KR20230044765A - Dental abutment system having cement-free crown - Google Patents

Abstract

Disclosed is a dental abutment system having a cement-free crown, which can fundamentally prevent an adverse effect due to cement exposure. The dental abutment system having a cement-free crown according to an embodiment of the present invention may include: a fixture mounted to the alveolar bone; a base abutment fixed by a first screw which is inserted through a fastening hole formed at the center thereof and is then screw-coupled to the fixture in a state in which a part of the first screw has been inserted into a center hole of the fixture; and a crown fixed by a second screw which is inserted through the fastening hole of the center thereof and is then inserted into and screw-coupled to the upper end center of the first screw, so that the lower end of the crown can be brought into close contact with and assembled to the upper end of the base abutment.

Description

Dental abutment system having cement-free crown {Dental abutment system having cement-free crown}

The present invention relates to a dental abutment system, and more particularly, to a dental abutment system having a crown that does not require cement, which can fundamentally prevent side effects due to cement exposure.

In general, an implant used in dentistry refers to forming a tooth by planting a metal having a root shape of a tooth into a jawbone in an area where teeth are partially or wholly lost in the oral cavity, so that they adhere to the bone, and then form a tooth.

In the procedure of artificial teeth using an implant, first, a groove corresponding to the dimensions of the implant is formed through a process of drilling and tapping in the alveolar bone, and a fixture mount is fastened to the top of the implant. Thereafter, the implant fixture is implanted into the alveolar bone using a surgical hand piece, and then the fixture mount is removed from the implant. Then, the first operation is completed by fastening the cover screw to the top of the implant and suturing the implant. The cover screw serves to prevent bacteria and foreign substances remaining in the oral cavity from invading the inside of the implant while waiting for osseointegration of the implant. The osseointegration period varies somewhat depending on the patient's bone quality and implantation location, but generally takes 3 to 5 months.

Thereafter, the gum is opened through secondary surgery to expose the cover screw, the degree of osseointegration of the implant is checked, and the cover screw is removed. Then, to prevent the gum from covering the space where the artificial tooth is to be located and to form an aesthetic gum, a healing cap is fastened to the upper part of the implant and waited for a certain period of time. Finally, after confirming the esthetic gum formation, the healing cap is removed, and the impression coping is fastened to the top of the implant to manufacture a prosthesis.

Subsequently, a preliminary impression is taken in the oral cavity using impression material, and the coping for impression is removed. Through this, the abutment tooth and the prosthesis are completed, the abutment tooth is fastened to the top of the implant, and the artificial tooth is completed by fixing the prosthesis on the abutment tooth.

In a series of conventional dental procedures, referring to FIG. 1 , a crown 4, which is an artificial tooth, is fixed to an abutment, in this case, to a post using cement 4a, which is an adhesive. At this time, the cement 4a is applied to the inside of the crown 4 and the crown 4 is fixed to the abutment using this, but there is a problem in that inflammation occurs when the cement 4a is exposed to the gum.

According to the present invention, it is intended to provide a dental abutment system having a crown that does not require cement, which can prevent inflammation due to cement exposure in advance by allowing the crown to be fastened and fixed to the abutment only with screws.

A dental abutment system having a crown that does not require cement according to an aspect of the present invention includes a fixture mounted on an alveolar bone; A base abutment that is fixed by screwing a first screw to the fixture through a fastening hole formed in the center in a state in which a portion thereof is inserted into the central hole of the fixture; and a crown fixed by being inserted and screwed into the center of the upper end of the first screw through a central fastening hole so that the lower end can be tightly assembled to the upper end of the base abutment.

At this time, the first screw may be fixed in a state in which an upper part is partially inserted into the fastening hole of the crown.

At this time, an annular insertion portion inserted and seated in an insertion groove formed in the base abutment may be formed at a lower end of the crown.

At this time, the outer surface of the insertion portion may be formed in a polygonal or circular shape.

At this time, an inner diameter reduction part may be formed in the fastening hole of the crown so that the head of the second screw can be caught.

At this time, an outer taper part is formed on the outer side of the upper part of the first screw, and an inner taper part corresponding to the outer taper part is formed on the lower inner surface of the fastening hole of the crown, so that at least a part of it is in surface contact during fastening.

