesis 150 of the SCRP implant 100 includes a second screw hole 154. The prosthesis 150 is made of a metal framework and a layer structure of porcelain (porcelain) only or the metal itself, and the prosthesis 150 corresponds to the first screw hole 124 to correspond to the second screw hole 154. Is formed. The second screw hole 154 is not used to initially fix the abutment 120 to the fixture 110, but the fixture abutment 120 and the prosthesis 150 are fixed to the fixture 110. It is used for the purpose of separating from or remounting the fixture 110.

Hereinafter, a method of treating the SCRP implant 100 will be described with reference to the accompanying drawings.

Referring to FIG. 5A, two fixtures 110 are implanted in the alveolar bone, and the fixtures 110 are not in parallel with each other but are inclined to each other by a predetermined angle. Accordingly, the coupling grooves 112 formed at the upper end of the fixture 110 also face different directions. In addition, the coupling groove 112 includes a conical pillar-shaped contact groove 116 and the hexagonal pillar-shaped rotation preventing groove 118.

Referring to FIG. 5B, abutments 120 for SCRP implants are fixed to two fixtures 110, respectively. The coupling protrusion 130 of the abutments 120 is inserted into the coupling groove 112 of the fixture 110, and the screw 140 is fastened to the fixture 110 through the first screw hole 124. While fixing the abutment 120 to the fixture (110).

Referring to Figure 5c, there is provided a prosthesis 150 made to fit the patient's dentition. The prosthesis 150 is formed by casting a framework in accordance with a conventional method, and the second screw hole 154 is formed like a framework. A metal chimney may be formed to the occlusal surface to prevent fracture of the material, but in some cases, metal free holes may not be used around the second screw hole 154 for aesthetics. ). The framework of the prosthesis 150 is adjusted to be passive fit in response to the abutment 120, and each forms an inner surface corresponding to the abutment.

Referring to FIG. 5D, the prosthesis 150 and the abutment 120 are bonded between the prosthesis 150 and the abutment 120 through the permanent cement 160.

Before bonding the abutment 120, the prosthesis 150 can be tried. When the prosthesis 150 is tried, the abutments 120 may be repositioned to the fixture 110 one by one without the prosthesis 150. In this case, the abutment 120 may be connected at an accurate position and angle by using the rotation preventing unit 134 of the coupling protrusion 130. If there is no anti-rotation part, the abutment may be rotated even a little and connected at different angles, and as a result, the already manufactured prosthesis 150 may be inappropriate. When the prosthesis 150 is tried, the tightening and loosening of the screw 140 can be controlled through the second screw hole 154, and the prosthesis 150 is seated on the abutment 120 without any resistance and the margin is reduced. The shape of the abutment 120 may be adjusted until it is perfectly fitted.

After adjusting the fit between the abutment 120 and the prosthesis 150 through the pore of the prosthesis 150, a gauze or cotton is applied to the first screw hole 124 of the abutment 120. Fill it in. The reason for filling the auxiliary filler such as gauze or cotton is to prevent cement from entering the first screw hole 124 and blocking the first screw hole 124 during the bonding of the abutment 120. .

Then, the permanent cement 160 is interposed between the abutment 120 and the prosthesis 150, and then the abutment 120 and the prosthesis 150 are bonded. Resin luting cement or the like may be used as the permanent cement 160. As the permanent cement 160 hardens over a certain time, the abutment 120 and the prosthesis 150 are firmly bonded.

Referring to FIG. 5E, after the abutment 120 and the prosthesis 150 are bonded together, the auxiliary filler filled in the first screw hole 124 is removed. The abutment 120 and the prosthesis 150 can then be separated from the fixture 110 by releasing all screws 140 through the first and second screw holes 124, 154. 120 is bonded to the prosthesis 150 to form an integral prosthesis.

Unlike the conventional cement-retaining prosthesis (CRP), the prosthetic portion can be easily separated even after the abutment 120 and the prosthesis 150 are bonded. This is because all of the screws 140 can be removed through the second screw hole 154, and the structure is provided with a spare space inside the improved abutment 120.

When comparing the abutments shown in FIGS. 3 and 4 again, the engaging protrusion 130 of the abutment 120 according to the present embodiment includes a short anti-rotation part 134 and an induction inclined surface 136. . Therefore, as shown in Figure 5e, the free space is formed between the coupling protrusion 130 and the coupling groove 112, even if the coupling protrusion 130 may move a little from the coupling groove 112, induction slope The engaging projection 130 can be moved along the inner surface of the close contact groove 116 by the (136). However, when the abutment shown in FIG. 3 is operated under the same conditions as in FIG. 5E, since the abutments can be separated only by moving in different directions, a substantially integral prosthetic part cannot be separated from the fixture. .

Referring back to FIG. 5E, after removing the prosthetic part composed of the abutment 120 and the prosthesis 150, residual cement around the abutment 120 and the gum may be removed, and the margin of the prosthesis 150 may be removed. The fineness can be finely adjusted by grinding.

In the final finish, the prosthetic part is inserted into the oral cavity and fixed to the fixture 110 with the screw 140, and the second screw hole 154 is filled with a synthetic resin or ceramic material to close the second screw hole 154. Complete the procedure for SCRP implants.

Example 2

6 is a cross-sectional view of the SCRP implant according to the second embodiment of the present invention, Figure 7 is a cross-sectional view for explaining the separation process of the SCRP implant according to the second embodiment.

Referring to FIG. 6, the SCRP implant according to the second embodiment includes a fixture 110, an abutment 220, a screw 140, and a prosthesis 150. For the fixture 110, the screw 140, and the prosthesis 150 except for the abutment 220, reference may be made to the description and drawings of the first embodiment, and repeated descriptions may be omitted.

