KR20220158955A - Dental abutment system - Google Patents

Abstract

Disclosed is a dental abutment system capable of compensating the angle when coupling components in an implant surgery. The dental abutment system according to one embodiment of the present invention comprises: a fixture mounted in alveolar bone; a base abutment in which a base screw passes through a coupling hole formed in the center, and is screw-coupled to the fixture while a part of the base abutment is inserted in a center hole of the fixture; and a post passing through the coupling hole in the center and inserted and screw-coupled to the center of the upper end of the base screw to be fixed thereto so that the lower end part of the post is tightly assembled to the upper end of the base abutment, wherein an outer tapered portion is formed on the outer upper part of the base screw, and an inner tapered portion corresponding to the outer tapered portion is formed on the inner lower part of the post so as to enable at least some surface contact upon coupling.

Description

Dental abutment system {Dental abutment system}

The present invention relates to a dental abutment system, and more particularly, to a dental abutment system capable of compensating an angle when components are coupled in an implant procedure.

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 the case of a separable abutment in this series of dental procedures, a dental component such as a post or a healing cap is fastened or separated to the base abutment. There was a problem in that the fastening lines did not match, so compensation was required, and in some cases, fastening was not performed.

According to the present invention, in a separable abutment, when the base abutment and the upper post are coupled, the contact surface of the base screw and the post has a tapered shape, so that angle compensation can be achieved when the separable abutment is fastened. We want to provide a management system.

A dental abutment system according to an aspect of the present invention includes a fixture mounted on an alveolar bone; A base abutment fixed by screwing a base 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 post fixed by being inserted into and screwed into the center of the upper end of the base screw through a central fastening hole so that the lower end of the base abutment can be closely assembled to the upper end of the base abutment. An outer taper part may be formed, and an inner taper part corresponding to the outer taper part may be formed on an inner surface of a lower portion of the post so that at least a portion of the post 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, posts fastened to each of the base abutments may be fixed to the integrated prosthesis at the same angle as the corresponding base abutment, or may be fastened to each of the base abutments and then inserted into a cylinder formed in the prosthesis.

At this time, the post may be a healing cap that is temporarily fastened and separated.

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

At this time, the central axis of the post with respect to the outer surface reference may be inclined at a predetermined angle with respect to the central axis of the base abutment.

At this time, the predetermined angle may be 6 to 18 degrees.

According to the configuration described above, the dental abutment system according to the present invention can prevent the soft tissue of the base abutment from being exposed during implantation, thereby protecting it from contamination by an external environment such as bacteria.

In addition, the dental abutment system according to the present invention enables temporary prosthesis without cement, which is an adhesive, and does not require anesthesia, thereby saving prosthetic 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, it is possible to apply to various clinical settings with a small number of posts.

1 is a perspective view of a dental abutment system according to an embodiment of the present invention.
2 is an exploded perspective view of a dental abutment system according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view along line AA shown in FIG. 1 .
4 and 5 are state diagrams of a state in which a dental abutment system according to an embodiment of the present invention is coupled to a prosthesis.
6 is a schematic flowchart of applying the dental abutment system according to an embodiment of the present invention to a general implant procedure.
7 is a schematic view showing types of angle compensation according to various placement angles of a dental abutment system according to an embodiment of the present invention.

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. 1 to 8 , the dental abutment system according to an embodiment of the present invention includes a fixture 10, a base abutment 30, a base screw 20, and a post 40. include

Referring to FIGS. 1 to 3 , the fixture 10 is mounted on the alveolar bone 1 . At this time, it is possible to form a groove corresponding to the dimensions of the implant through a process of drilling and tapping in the alveolar bone 1, 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 to the alveolar bone 1, 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 base screw 20 is fastened to the screw of the fastening hole 11, so that the base abutment 30 is solid. it is fixed

Referring to FIGS. 1 to 3 , the base abutment 30 penetrates the fastening hole formed in the center in a state in which a portion of the base abutment 30 is inserted into the fastening hole 11 of the fixture 10, and the base screw 20 ) can be fixed by screwing to the fixture 10.