In this case, the inner taper part may be formed longer than the outer taper part.

At this time, in a state in which two or more fixtures are inserted and fixed into the alveolar bone at different implantation angles, the implantation angle formed by the central axes of each base abutment is the taper angle of the inner taper part and the outer taper part with respect to the central axis. It can be made equal or smaller.

In this case, a taper angle between the outer taper part and the inner taper part with respect to the central axis of each base abutment may be up to 24 degrees or less.

According to the above configuration, the dental abutment system having a crown that does not require cement according to the present invention does not require cement because the crown is fastened to the base abutment using only screws during implantation. It is possible to prevent gum inflammation caused by gum disease in advance.

According to the above configuration, the dental abutment system having a crown that does not require cement according to the present invention prevents the soft tissue of the base abutment from being exposed, thereby protecting it from contamination by the external environment such as bacteria. .

According to the configuration described above, the dental abutment system having a crown that does not require cement according to the present invention enables temporary prosthetics without cement as an adhesive and eliminates the need for anesthesia, thereby saving prosthesis time.

In addition, when using a full arc, it enables a more advantageous procedure than multi-abutment at a lower position.

In addition, it is possible to perform a bridge operation while having the maximum compensation angle.

In addition, specifications for angle compensation can be expanded and applied in various ways.

In addition, since the individual designed crown can be reprinted with a 3D printer and replaced quickly using a screw, maintenance is very easy.

1 is a cross-sectional view of a dental abutment system in which a crown is fixed according to the prior art.
2 is a perspective view of a dental abutment system having a cementless crown according to an embodiment of the present invention.
3 is an exploded perspective view of a dental abutment system having a cementless crown according to an embodiment of the present invention.
4 is a longitudinal cross-sectional view of a dental abutment system having a cementless crown according to an embodiment of the present invention.
5 is a schematic procedure flow chart of a dental abutment system having a cement-free crown according to an embodiment of the present invention.
6 is a perspective view of a crown, which is a part of a component of a dental abutment system having a crown that does not require cement according to an embodiment of the present invention.
7 is a front view of a crown, which is a part of a component of a dental abutment system having a crown that does not require cement according to an embodiment of the present invention.
8 and 9 are front and bottom views of a crown, which is a part of a component of a dental abutment system having a cement-free crown according to another embodiment of the present invention.
10 is a configuration diagram of applying a dental abutment system having a crown that does not require cement according to an embodiment of the present invention to a multi-crown.

Words and terms used in this specification and claims are not construed as limited in their ordinary or dictionary meanings, but in accordance with the principle that the inventors can define terms and concepts in order to best describe their inventions. It should be interpreted as a meaning and concept that corresponds to the technical idea.

Therefore, the embodiments described in this specification and the configurations shown in the drawings correspond to a preferred embodiment of the present invention, and do not represent all the technical ideas of the present invention, so that the corresponding configurations are various to replace them at the time of filing of the present invention. There may be equivalents and variations.

In this specification, terms such as "include" or "have" are intended to describe the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

A component being in the "front", "rear", "above" or "below" of another component means that it is in direct contact with another component, unless there are special circumstances, and is "in front", "rear", "above" or "below". It includes not only those disposed at the lower part, but also cases in which another component is disposed in the middle. In addition, the fact that certain components are “connected” to other components includes cases where they are not only directly connected to each other but also indirectly connected to each other unless there are special circumstances.

Hereinafter, a dental abutment system according to an embodiment of the present invention will be described with reference to the drawings.

Referring to FIGS. 2 to 7, the dental abutment system having a crown that does not require cement according to an embodiment of the present invention includes a fixture 10, a base abutment 30, and a first screw ( 20), and a crown 40.

The fixture 10 is mounted on the alveolar bone, referring to FIGS. 2 to 5 . At this time, it is possible to form a groove corresponding to the implant dimension through a process of drilling and tapping in the alveolar bone, and fasten the fixture mount to the top of the implant.

At this time, the fixture 10 has a screw formed on the outer surface to be screwed into the alveolar bone, and a fastening hole 11 is formed on the inner side. Here, a part of the base abutment 30 is inserted into the fastening hole 11, and the screw 21 of the first screw 20 is fastened to the screw of the fastening hole 11, so that the base abutment 30 It is firmly fixed.