Fixture 110 includes a coupling groove 112 and a thread 114, the coupling groove 112 includes a concave column-shaped contact groove 116 and the rotation preventing groove 118. A female screw hole corresponding to the screw 140 is formed at the center of the lower end of the rotation preventing groove 118.

Similar to the first embodiment, the abutment 220 according to the present embodiment includes a body 222 and a coupling protrusion 230, and the first screw hole 224 has a body 222 and a coupling protrusion 230. It is formed through), the bonding portion 226 is formed on the upper outer surface of the body 222.

The abutment 220 includes a coupling protrusion 230 formed in the lower portion of the body 222 to correspond to the coupling groove 112 of the fixture 110. Coupling protrusion 230 includes a close contact portion 232 and the rotation preventing portion 234. The close contact portion 226 is formed at the lower end of the body 222 and is formed in a conical column shape corresponding to the close contact groove 116. The anti-rotation part 234 is formed to extend from the lower end of the close contact portion 232 and is formed in a hexagonal column shape corresponding to the anti-rotation groove 118. As the coupling protrusion 230 of the abutment 220 is inserted into the coupling groove 112, the adhesion part 232 supports the abutment 220 in total or partial contact with the adhesion groove 116. The anti-rotation part 234 maintains a constant direction in which the abutment 220 is fixed by the anti-rotation groove 118 and assists in always repositioning the abutment 220.

As shown in FIG. 6, the inclined slope 236 according to the present embodiment is different from the inclined slope 136 of the first embodiment. While the inclined surface 136 of the first embodiment is formed at 360 at the lower end of the anti-rotation part 134, the inclined surface 236 of the present embodiment is partially tapered because the half of the anti-rotation part 234 is partially lost. A tapered inclined surface 236 is formed. Therefore, a part of the hexagonal column shape corresponding to about 180 of the anti-rotation part 234 remains, and the direction in which the abutment 120 is sufficiently fixed even by using the anti-rotation part 234 can be kept constant. have. At this time, the inclined surface 236 is preferably formed at an angle or more than the cone angle of the contact portion 232, the height of the anti-rotation portion 234 is not limited within the depth of the anti-rotation groove 118.

A first screw hole 224 is formed at the center of the abutment 220, and the abutment 120 is formed by fastening the screw 140 to the female screw hole of the fixture 110 through the first screw hole 224. ) And fixture 110 are bound to each other.

Referring to FIG. 7, two fixtures 110 are placed on the alveolar bone, not parallel to each other, and inclined to each other, and the abutments 220 for SCRP implants are fixed to the two fixtures 110, respectively. The prosthesis 150 and the abutment 220 are bonded by the permanent cement 160 interposed between the prosthesis 150 and the abutment 220.

Here, the first and second screw holes 224 and 154 may loosen all the screws 140, and release the screws 140 to separate the abutment 220 and the prosthesis 150 from the fixture 110. can do. At this time, the abutment 220 is bonded to the prosthesis 150 to form an integral prosthetic portion.

In the prosthetic part according to the present embodiment, the two abutments 220 are disposed such that the inclined slopes 236 face each other. Accordingly, a free space is formed between the coupling protrusion 230 and the coupling groove 112, and the coupling protrusion 230 may escape from the coupling groove 112 without being caught by the guide inclined surface 236.

As in the first embodiment, after removing the prosthetic portion composed of the abutment 220 and the prosthesis 150, residual cement around the abutment 220 and the gum may be removed, and the margin of the prosthesis 150 may be removed. The fineness can be finely adjusted by grinding.

Example 3

8 is a cross-sectional view of the SCRP implant according to the third embodiment of the present invention, Figure 9 is a cross-sectional view for explaining the separation process of the SCRP implant according to the third embodiment.

Referring to FIG. 8, the SCRP implant according to the third embodiment includes a fixture 110, an abutment 320, a screw 140, and a prosthesis 150. For the fixture 110, the screw 140, and the prosthesis 150 except for the abutment 320, reference may be made to the description and the drawings of the first embodiment, and repeated content may be omitted.

Fixture 110 includes a coupling groove 112 and a thread 114, the coupling groove 112 includes a concave column-shaped contact groove 116 and the rotation preventing groove 118. A female screw hole corresponding to the screw 140 is formed at the center of the lower end of the rotation preventing groove 118.

Like the first embodiment, the abutment 320 according to the present embodiment includes a body 322 and a coupling protrusion 330, and the first screw hole 324 has a body 322 and a coupling protrusion 330. It is formed through), and the bonding portion 326 is formed on the upper outer surface of the body 322.

The abutment 320 includes a coupling protrusion 330 formed in the lower portion of the body 322 to correspond to the coupling groove 112 of the fixture 110. Coupling protrusion 330 includes a close contact portion 332 and the rotation preventing portion 334. The close contact portion 326 is formed at the lower end of the body 322 and is formed in a conical column shape corresponding to the close contact groove 116. The anti-rotation part 334 is formed extending from the lower end of the close contact portion 332 and is formed in a hexagonal pillar or octagonal pillar shape corresponding to the anti-rotation groove 118. As the coupling protrusion 330 of the abutment 320 is inserted into the coupling groove 112, the adhesion part 332 contacts the adhesion groove 116 in whole or in part to support the abutment 320. The anti-rotation part 334 maintains a constant direction in which the abutment 320 is fixed by the anti-rotation groove 118, and assists to always reposition the abutment 320.

As shown in FIG. 8, the inclined slope 336 according to the present embodiment is different from the inclined slope 236 of the second embodiment. While the induction inclined surface 236 of the second embodiment lost only half of the anti-rotation part 134, the induction inclined surface 336 of the present embodiment had half of both the tight contact part 332 and the anti-rotation part 334. It is partially lost to form a tapered guide slope 336. However, in order for the close contact 332 to stably support the abutment 320, at least a part of the upper end of the close contact 332 must be maintained in an intact conical column shape. At this time, the length of the portion in contact with the inner surface of the contact groove 116 is different depending on the angle of the cone, but preferably maintains about 1 to 3mm.

