WO2017126821A1

WO2017126821A1 - Implant structure and abutment

Info

Publication number: WO2017126821A1
Application number: PCT/KR2017/000027
Authority: WO
Inventors: 박상오; 허재찬
Original assignee: 오스템임플란트 주식회사
Priority date: 2016-01-19
Filing date: 2017-01-02
Publication date: 2017-07-27
Also published as: TWI644656B; TW201729764A; KR20170086885A; KR101953301B1

Abstract

The present invention relates to an implant structure and an abutment and, more specifically, to an implant structure and an abutment wherein the implant structure comprises a holding part having elasticity difference between upper and lower parts thereof in order to temporarily maintain the abutment inside a fixture while being forcedly fitted in the inner circumferential surface of the fixture when the abutment is inserted in the fixture, the holding part has a step arranged thereon, which is spaced apart from a fastening screw, and the step is positioned at a lower end of the abutment.

Description

Implant Structures and Abutments

The present invention relates to an implant structure and an abutment, and more particularly, to an implant structure and abutment to impart a temporary bonding force when bonding the fixture and the abutment to each other so as not to be pushed even during gingival interference.

In the field of modern dentistry, researches on how to restore the function of teeth lost by various causes are continuously conducted, and clinical trials are actively conducted accordingly. Among them, the most commonly practiced procedure is the use of dental implants. For example, after inserting a fixture constituting an artificial root into the alveolar bone, an implant procedure is mainly performed to fasten an abutment to the fixture and then attach a crown having a shape corresponding to a natural tooth to the abutment. have.

In the procedure using the dental implant, the abutment is temporarily inserted into the fixture placed in the alveolar bone before the abutment is screwed to the fixture, and then the screw is inserted into the abutment to insert the fixture and the abutment. It is firmly fixed.

In the process of temporarily inserting the abutment into the implanted fixture as described above, the abutment may be pushed by the gingiva arranged around the fixture and may not be placed in the correct position. As such, when the abutment is not placed in the fixture, problems such as screwing may occur.

In order to solve this problem, a technique for providing a temporary fixation force when coupling between fixture and abutment is disclosed. Specifically, the 'double contact dental implant' of the Republic of Korea Patent Publication No. 2009-0002387 is known. Referring to the dental implant according to the prior art 1 to 3, as follows.

The implant according to the prior art is shown with a fixture 10 configured to be screwed into the bone of a patient and an abutment 40 configured to be connected to the fixture 10.

Fixture 10 includes a proximal end 12 that includes a table 14 configured to engage an abutment 40. The fixture 10 includes a distal end 16 opposite the proximal end 12, between which at least one spiral 18 is located for screwing the fixture 10 into the patient's bone. Inner bore 20 extends distal from proximal end 12 toward distal end 16. The inner bore 20 includes a first anti-rotation cavity 22 and a second anti-rotation cavity 24 located distal to the first anti-rotation cavity 22.

The abutment 40 includes a post 42 and a stem 44 extending relatively downward from the post. The stem 44 includes a non-locking portion 46 configured to be positioned in the first anti-rotation cavity 22 when the abutment 40 is seated in the implant 40. The stem 44 also includes a locking portion 48 configured to be located in the second anti-rotation cavity 24 when the abutment 40 is positioned in the implant 40. The locking portion 48 is configured to engage with the second anti-rotation cavity 24 in a rotatable and locking manner, thereby preventing the abutment 40 from rotating relative to the fixture 10.

The abutment 40 also includes a feedback element 54, which meshes with the fixture 10 as the abutment 40 is seated so that the abutment 40 is properly seated. It is configured to inform the practitioner. The feedback element 34 of the fixture 10 and the feedback element 54 of the abutment 40 may collectively comprise one or more elastic members configured to deform during the seating process and to be restored when the abutment is properly seated. Can be. 1A, 1B and 3, the feedback element 54 of the abutment 40 includes a plurality of elastic fingers 56 located at the distal end of the stem 44.