Referring to FIGS. 5 to 5 , the base abutment 30 penetrates the fastening hole formed in the center in a state in which a part of the base abutment 30 is inserted into the fastening hole 11 of the fixture 10, and the first screw ( 20) may be fixed by screwing to the fixture 10.

At this time, the first screw 20 has a fastening screw 21 formed from the lower end to a certain height, and referring to FIG. 3, an enlarged diameter portion whose diameter increases as it goes up is formed, so that when fastening, the base abutment (30) can be fixed. In addition, the first screw 20 has a fastening hole 22 formed at the center of the upper end, and is removed in a state in which the crown 40 is aligned with the base abutment 30 in a similar manner to the base abutment 30. 2 The screw 60 may be fixed by being coupled with the screws 61 and 22. Here, an outer taper portion 20a is formed from the upper end of the first screw 20 to a predetermined distance.

Referring to FIGS. 2 to 7 , the crown 40 penetrates the fastening hole 40a in the center so that the lower end can be closely assembled to the upper end of the base abutment 30, and the first screw 20 ) can be fixed by being inserted into the center of the top and screwed together.

At this time, an outer taper part 20a is formed on the outer side of the upper part of the first screw 20, and an inner taper part 40c corresponding to the outer taper part 20a is formed on the lower inner surface of the crown 40. It may be formed so that at least a part of it is in surface contact during fastening.

At this time, after the outer taper part 20a and the inner taper part 40c are fastened, the entire taper part may come into close contact with each other. Therefore, the angle formed by the outer tapered portion 20a and the inner tapered portion 40c with respect to the central axis of the fastening hole 40a of the abutment 30 and the crown 40 may be formed to be the same.

At this time, referring to FIG. 4 , the inner taper part 40c may be formed longer than the outer taper part 20a.

Referring to FIG. 2 , a perspective view of a dental abutment system having a cementless crown according to an embodiment of the present invention is shown. This is a state in which a crown is operated on the abutment system according to the present invention. In this state, there is no difference from the prior art in appearance, but there is a difference from the prior art in the internal configuration in the drawings to be described later.

Referring to FIG. 3 , an exploded perspective view of a dental abutment system having a cementless crown according to an embodiment of the present invention is shown. From the bottom, the fixture 10 is placed and fixed to the alveolar bone 1. When the base abutment 30 is inserted into the fixture 10, the base abutment 30 is fixed by screwing to the screw of the fixture 10 using the first screw 20. After that, during the procedure, the crown 40 is aligned with the top of the base abutment 30 in the same way, and the second screw 60 is screwed to the inner screw of the first screw 20 to fix it.

Referring to FIG. 4 , a cross-sectional view of a dental abutment system having a cementless crown according to an embodiment of the present invention is shown. The base abutment 30 is fixed to the fixture 10 by the first screw 20, and the crown 40 is assembled and fixed to the base abutment 30 by the second screw 60. there is. At this time, the outer tapered portion 20a of the first screw 20 is tapered at the same angle as the inner tapered portion 40c of the crown 40, and thus is in close contact with each other and is fixed. At this time, the first screw 20 may be fixed in a state in which an upper part is partially inserted into the fastening hole 40a of the crown 40 . At this time, an annular insertion portion 40d inserted and seated in the insertion groove 20b formed in the base abutment 30 may be formed at the lower end of the crown 40 . At this time, the outer surface of the insertion portion 40d may be formed in a polygonal or circular shape, and a hexagonal shape is applied here. Of course, the insertion groove 20b accommodating the insertion portion 40d may also have a hexagonal shape corresponding to the inner side. Relative rotation of the crown 40 with respect to the base abutment 30 can be fundamentally prevented due to the application of such a polygon. At this time, an inner diameter reducing portion 40b may be formed in the fastening hole 40a of the crown 40 so that the head of the second screw can be caught.