A first screw hole 324 is formed at the center of the abutment 320, and the abutment 120 is formed by fastening the screw 140 to the female screw hole of the fixture 110 through the first screw hole 324. ) And fixture 110 are bound to each other.

Referring to FIG. 9, two fixtures 110 are placed on the alveolar bone without being parallel to each other, and the SCRP implant abutments 320 are fixed to the two fixtures 110, respectively. The prosthesis 150 and the abutment 320 are bonded by the permanent cement 160 interposed between the prosthesis 150 and the abutment 320.

Here, all the screws 140 may be loosened through the first and second screw holes 324 and 154, and the screws 140 may be loosened to separate the abutment 320 and the prosthesis 150 from the fixture 110. can do. At this time, the abutment 320 is bonded to the prosthesis 150 to form an integral prosthetic portion.

As in the second embodiment, in the present embodiment, the two abutments 320 are disposed such that the inclined slopes 336 face each other. Accordingly, a free space is formed between the coupling protrusion 330 and the coupling groove 112, and the coupling protrusion 330 may be separated from the coupling groove 112 without being caught by the guide inclined surface 336.

As in the previous embodiment, after removing the prosthetic part composed of the abutment 320 and the prosthesis 150, residual cement around the abutment 320 and the gum can be removed, and the margin of the prosthesis 150 can be removed. Polishing can be finely controlled.

Example 4

10 is a cross-sectional view of the SCRP implant according to the fourth embodiment of the present invention, Figure 11 is a cross-sectional view for explaining the separation process of the SCRP implant according to the fourth embodiment.

Referring to FIG. 10, the SCRP implant 400 according to the fourth embodiment includes a fixture 410, an abutment 420, a screw 440, and a prosthesis 450.

The fixture 410 includes a thread 414 formed on the outer surface, and the fixture 410 is placed in the alveolar bone along the thread 414. A coupling groove 412 for receiving the coupling protrusion 430 of the abutment 420 is formed on the upper surface of the fixture 410. Coupling groove 412 has a polygonal inlet, such as hexagonal, octagonal, etc., is formed in a columnar shape having the same cross section as the inlet. A female screw hole corresponding to the screw 440 is formed at the center of the lower end of the coupling groove 412.

The abutment 420 according to the fourth embodiment includes a body 422 and a coupling protrusion 430, and a first screw hole 424 is formed through the body 422 and the coupling protrusion 430. .

A joining portion 426 is formed on the upper outer surface of the body 422. The outer surface of the cemented portion 426 and the inner surface of the framework of the prosthesis 450 are formed to correspond to each other, but unlike the case of the screw-held prosthesis (SRP), the inner surfaces of the cemented portion 426 and the prosthesis 450 are precise. It does not have to match. There is a relatively movable space between the abutment 420 and the prosthesis 450 to allow passive bonding, and intervening between the abutment 420 and the prosthesis 450 even if they do not exactly match. The abutment 420 and the prosthesis 450 may be firmly fixed by the dental cement 460. In addition, the structure of the body or the shape of the joint portion may be designed with reference to the cement retaining abutments of the existing internally coupled implants, some of them may be selected and used.

The abutment 420 includes a coupling protrusion 430 formed in the lower portion of the body 422 corresponding to the coupling groove 412 of the fixture 410. Coupling protrusion 430 is formed in a prismatic shape corresponding to the shape of the coupling groove 412. Since the coupling protrusion 430 according to the present exemplary embodiment includes the close contact portion and the rotation preventing portion integrally, the coupling protrusion 430 is in close contact with the inner surface of the coupling groove 412 and is limited to rotate relatively. In this case, the direction in which the abutment 420 is fixed is kept constant, and the abutment 420 is always repositioned.

The lower end of the engaging protrusion 430 is partially lost to form a tapered guide slope 436 in a conical shape. The angled portion remaining in the prismatic shape at the upper portion of the inclined surface 436 is to maintain a constant direction in which the abutment 420 is fixed, and the height of the remaining angled portion is stably formed even when about 0.3 to 0.5 mm The anti-rotation function can be sufficiently performed.

A first screw hole 424 is formed at the center of the abutment 420, and the abutment 420 is formed by fastening the screw 440 to the female screw hole of the fixture 410 through the first screw hole 424. ) And the fixture 410 are mutually bound.

In addition, the prosthesis 450 of the SCRP implant 400 includes a second screw hole 454. The prosthesis 450 is made of only a metal framework and a layer structure of porcelain or the metal itself, and the prosthesis 450 has a second screw hole 454 corresponding to the first screw hole 424. Is formed. The second screw hole 454 is not used for initially fixing the abutment 420 to the fixture 410, but the fixture abuts the abutment 420 and the prosthesis 450 to the fixture 410. It is used for the purpose of separating from or remounting the fixture 410.

Referring to FIG. 11, two fixtures 410 are implanted in the alveolar bone, and the fixtures 410 are not in parallel with each other but are inclined to each other by a predetermined angle. SCRP implant abutments 420 are fixed to each of the two fixtures 410, and the engaging protrusion 430 of the abutments 420 is inserted into the coupling groove 412 of the fixture 410. The abutment 420 is fixed to the fixture 410 while the screw 440 is fastened to the fixture 410 through the first screw hole 424. After fixing the abutment 420, the prosthesis 450 including the second screw hole 454 is bonded onto the abutment 420.

After the abutment 420 and the prosthesis 450 are joined, loosen all the screws 440 through the first and second screw holes 424 and 454 to fix the abutment 420 and the prosthesis 450. 410 may be separated.

Unlike the conventional cement-retaining prosthesis (CRP), the prosthetic part can be easily separated even after the abutment 420 and the prosthesis 450 are bonded. This is because all of the screws 440 can be removed through the second screw hole 454, because a structurally free space is provided inside the improved abutment 420.