At this time, the base 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 base screw 20 has a fastening hole 22 formed at the center of the upper end, and in a state in which the post 40 is aligned with the base abutment 30 in a similar manner to the base abutment 30, the post screw (60) can be fixed by being coupled with screws (61, 22). Here, an outer taper portion 20a is formed from the upper end of the base screw 20 to a predetermined distance.

Referring to FIGS. 1 to 3 , the post 40 passes through the fastening hole 40b in the center so that the lower end can be tightly assembled to the upper end of the base abutment 30, and the base screw 20 It can be fixed by being inserted and screwed into the upper center of the.

At this time, an outer taper portion 20a is formed on the outer side of the upper portion of the base screw 20, and an inner tapered portion 40a corresponding to the outer taper portion 20a is formed on the lower inner surface of the post 40 It can be made so that at least a part of it is in surface contact during fastening.

At this time, after the outer tapered portion 20a and the inner tapered portion 40a are fastened, the entire tapered portion may be in close contact with each other. Accordingly, the angle between the outer tapered portion 20a and the inner tapered portion 40 with respect to the central axis of the abutment 30 and the post 40 may be formed to be the same.

At this time, referring to FIG. 3 , the inner taper part 40a may be formed longer than the outer taper part 20a.

At this time, referring to FIGS. 4 and 5 , the taper angle between the outer taper part 20a and the inner taper part 40a with respect to the central axis of each member may be up to 12 degrees or less. In FIG. 4 , the implantation angle θ1 may be 8 degrees at maximum, and θ2 in FIG. 5 may be 20 to 24 degrees. Accordingly, the angle formed between the central axes of the outer tapered portion 20a and the inner tapered portion 40a can be formed to about 12 degrees, which is half of the maximum of 24 degrees. That is, in a state in which two or more fixtures 10 are inserted and fixed at different angles to the alveolar bone, the angle formed by the central axes of each base abutment 30 is the inner taper part 40a and the outer taper The portion 20a may be formed with a taper angle equal to or smaller than the taper angle with respect to the central axis.

At this time, referring to FIG. 5 , the posts 40 corresponding to each of the base abutment 30 are fixed to the integrated prosthesis 300 at the same angle as the corresponding base abutment 30 or shown in FIG. 4 . For reference, it may be fastened to each of the base abutments 30 and then inserted into a cylinder formed in the prosthesis 300 .

Referring to FIG. 1 , a perspective view of a base abutment 30 and a post 40 installed in a fixture 10 of a dental abutment system according to an embodiment of the present invention is shown. The fixture 10 is completely fastened to and placed in the alveolar bone 1, and the base abutment 30 and the post 40 are sequentially fastened to the fixture 10 to be in a fixed state.

Referring to FIG. 2 , an exploded perspective view of a dental abutment system 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 base screw 20. Then, in the same way, the post 40 is aligned with the top of the base abutment 30 and the post screw 60 is screwed into the inner screw of the base screw 20 to fix it.

Referring to FIG. 3 , a cross-sectional view taken along line AA shown in FIG. 1 of a dental abutment system according to an embodiment of the present invention is shown. The base abutment 30 is fixed to the fixture 10 by a base screw 20, and the post 40 is assembled and fixed to the base abutment 30 by a post screw 60. At this time, the outer tapered portion 20a of the base screw 20 is tapered at the same angle as the inner tapered portion 40a of the post 40, and thus is in close contact with each other to be fixed.

Referring to FIG. 4 , a state diagram of a dental abutment system coupled to a prosthesis according to an embodiment of the present invention is shown. The prosthesis 300 is applied to a cement type prosthesis called a so-called bridge. At this time, a dental abutment system having two or more different placement angles may be applied to the prosthesis. An insertion groove into which the post 40 is inserted is formed inside the prosthesis 300, and an adhesive called cement is applied to the insertion groove. Therefore, each post 40 is inserted into the insertion groove corresponding to the prosthesis 300 and fixed. At this time, the insertion angle, θ1, is about 8 degrees, and since the outer surface of the post is tapered, it is easily inserted when the prosthesis is combined.