Referring to FIG. 5 , a schematic diagram of a procedure for applying the dental abutment system having a cementless crown according to an embodiment of the present invention to a general implant procedure is shown. In (a), after the fixture 10 is placed in the alveolar bone 1, the base abutment 30 is fastened using the first screw 20, and the healing cap 50 is assembled thereon instead of the healing abutment. is in a state 1st treatment is over. In (b), the healing cap 50 is then removed when osseointegration is achieved. At this time, in the conventional case, since the healing abutment is removed, it is easy to be exposed to the external environment such as bacteria, but in the case of the present invention, the base abutment 30 maintains a state placed in the open part of the gum 2. Therefore, exposure to the external environment such as bacteria can be suppressed. In (c), the scan body 60 is fastened as in the prior art. Then, in (d), the scan body 60 is removed. As in (b), in the conventional case, it is exposed to the external environment, but in the case of the present invention, the base abutment 30 is exposed to the outside, such as bacteria. It is difficult to expose to the environment. In (e), finally, the final prosthetic crown 40, which does not require cement, is assembled with the second screw 60. For similar reasons, the present invention can save prosthetic time. That is, since the abutment of the previous stage and the abutment of the final stage are different from each other in the conventional prosthesis, the final prosthetic setting time increases. However, in the case of the present invention, the base abutment is naturally adjusted to the shape of the base abutment during tightening and healing, so prosthetic time can be saved, and since the base abutment protects the soft tissue without exposure, the procedure can be performed without anesthesia. possible.

Referring to Figures 6 and 7, the crown of the abutment system according to an embodiment of the present invention is shown. Since the crown 40, which is a prosthesis, can be manufactured with a 3D printer according to the scanned data for each individual, it can be provided in the most optimal shape for each individual. The crown 40 has a fastening hole 40a through which the second screw 60 can be inserted and fastened at the center of the body 41, and the head of the second screw 60 is formed in the middle of the crown 40. An inner diameter reduction portion 40b is formed so that the part can be caught. An inner tapered portion 40c is formed to the lower end of the inner diameter reducing portion 40b so that the inner diameter increases downward. The inner tapered portion 40c may be formed to be in close contact with the outer tapered portion 20a of the first screw 20 as a whole. A protruding annular insertion part 42 is formed under the body 41 of the crown 40 and can be inserted into the insertion groove 30b of the base abutment 30 . The outer surface of the insertion portion 42 and the inner surface of the insertion groove 30b may be formed in a hexagonal shape corresponding to each other, which may prevent relative rotation of the crown 40 relative to the base abutment 30 .

Referring to FIG. 8 , a crown of a dental abutment system according to another embodiment of the present invention is shown. The difference from the crown 40 shown in FIGS. 6 and 7 described above is the shape of the outer surface of the insertion portion 142 and the shape of the fastening hole 140a of the crown 140. The crown 140 is formed so that the fastening hole 140a passes through the body 141, and the inner diameter reduction part 140b and the insertion part 142 are formed in the same point. The difference is that the outer diameter of the insertion portion 142 has a cylindrical shape, and the portion into which the outer tapered portion 30b of the base abutment 30 is inserted has a cylindrical shape rather than a tapered portion. Of course, the inner diameter of the cylindrical cylinder portion 140c should be greater than or equal to the maximum outer diameter of the outer tapered portion 30b.

Referring to Figure 9, the crown of the dental abutment system according to another embodiment of the present invention is shown. The difference from the crown 40 shown in FIGS. 6 and 7 described above is the presence or absence of an insertion part and the shape of the fastening hole 240a of the crown 240. The crown 240 is formed so that the fastening hole 240a passes through the body 241, and the inner diameter reduction part 240b is formed in the same way. The difference is that it is a flat type without an insertion part, and the part where the outer taper part 30b of the base abutment 30 is inserted has a cylindrical shape rather than a taper part. Of course, it is the same as the crown 140 of FIG. 8 that the inner diameter of the cylindrical cylindrical portion 240c should be greater than or equal to the maximum outer diameter of the outer tapered portion 30b.

Referring to FIG. 10, a state diagram of a dental abutment system coupled to a multi-crown prosthesis according to an embodiment of the present invention is shown. The multi-crown 340 is applied to a prosthesis called a so-called bridge. Here, a dental abutment system having two or more different placement angles may be applied to the multi-crown 340 . In the multi-crown 340, fastening holes 341a and 343a corresponding to the abutment system are formed. Here, the three crowns 341, 342, and 343 form one multi-crown 340, and fastening holes 341a and 343a are formed only on both sides, and the middle crown 342 is not formed. Here, the fastening holes 341a and 343a in both bodies 341 and 342 of the multi-crown 340 are inner diameter reduction parts 341b and 343b, inner tapered parts 341c and 343c, and hexagonal outer surface insertion parts 341d, 343d) is formed in the same way as the crown shown in FIG. 6 .