Again compared with the abutment shown in FIG. 3 (b), the abutment 420 according to the present embodiment includes a short coupling protrusion 430, and an inclined slope at the end of the coupling protrusion 430 436). Therefore, as shown in FIG. 11, a free space is formed between the coupling protrusion 430 and the coupling groove 412, and the coupling protrusion 430 may escape from the coupling groove 412 even with a slight movement. By 436, the coupling protrusion 430 can be separated without jamming.

Referring back to FIG. 10, after separating the prosthetic part composed of the abutment 420 and the prosthesis 450, residual cement around the abutment 420 and the gum may be removed, and the margin of the prosthesis 450 may be removed. The fineness can be finely adjusted by grinding. In the final finish, the prosthetic part is inserted into the oral cavity and fixed to the fixture 410 with a screw 440, and the second screw hole 454 is filled with a synthetic resin or ceramic material to close the second screw hole 454, respectively. Complete the procedure for SCRP implants.

Example 5

12 is a cross-sectional view of the SCRP implant according to the fifth embodiment of the present invention, Figure 13 is a cross-sectional view for explaining the separation process of the SCRP implant according to the fifth embodiment.

Referring to FIG. 12, the SCRP implant 400 according to the fifth embodiment includes a fixture 410, an abutment 520, a screw 440, and a prosthesis 450. For the fixture 410, the screw 440, and the prosthesis 450 except for the abutment 520, the description and the drawings of the fourth embodiment may be referred to, and repeated descriptions may be omitted.

Fixture 410 includes a thread 414 formed on the outer surface, the coupling groove 412 for receiving the engaging projection 530 of the abutment 520 is formed on the upper surface of the fixture 410. Coupling groove 412 according to the present embodiment has a polygonal inlet, such as hexagonal, octagonal, etc., is formed in a columnar shape having the same cross section as the inlet. However, according to another embodiment of the present invention, the coupling groove may be formed in a cylindrical shape, and at this time, by forming a protrusion or groove corresponding to each other between the coupling protrusion and the coupling groove can be prevented from rotating to each other. A female screw hole corresponding to the screw 440 is formed at the center of the lower end of the coupling groove 412.

The abutment 520 according to the fifth embodiment includes a body 522 and a coupling protrusion 530, and a first screw hole 524 is formed through the body 522 and the coupling protrusion 530. .

A joining portion 526 is formed on the upper outer surface of the body 522. The outer surface of the cemented portion 526 and the inner surface of the framework of the prosthesis 450 are formed to correspond to each other. It does not have to match. There is a relatively movable space between the abutment 520 and the prosthesis 450 to allow passive bonding, and intervening between the abutment 520 and the prosthesis 450 even if they do not exactly match. The abutment 520 and the prosthesis 450 may be firmly fixed by the dental cement 460.

The abutment 520 includes a coupling protrusion 430 formed in the lower portion of the body 522 corresponding to the coupling groove 412 of the fixture 410. Coupling protrusion 430 is formed in a prismatic shape corresponding to the shape of the coupling groove 412. Since the coupling protrusion 430 according to the present exemplary embodiment includes the close contact portion and the rotation preventing portion integrally, the coupling protrusion 430 is in close contact with the inner surface of the coupling groove 412 and is limited to rotate relatively. In this case, the direction in which the abutment 520 is fixed is kept constant and assists in always repositioning the abutment 520.

As shown in Fig. 12, the inductive inclined surface 536 according to the present embodiment is different from the inductive inclined surface 436 in the fourth embodiment. While the guide inclined surface 436 of the fourth embodiment is formed at 360 at the lower end of the anti-rotation part 434, the guide inclined surface 536 of the present embodiment is partially tapered because half of the coupling protrusion 530 is partially lost. ) Forms an inclined surface 536. Therefore, a portion of the hexagonal column shape corresponding to about 180 of the coupling protrusions 530 remains, and the direction in which the abutment 520 is sufficiently fixed can be kept constant even by using the anti-rotation part 534. . However, in order for the coupling protrusion 530 to stably support the abutment 520, at least a part of the upper end of the coupling protrusion 430 should be maintained in an intact prismatic shape. At this time, the length of the portion that completely contacts the inner surface of the locking groove 412 in the locking projection 430, depending on the angle of the pyramid can be maintained as thin as about 0.3-0.5mm.

A first screw hole 524 is formed at the center of the abutment 520, and the abutment 520 is formed by fastening the screw 440 to the female screw hole of the fixture 410 through the first screw hole 524. ) And the fixture 410 are mutually bound.

In addition, the prosthesis 450 of the SCRP implant 400 includes a second screw hole 454. The prosthesis 450 is made of a metal framework and a layered structure of porcelain or the metal itself, and the prosthesis 450 has a second screw hole 454 corresponding to the first screw hole 524. Is formed. The second screw hole 454 is not used for initially fixing the abutment 520 to the fixture 410, but the fixture 410 and the prosthesis 450 are bonded to the abutment 520. It is used for the purpose of separating from or remounting the fixture 410.

Referring to FIG. 13, two fixtures 410 are inclined to each other in the alveolar bone, and the abutments 520 for the SCRP implant are fixed to the fixtures 410, respectively. The coupling protrusion 430 of the abutments 520 is inserted into the coupling groove 412 of the fixture 410, and the screw 440 is fastened to the fixture 410 through the first screw hole 524. The abutment 520 is fixed to the fixture 410. After fixing the abutment 520, the prosthesis 450 including the second screw hole 454 is bonded onto the abutment 520.

After the abutment 520 and the prosthesis 450 are joined, loosen all screws 440 through the first and second screw holes 524 and 454 to fix the abutment 520 and the prosthesis 450. 410 may be separated.