The feedback system may be configured to provide only tactile feedback, may be configured to provide only auditory feedback, or may be configured to provide both tactile feedback and auditory feedback.

The dental implant according to the prior art has the following problems.

In the prior art, the feedback element 54 of the abutment 40 is clicked in a groove provided in the internal cavity 20 of the fixture 10 to temporarily fix the fixture 10 and the abutment 40. It is made of a holding structure.

However, in this structure, a groove is provided in the internal cavity 20 of the fixture 10 in order to allow the feedback element 54 to be coupled in a click manner, and the groove is precisely spaced in a narrow space such as the internal cavity 20. It is not only very difficult to process, but also has a problem that the positioning is difficult even after the groove is made. That is, it is difficult for the operator to determine whether the fine groove is formed in the desired position. If the groove is not provided in the correct position, it is difficult to provide tactile and auditory feedback, and precise coupling between the fixture 10 and the abutment 40 is difficult.

In addition, when the groove is formed in the fixture 10, there is a problem that such a groove may reduce the overall strength by reducing the thickness of the entire fixture 10.

In addition, even if the internal cavity 20 of the fixture 10 is precisely manufactured, foreign matter may enter the groove during processing, or when foreign matter in the oral cavity enters the groove after the fixture 10 is placed in the alveolar bone, a problem may occur when bonding. have. When foreign matter enters the groove of the fixture 10 as described above, it is difficult to couple the feedback element 54 to the groove by a click method, so that a temporary fixing force between the fixture 10 and the abutment 40 becomes difficult to expect. .

In addition, the abutment 40 and the screw 70 are almost in close contact with a small gap, if the foreign matter is penetrated between these gaps, the foreign matter also makes it difficult to separate the abutment and the screw. Will be. That is, when the abutment and the screw are in close contact with each other, there is a problem that the screw is caught by the abutment and it is difficult to separate from the abutment even by some foreign matter.

The present invention has been made to solve the above-described problems, and more particularly, to provide an implant structure that provides temporary support that is not pushed by gingival interference when combining fixtures and abutments.

In addition, the present invention by allowing the abutment to be bonded to the fixture without forming a groove in the fixture, the implant structure that can solve the problems caused by the manufacturing difficulties due to the grooving process and the foreign matter caught in the groove The purpose is to provide.

In addition, an object of the present invention is to provide an implant structure that can provide a step between the abutment and the screw to solve the problem caused by the pinch between the abutment and the screw.

The implant structure of the present invention for achieving the above object is a fixture that is inserted into the alveolar bone while rotating around the central axis and serves as an artificial tooth, and is coupled to the fixture to support the upper prosthesis and from the top to the bottom In the implant structure including an abutment extending to and the fastening screw insertion hole is inserted into which the fastening screw is inserted,

The fixture is,

There is a central groove extending from the upper center to the lower side therein to be fitted with the abutment, the central groove has a tapered portion that narrows toward the lower side, and the first rotation preventing portion disposed below the tapered portion and the It includes a cylindrical first cylindrical portion disposed below the first anti-rotation portion,

The abutment,

An upper portion protruding to the outside of the fixture to which the upper prosthesis is attached;

A lower portion disposed below the upper portion and inserted into a central groove of the fixture; And

It is disposed at the lower end of the lower portion and is elastically deformed when the abutment is inserted into the fixture and is fitted to the inner circumferential surface of the first cylindrical portion, including a holding portion for temporarily holding the abutment inside the fixture ,

The holding part is provided with a stepped spaced apart from the fastening screw, and the stepped step is located at the lower end of the abutment.

In the implant structure,

The holding part may be formed in a plurality of protrusions spaced apart from each other along the circumferential direction.

In the implant structure,

The holding part may be formed in a ring shape.

In the implant structure,

The holding unit,

A first portion whose outer surface extends vertically,

It may be formed of a second portion extending downward from the first portion and the outer surface protrudes outward to be fitted to the first cylindrical portion and the stepped portion is provided on the inner surface.