Referring to FIG. 5 , a state diagram of a dental abutment system coupled to a prosthesis according to an embodiment of the present invention is shown. The prosthesis 300 is applied to a screw type prosthesis called a so-called bridge. Here, as in FIG. 4 , a dental abutment system having two or more different placement angles may be applied to the prosthesis 300 . Unlike FIG. 4 , each post 40 is pre-installed in the prosthesis 300 at each position other than the insertion groove. At this time, the head of the base screw 20 will be inserted into the post 40 first while the entire prosthesis 300 descends in the vertical direction in the drawing. Here, since the post 40 has an inner taper portion 40a and an outer taper portion 20a is formed on the head of the base screw 20, the head of the base screw 20 can easily attach to the post 40 without interference. can be inserted.

If, as in the prior art, if the tapered parts are not formed, when the post is inserted, the edge of the head of the base screw may be caught on one side of the lower end of the through hole of the post, making insertion impossible or requiring an interference fit. Here, since the outer taper part and the inner taper part are formed, the bridge operation can be performed easily without interference.

At this time, the difference between the implantation angles, θ2, may be 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.

This advantage of the present invention can be applied to so-called multi procedures in addition to bridge cases. In the case of this procedure, four fixtures are usually used, and since each tightened part has a different implantation angle, it is possible to apply in a similar way, and when applying a full arch, it is very advantageous than before. .

Referring to FIG. 6, a schematic diagram of a procedure for applying the dental abutment system 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 base screw 20, and the healing cap 140 is assembled instead of the healing abutment thereon. state 1st treatment is over.

In (b), when osseointegration is achieved, the healing cap 140 is removed. 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 240 is fastened as in the prior art. Then, in (d), the scan body 240 is removed. As in (d), 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. Finally, in (e), the final prosthetic cement post 340 is assembled. Conventionally, the cement abutment is assembled to the fixture, but exposure to the external environment continues until then, but in the present invention, exposure is always suppressed by the base abutment 30.

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. It is possible.

Referring to FIG. 7 , a schematic diagram showing types capable of compensating angles according to various placement angles of a dental abutment system according to an embodiment of the present invention is shown.

At this time, the central axis of the posts 540, 640, and 740 relative to the outer surface may be inclined at a predetermined angle with respect to the central axis of the base abutment 30.

At this time, the predetermined angle may be 6 to 18 degrees.

This embodiment is intended to correspond to various oral structures, a fixture is placed in the alveolar bone, and a base abutment is also fastened to the fixture. In this state, it is possible to select and apply appropriate posts 540, 640, and 740 capable of compensating the angle according to an angle, for example, 6 degrees, 12 degrees, 18 degrees, and the like.

Along with this angle compensation, it is possible to manufacture prosthesis with high aesthetic perfection by minimizing unnecessary margin correction by lowering the height of the labial and buccal margins in a shape similar to the patient's gum line on the post side. In addition, a combination of fewer types of post makes it possible to apply to various clinical settings.

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.

1: alveolar bone
2: gum 10: fixture
20: base screw 20a: outer taper part
30: base abutment 40: post
40a: inner tapered portion 60: post screw

Claims (8)

A fixture mounted on the alveolar bone;
A base abutment fixed by screwing a base 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 post fixed by being inserted into and screwed into the center of the upper end of the base screw through a central fastening hole so that the lower end of the base abutment can be closely assembled to the upper end of the base abutment;
An outer taper part is formed on the outer side of the upper part of the base screw, and an inner taper part corresponding to the outer taper part is formed on the inner surface of the lower part of the post so that at least a part of it is in surface contact during fastening. Dental abutment system.
According to claim 1,
The inner taper part is formed longer than the outer taper part, dental abutment system.
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 compact, dental abutment system.
According to claim 3,
Posts fastened corresponding to each of the base abutments are fixed to the integrated prosthesis at the same angle as the corresponding base abutment or fastened to each of the base abutments and then inserted into a cylinder formed in the prosthesis, dental abutment system.
According to claim 1,
The post is a healing cap that is temporarily fastened and separated, a dental abutment system.
According to claim 1,
The outer taper part and the inner taper part have a taper angle of up to 24 degrees or less with respect to the central axis of each member, dental abutment system. According to claim 1,
The dental abutment system, wherein the post has a central axis with respect to its outer surface referenced at a predetermined angle with respect to the central axis of the base abutment.
According to claim 7,
The predetermined angle is 6 to 18 degrees, dental abutment system.

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