Unlike the conventional cement-retaining prosthesis (CRP), the prosthetic part can be easily separated even after the abutment 520 and the prosthesis 450 are bonded. This is because all of the screws 440 can be removed through the second screw hole 454, because a structural free space is provided inside the improved abutment 520.

The abutment 520 according to the present embodiment includes an induction inclined surface 436 formed by the coupling protrusion 430 obliquely lost. Therefore, as shown in FIG. 13, a free space is formed between the coupling protrusion 430 and the coupling groove 412, and the coupling protrusion 430 may escape from the coupling groove 412 even with a slight movement. By 436, the engaging projection 430 can be separated without being caught.

Example 6

14 is a cross-sectional view of the SCRP implant according to the sixth embodiment of the present invention, Figure 15 is a plan view showing a fixture in the SCRP implant according to the sixth embodiment.

14 and 15, the SCRP implant 600 according to the sixth embodiment includes a fixture 610, an abutment 620, a screw 640, and a prosthesis 650.

The fixture 610 includes a thread 614 formed on an outer surface thereof and is implanted in the alveolar bone along the thread 614. The thread 614 of the implanted fixture 610 is fixed to the alveolar bone by fusion with the tissue of the alveolar bone over time. A coupling groove 612 is formed on the upper surface of the fixture 610 to accommodate the coupling protrusion 630 of the abutment 620.

Coupling groove 612 has a circular inlet, and includes a concave column shape, that is, fallopian tube-shaped close contact grooves 616 that fall from the inlet, the lower end of the close contact groove 616 has a predetermined depth of rotation prevention groove ( 618 is formed. A female threaded hole corresponding to the screw 640 is formed at the center of the lower end of the anti-rotation groove 618.

The abutment 620 includes a body 622 and a coupling protrusion 630, and a first screw hole 624 is formed through the body 622 and the coupling protrusion 630. Abutment portion 626 is formed on the upper outer surface of the body 622, the abutment (using a dental cement 660 interposed between the outer surface of the adhesion portion 626 and the inner surface of the framework of the prosthesis 650) 620 and the prosthesis 650 are bonded. A coupling protrusion 630 is integrally formed at the lower portion of the body 622 to correspond to the coupling groove 612.

The coupling protrusion 630 includes a close contact portion 632 corresponding to the close contact groove 616 of the coupling groove 612 and the anti-rotation protrusion 634 formed on the outer surface of the close contact groove 616. A groove 617 is formed on the inner surface of the tight groove 616 corresponding to the anti-rotation protrusion 634, and the anti-rotation protrusion 634 and the groove 617 are engaged with each other to limit the rotation of the abutment 620. And guide to face in a constant direction. As illustrated in FIG. 15, the anti-rotation protrusion 634 and the groove 617 may be formed in a semi-circular shape, but may be formed in various shapes such as a rectangle and a triangle.

The close contact portion 632 is formed in a conical column shape corresponding to the close contact groove 616, and supports the abutment 620, and moves along the inner surface of the close contact groove 616 to form the abutment 620. To facilitate separation.

A first screw hole 624 is formed at the center of the abutment 620, and the abutment 620 is fastened to the female screw hole of the fixture 610 through the first screw hole 624. ) And the fixture 610 are bound to each other. In addition, since the prosthesis 650 of the SCRP implant 600 includes a second screw hole 654, the abutment 620 and the prosthesis 650 can be separated from the fixture 610.

16 is a cross-sectional view of an SCRP abutment according to another embodiment similar to the sixth embodiment, and FIG. 17 is a plan view of the fixture.

16 and 17, the SCRP implant according to the present embodiment includes a fixture 611, an abutment 621, a screw 640, and a prosthesis 650. The description of the screw 640 and the prosthesis 650 except for the fixture 611 and the abutment 621 may refer to the description of the previous embodiment.

The fixture 611 includes a coupling groove 612 for accommodating the coupling protrusion 631, and the coupling groove 612 has a close contact groove 616 formed in a fallopian tube shape. One or more grooves 617 are formed around the inlet of the coupling groove 612.

The abutment 621 includes a body 622 and a coupling protrusion 631, and a first screw hole 624 is formed through the body 622 and the coupling protrusion 631. Coupling protrusion 631 includes a close contact portion 632 and the anti-rotation protrusion 634. The close contact portion 632 is formed in a conical column shape corresponding to the close contact groove 616, the anti-rotation protrusion 634 is formed adjacent to the periphery of the close contact portion 632. To this end, the body 622 includes a gingival portion supported by the platform of the fixture 611, the anti-rotation protrusion 634 is formed on the bottom surface of the gingival portion. The anti-rotation protrusion 634 and the groove 617 mesh with each other to restrict the rotation of the abutment 621 and guide the abutment 621 to face in a constant direction. As shown in FIG. 16, the anti-rotation protrusion 634 may be formed in a small cone shape, but may be formed in various shapes such as hemispherical shape or column shape. The close contact portion 632 is formed in a conical column shape corresponding to the close contact groove 616, and supports the abutment 621, and moves along the inner surface of the close contact groove 616 to form the abutment 621. To facilitate separation.

A first screw hole 624 is formed at the center of the abutment 620, and the abutment 620 is fastened to the female screw hole of the fixture 610 through the first screw hole 624. ) And the fixture 610 are bound to each other. In addition, since the prosthesis 650 of the SCRP implant 600 includes a second screw hole 654, the screw 640 can be unwound through the first and second screw holes 624 and 654, and the bonded word The butt 620 and the prosthesis 650 can be separated from the fixture 610.

Example 7

FIG. 18 is an exploded perspective view illustrating an SCRP implant according to a seventh embodiment of the present invention and an abutment used therein, and FIG. 19 is a cross-sectional view illustrating a process of separating the SCRP implant according to the seventh embodiment. .

18 and 19, the SCRP implant includes a fixture 710, an abutment 720, a screw 740, and a prosthesis 750.