At this time, the head of the first screw 20 will first be inserted into the fastening holes 341a and 343a of the multi-crown 340 while descending in the vertical direction as a whole in the drawing. Here, since the crown 340 has inner tapered portions 341c and 343c and an outer tapered portion 20a is formed on the head of the first screw 20, the head of the first screw 20 is formed on the crown 340 without interference. ) can be easily inserted into If, as in the prior art, if the tapered parts are not formed, when the crown 340 is inserted, the head edge of the first screw 20 is caught on one side of the lower end of the fastening holes 341a and 343a of the crown 340, making it impossible to insert There may be cases where you have to do or force a fit. Here, since the outer tapered portion 20a and the inner tapered portions 341c and 343c are formed, the bridge operation can be performed easily without interference. At this time, the difference between the implantation angles, θ1, may be preferably 20 to 24 degrees, and an angle half of the angle may be formed equal to the angle formed by the tapered parts with respect to the central axis.

At this time, of course, the multi-crown does not only have a plane angle, but also has a three-dimensional angle. Although it is indicated that an angle is formed on a plane on the drawing, it may be formed at a three-dimensional angle.

In addition, it goes without saying that other types of crowns described above can be applied to the multi-crown. A flat type without an insertion part and a type without an inner taper can be applied to both multi-crowns.

Although the embodiments of the present invention have been described, the spirit of the present invention is not limited by the embodiments presented herein, and those skilled in the art who understand the spirit of the present invention may add or change components within the scope of the same spirit. Other embodiments can be easily proposed by adding, deleting, adding, etc., but this will also be said to be within the scope of the present invention.

10 : fixture
20: first screw 20a: outer taper portion
20b: insertion groove 30: base abutment
40, 140, 240: crown 40a: fastening hole
40b: inner diameter reduction part 40c: inner tapered part
41, 141, 241: body 42, 142: insertion part
60: second screw

Claims (9)

A fixture mounted on the alveolar bone;
A base abutment that is fixed by screwing a first screw to the fixture through a fastening hole formed in the center in a state in which a portion thereof is inserted into the central hole of the fixture; and
A crown fixed by being inserted and screwed into the center of the top of the first screw through a central fastening hole so that the lower end can be closely assembled to the top of the base abutment; including, cement is required. Dental abutment system with missing crown. According to claim 1,
The first screw is fixed in a state in which an upper portion is partially inserted into the fastening hole of the crown, a dental abutment system having a crown that does not require cement. According to claim 1,
A dental abutment system having a crown that does not require cement, wherein an annular insertion portion inserted and seated in an insertion groove formed in the base abutment is formed at the lower end of the crown. According to claim 1,
Dental abutment system having a crown that does not require cement, wherein the outer surface of the insertion portion is formed in a polygonal or circular shape. According to claim 1,
A dental abutment system having a crown that does not require cement, wherein the inner diameter reduction portion is formed so that the head of the second screw can be caught in the fastening hole of the crown. According to claim 1,
An outer taper part is formed on the outer side of the upper part of the first screw, and an inner taper part corresponding to the outer taper part is formed on the lower inner surface of the fastening hole of the crown so that at least a part of it is in surface contact during fastening, a crown that does not require cement Dental abutment system having. According to claim 6,
A dental abutment system having a crown that does not require cement, wherein the inner taper part is formed longer than the outer taper part. According to claim 1,
In a state in which two or more fixtures are inserted into the alveolar bone at different implantation angles, the implantation angle formed by the central axes of each base abutment is the same as the taper angle of the inner taper part and the outer taper part with respect to the central axis, or A dental abutment system with compact, cementless crowns. According to claim 8,
The outer taper part and the inner taper part have a maximum taper angle of 24 degrees or less with respect to the central axis of each base abutment, a dental abutment system having a crown that does not require cement.

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