A coupling groove 712 is formed at an upper end of the fixture 710, and the coupling groove 712 has a pentagonal inlet, and forms a pentagonal pyramid-shaped groove inside the fixture 710. Correspondingly, the abutment 720 includes a coupling protrusion 730 corresponding to the coupling groove 712. The coupling protrusion 730 is also formed to protrude to the lower portion of the body 722 in a pentagonal pyramid shape, is inserted into the coupling groove 712 is in close contact with the inner surface of the coupling groove 712. Since the rotation of the coupling protrusion 730 is limited by the coupling groove 712, the abutment 720 may be repositioned to always face in a constant direction with respect to the fixture 710, and the abutment 720 The orientation of the abutment 720 can be precisely aligned when it is removed from the fixture 710 and then repositioned.

Coupling protrusion 730 includes a close contact and the rotation preventing portion integrally formed corresponding to the coupling groove 712. If the difference between the close contact portion and the anti-rotation portion, the pyramid pillar surface in the pyramid pillar corresponds to the contact portion, it can be said that the intersection portion of each pyramid pillar surface corresponds to the rotation prevention portion.

As shown in FIG. 19, the abutments 720 are positioned in the fixtures 710 that are placed to be inclined to each other, and the fixtures 710 and the abutments 720 respectively form the first screw holes 724. It is fastened by a screw 740 passing through, the prosthesis 750 is bonded and fixed by the dental cement 760 to the bonding portion of the abutment 720.

In the prosthesis 750, a second screw hole 754 corresponding to the first screw hole 724 is formed, and the screw 740 may be released and separated through the second screw hole 754. In the SCRP implant according to the present embodiment, since the abutment 720 and the prosthesis 750 are bonded using the dental cement 760, passive bonding may be achieved. In addition, the screw 740 can be easily released through the first and second screw holes 724 and 754. After the screw 740 is released, the abutment 720 and the prosthesis 750 are easily bonded. Prosthesis can be easily removed.

In addition, the coupling protrusion 730 of the abutment 720 is formed in a pentagonal pyramid shape, so that each abutment 720 can be easily pulled out without being caught by the fixture 710 when the prosthetic portion is separated.

Although the coupling groove 712 and the coupling protrusion 730 are formed in a pentagonal pyramid shape in this embodiment, the pyramid pillar shape may be variously selected by a designer, and may be variously designed such as a hexagonal pyramid pillar and an octagonal pyramid pillar. Of course, the shape may be changed in various ways, such as evenly divided or non-evenly divided.

Example 8

20 is an exploded perspective view illustrating an SCRP implant and an abutment used according to an eighth embodiment of the present invention.

Referring to FIG. 20, the SCRP implant includes a fixture 810, an abutment 820, a screw and a prosthesis.

A coupling groove 812 is formed at an upper end of the fixture 810, and the coupling groove 812 is formed as a conical pillar-shaped groove. Correspondingly, the abutment 820 includes a coupling protrusion 830 formed in a conical column shape corresponding to the coupling groove 812. Coupling protrusion 830 includes a conical pillar-shaped contact portion 832 and the anti-rotation uneven portion 834 formed on the side of the contact portion 832. In the present embodiment, two grooves 817 are formed on the inner surface of the coupling groove 812 to face each other, are arranged in the vertical direction, and the anti-rotation recesses and protrusions 834 corresponding to the grooves 817 are vertically long. It is formed in projection shape. The close contact portion 832 is in close contact with the inner surface of the coupling groove 812 to support the abutment 820, and the anti-rotation uneven portion 834 is engaged with the groove 817 to rotate the abutment 820. The orientation of the abutment 820 at the time of prevention and repositioning can be the same as the state before removal.

As in FIG. 19 of the seventh embodiment, two or four abutments 820 according to the present embodiment may be coupled to a fixture 810 that is inclined to each other in a set. Once the abutment 820 is fastened by a screw passing through the first screw hole 824, the prosthesis and the abutment 820 may be easily bonded by dental cement. In addition, since the screw can be easily loosened through the second screw hole, the prosthesis and abutment 820 can be easily separated from the fixture 810.

In addition, the engaging projection 830 of the abutment 820 is formed in a conical column shape to form an inclined slope, which is a clearance between the abutment 820 and the fixture 810 when separating the prosthetic portion. By forming a space, the abutments 820 can be easily escaped from the fixture 810 without being caught.

In the present embodiment, the groove 817 and the anti-rotation uneven portion 834 has a hemispherical cross section, but may have various cross sections such as triangles and squares, and its length, depth, and height under the principle of preventing relative rotation. Etc. may be variously changed.

21 is an exploded perspective view illustrating an SCRP implant and abutment according to another embodiment similar to the eighth embodiment of the present invention. In the SCRP implant of FIG. 21, a groove-shaped anti-rotation uneven portion 834a is formed in the coupling protrusion 830a, and a protrusion protrusion 817a is formed on the inner surface of the coupling groove 812a. Since other functions and configurations are substantially the same as the configurations and functions of the seventh embodiment, reference may be made to the description and drawings of the seventh embodiment, and repetitive contents may be omitted.

Unlike the seventh embodiment, the anti-rotation uneven portion 834a is indented to form a groove shape, and the protrusion 817a is formed on the inner surface of the coupling groove 812a, but basically the anti-rotation uneven portion of the seventh embodiment ( 834 and the grooves 817 function substantially the same.

Example 9

22A is a cross-sectional view of an SCRP implant according to a ninth embodiment of the present invention, and FIG. 22B is a cross-sectional view illustrating a separation process of an SCRP implant according to a ninth embodiment.

Referring to FIG. 22A, the SCRP implant according to the ninth embodiment includes a fixture 110, an abutment 120, a screw 140, and a prosthesis 150. For the fixture 110, the abutment 120, and the screw 140 except for the prosthesis 150, reference may be made to the description and the drawings of the first embodiment, and repeated content may be omitted. For reference, the description of this embodiment will be limited to the SCRP implant of the first embodiment, but by the following description, the features of this embodiment can be easily applied to the SCRP implant of other embodiments.

A coupling groove is formed on an upper surface of the fixture 110, and the coupling protrusion 130 of the abutment 120 also includes a close contact portion and a rotation preventing portion. A first screw hole 124 is formed at the center of the abutment 120, and the screw 140 is coupled to the fixture 110 through the first screw hole 124.

The prosthesis 150 is composed of a layered structure of a metal framework 152 and porcelain 153. The metal framework 152 has holes corresponding to the first screw holes 124. The porcelain 153 is formed in a tooth shape on the metal framework 152. In general, conventional internally bonded prostheses have the structure of a metal framework and porcelain, but no holes are formed in the metal framework. On the contrary, in the prosthesis 150 of the SCRP implant according to the present embodiment, holes are formed in the metal framework 152. By forming the porcelain 153 layer on the hole-formed metal framework 152, a portion 154P corresponding to the second screw hole may not be exposed to the outside immediately after the implant is formed, thereby forming an aesthetic appearance. In addition, the heterogeneity that the patient may feel immediately after the procedure can be significantly reduced.

Referring to FIG. 22B, the second screw hole 154 may be subsequently formed using a fine drill D, and the like, and the screw 140 may be formed through the first and second screw holes 124 and 154. It can be easily separated. The treatment method of this embodiment is characterized in that the second screw hole 154 is subsequently formed as a modification of the SCRP implant treatment method according to the first embodiment.

By forming the second screw hole 154, the abutment 120 and the prosthesis 150 that are joined can be easily separated from the fixture 110, and the abutment 120 and the prosthesis 150 are fixed. Can be easily remounted in the chur (110).

The outer surface 122 of the abutment 120 and the inner surface of the metal framework 152 have approximately corresponding shapes, but are not completely consistent. That is, like a cement retaining implant, the prosthesis 150 may be passively adapted to the abutment 120 by providing a clearance between the abutment 120 and the prosthesis 150. At this time, the dental cement is interposed between the abutment 120 and the prosthesis 150 to bond the abutment 120 and the prosthesis 150.

The implant according to the present embodiment may be useful in the case where the second screw hole 154 should not be formed, such as in the case of the anterior tooth corresponding to the incisor, and cement without removing the prosthesis even in the molar portion corresponding to the molars. It can be usefully applied even if it is easy to remove. In this case, the cement-retaining implant is different from that of the SCRP implant when used with the SCRP abutment 120 to further highlight the characteristics of the SCRP abutment 120 and the second screw hole 154 to be formed. You can also mark the location in advance.

In this embodiment, the prosthesis 150 is composed of a metal framework and porcelain, but in addition to this can be composed only of porcelain without a metal framework, after the prosthesis is bonded, the portion corresponding to the second screw hole It is not exposed to the outside and can form an aesthetic appearance.

According to the present invention, the SCRP implant method adopts the advantages of both the screw retaining type and the cement retaining type, and solves the disadvantages of both methods to satisfy most conditions required by implant prostheses.

In other words, a passive fit between the implant and the prosthesis can be easily achieved, the screw is properly adjusted for less screw loosening, the screw can be retightened without damage to the prosthesis without loosening, and the separation and mounting of the prosthesis is easier than with cement retaining. It is easy to use, and the permanent use of cement is low, so there is no risk of dropping out, and it can be applied to narrow interstices. In addition, it is easy to remove gingival cement and polish the prosthetic margins, the pore process is simple, the clinical procedure is simple, the time and cost can be saved significantly, and the constraints are small to select the type of prosthetic metal. This free, immediate implant procedure is very advantageous, can be applied to almost all cases, and in many implant prostheses, one cement can be detached and reattached without damage to the prosthesis even if the cement of the abutment is fragile or poor. Even if tightly tightened, no excessive force is applied to the implant, and thus, the screw may be tightened with the required torque even for the implant having a weak bone.

In addition, the abutment according to the present invention forms a close groove and a clearance groove in the receiving portion that is engaged with the fixture. Therefore, the abutment can be repositioned in the fixture by the contact grooves, and the abutment and the prosthesis can be easily detached from the fixture even after being bonded by the clearance groove, and can be easily remounted. In particular, in the case of fixing two or more abutments in one prosthesis integrally, the free groove provides a free space so that the coupling protrusion of the fixture can be easily separated, and the close groove has abutment fixed to the fixture. Guide them to their location.

In addition, the prosthesis and abutment can be easily removed and remounted from the fixture, making it easy to maintain, repair and replace the implant in the event of fracture or loosening of the implant.

In addition, it is very economical because the abutment according to the present invention can be implemented based on the structure of most conventional abutments.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and modified within the scope of the present invention without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated that it can be changed.

Claims (19)

Providing an abutment including a coupling protrusion formed at a lower portion of the body and a first screw hole formed to vertically penetrate the body; Repositioning and inserting the coupling protrusion into a coupling groove formed at an upper portion of the fixture corresponding to the coupling protrusion; Binding the abutment to the fixture using a screw corresponding to the first screw hole; Providing a prosthesis including a second screw hole formed corresponding to the first screw hole; And And affixing the prosthesis and the abutment via dental cement between the abutment and the prosthesis. The method of claim 1, Removing the screw through the second screw hole, separating the cemented prosthesis and abutment from the fixture, removing residual cement, and polishing the margin of the prosthesis. Procedure for the Maintenance of Implants. The method of claim 1, A close contact portion supporting the abutment in whole or in part in close contact with the coupling groove formed in the fixture on the coupling protrusion and adjacent to the close contact portion to allow relative rotation of the abutment with respect to the fixture. Providing an anti-rotation part for limiting, the inclined surface formed by partially contacting the anti-rotation part or the anti-rotation part, a free space is formed between the engaging projection and the engaging groove by the inclined surface, and the free space The method of claim 1, wherein the prosthesis and the abutment are easily separated from the fixture. The method of claim 1, The coupling groove and the coupling protrusion are provided in a polygonal shape having a polygonal cross section, and the prosthesis and the abutment are easily removed from the fixture by using an inclined surface formed by the coupling protrusion partially lost. A method of treatment of a screw / cement retaining implant, characterized in that the separation. The method of claim 1, Binding the abutments to the plurality of fixtures spaced apart by a predetermined interval, respectively, and providing the prosthesis in a state of integrally providing the prosthesis corresponding to the abutments, A method for the treatment of a screw / cement retaining implant, characterized in that the prosthesis is simultaneously bonded with the abutments. Abutment comprising a coupling protrusion formed in the lower portion of the body and the first screw hole formed to penetrate the body up and down is bound to the fixture by a screw, Providing an implant in which the prosthesis is bonded on the abutment ; Forming a second screw hole in the prosthesis corresponding to the first screw hole; And And unscrewing the screw through the first and second screw holes to separate the prosthesis and the abutment from the fixture. The method of claim 6, The prosthesis includes a metal framework formed in the bottom layer to directly receive the abutment and porcelain formed on the metal framework, the hole corresponding to the first screw hole to form the second screw hole. Method for treating a screw / cement-maintained implant, characterized in that formed on the metal framework. The method of claim 6, The prosthesis is a treatment method of a screw / cement retaining implant, characterized in that consisting of porcelain. In the abutment for screw / cement retaining implants, A body including a bonding part joined to the prosthesis and having a screw hole penetrating up and down; Is formed in the lower portion of the body, in close contact with the coupling groove in the whole or part of the upper part of the fixture to support the body and is formed adjacent to the contact portion to limit the relative rotation of the body relative to the fixture It includes an anti-rotation portion, the contact portion or the anti-rotation portion is provided with a coupling protrusion having an inclined surface formed by partially missing, A free space is formed between the coupling protrusion and the coupling groove by the guide inclined surface, and the body, to which the prosthesis is bonded, is easily separated from the fixture by the free space. Abutment. The method of claim 9, Corresponding to the coupling groove formed in a conical column shape, the close contact portion is also formed in a conical column shape at the bottom of the body, the anti-rotation portion formed in an oval or prismatic shape at the bottom of the close contact portion is integrally formed with the close contact portion, the rotation An abutment for a screw / cement retaining implant, characterized in that the guard is lost in a partially inclined direction to provide the guide inclined surface. The method of claim 9, Corresponding to the coupling groove formed in a conical column shape, the close contact portion is also formed in a conical column shape at the bottom of the body, the anti-rotation portion formed in an oval or prismatic shape at the bottom of the close contact portion is integrally formed with the close contact portion, the close contact And an anti-rotation portion partially lost in an inclined direction to provide the guide inclined surface. The method of claim 9, The close contact portion and the anti-rotation portion are also integrally formed at the bottom of the body in the form of a prismatic shape corresponding to the coupling groove formed in the prismatic shape, and the close contact portion and the anti-rotation portion are partially lost in the inclined direction to form the induction slope. Abutment for a screw / cement retaining implant, characterized in that it is provided. The method of claim 9, The close contact portion is formed in a cylindrical shape at the bottom of the body corresponding to the coupling groove formed in a cylindrical shape, the anti-rotation portion corresponding to the unevenness formed on the inner surface of the coupling groove at least one anti-rotation irregularities formed on the side of the contact portion An abutment for a screw / cement-retaining implant comprising a portion. The method of claim 9, The abutment for the screw / cement maintenance implant according to the coupling groove formed in the pyramid pillar shape is characterized in that the close contact portion and the rotation preventing portion is formed integrally in the pyramid pillar shape at the bottom of the body. The method of claim 9, The close contact portion is formed in a conical pillar shape at the bottom of the body corresponding to the coupling groove formed in the conical pillar shape, the anti-rotation portion corresponding to the irregularities formed on the inner surface of the coupling groove at least one rotation formed on the side of the close contact portion An abutment for a screw / cement-retaining implant, comprising an anti-concave-convex portion. The method of claim 9, The body includes a gingival portion supported by the platform of the fixture, the close contact portion is formed in the lower end of the body corresponding to the shape of the coupling groove in the coupling projection, the anti-rotation portion is formed at least on the bottom surface of the gingiva And a protrusion, wherein the protrusion is engaged with a groove formed in the platform of the fixture to limit rotation of the abutment, and the close contact part is partially lost to provide the guide inclined surface. Abutments for / cemented implants. In thread / cement retaining implants, Fixture formed at the top of the coupling groove; And A body including a joining portion joined to the prosthesis and having a screw hole vertically penetrated therethrough; And an anti-rotation part formed at the lower part of the body to be in close contact with the coupling groove in whole or in part to support the body and to be adjacent to the contact part to limit relative rotation of the body with respect to the fixture. It includes, the abutment comprising a; engaging protrusion having an inclined surface formed in part of the close contact portion or the anti-rotation portion, A free space is formed between the coupling protrusion and the coupling groove by the guide inclined surface, and the body, to which the prosthesis is bonded, is easily separated from the fixture by the free space. The method of claim 17, The coupling groove is formed in a pyramid pillar shape, the contact portion and the anti-rotation portion corresponding to the coupling groove is a screw / cement maintenance implant, characterized in that formed integrally in the pyramid pillar shape at the bottom of the body. The method of claim 17, The coupling groove is formed in a conical column shape, the close contact portion is formed in a conical column shape at the bottom of the body corresponding to the coupling groove, the anti-rotation portion corresponding to the irregularities formed on the inner surface of the coupling groove side A screw / cement retaining implant, characterized in that it comprises at least one anti-rotation uneven portion formed in the.