In the implant structure,

The holding portion may include a third portion extending downwardly from the third portion to be concavely recessed so that the outer surface thereof is far from the first cylindrical portion, and extending downward from the third portion, and the outer surface protrudes outward to fit the first cylindrical portion. And it may be made of a fourth portion provided with the stepped on the inner surface.

In the implant structure,

The stepped, the inclined surface inclined downward in a direction away from the fastening screw,

It may include a vertical surface extending vertically downward from the inclined surface.

In the implant structure,

The stepped, the horizontal surface horizontally extended in the direction away from the fastening screw,

It may include a vertical plane extending vertically downward from the horizontal plane.

In the implant structure,

A second anti-rotation part disposed between the upper part and the holding part and inserted into the first anti-rotation part of the fixture to restrain the relative rotation of the abutment with respect to the fixture; May be included.

In the implant structure,

The lower portion of the abutment may further include a second cylindrical portion having a cylindrical shape between the second rotation preventing portion and the holding portion, and the holding portion may extend downward from the second cylindrical portion.

In the implant structure,

The lower end of the second cylindrical portion may be disposed above the upper end of the first cylindrical portion.

In the implant structure,

The holding unit,

While the outer diameter of the outer surface is kept the same, it may extend vertically downward and the step may be provided on the inner surface.

In the implant structure,

The holding part has a concave groove in the center of the outer surface, the stepped portion is provided on the inner surface has a hook shape, the outer diameter of the lower end of the holding portion may be the same as the second cylindrical portion.

In the implant structure,

A lower portion of the first cylindrical portion may be provided with a screw thread to which the fastening screw inserted into the fastening screw insertion hole can be screwed.

Abutment of the present invention for achieving the above object,

Is inserted into the alveolar bone while rotating about the central axis serves as an artificial tooth root, there is provided a central hole extending from the upper center to the lower side to fit the abutment, the central hole, the first having a cylindrical shape In the abutment coupled to the fixture including a cylindrical portion, which supports the upper prosthesis and extends from the upper end to the lower end therein and includes a fastening screw insertion hole into which the fastening screw is inserted.

The abutment includes: an upper portion exposed to the outside of the fixture and to which an upper prosthesis is attached; A holding part disposed below the upper part to hold the abutment temporarily inside the fixture by being elastically deformed and inserted into the inner circumferential surface of the first cylindrical part when the abutment is inserted into the fixture,

The fixture is,

The abutment,

A lower portion disposed below the upper portion and inserted into a central groove of the fixture;

And

It is disposed on the lower end of the lower portion and the elastic portion is deformed when the abutment is inserted into the fixture including a holding portion for temporarily holding the abutment in the interior of the fixture,

The holding portion is formed in a ring shape with an outer diameter larger than the inner diameter of the first cylindrical portion in order to maintain a temporary position in the first cylindrical portion, the inner diameter of the holding portion is kept the same as the inner diameter of the lower portion.

In the implant structure according to the present invention, when the abutment is inserted into the fixture for temporary coupling, the holding part of the abutment is forcibly contacted with the cylindrical portion of the fixture so that the abutment can be temporarily fixed to the fixture. There is an advantage to improve the convenience of the fixture and minimize the departure or pushed by the gingival.

In addition, the implant structure according to the present invention is configured such that the holding portion of the abutment is forcibly fitted into the first cylindrical portion of the fixture without forming a groove inside the fixture. There is an advantage that can solve the problems caused by this pinch.

In another aspect, the present invention, there is an advantage that can solve the problem caused by the pinch between the abutment and the screw by providing a step between the abutment and the screw.

1 is an exploded perspective view of an implant structure according to the prior art.

FIG. 2 is a plan view of an implant fixture in the implant structure of FIG. 1. FIG.

3 is a cross-sectional view of the implant structure of FIG.

Figure 4 is an abutment side view of the implant structure according to an embodiment of the present invention.

5 is a perspective view of FIG. 4.

6 is a cross-sectional view of a fixture of an implant structure in accordance with one embodiment of the present invention.

7 is a cross-sectional view of the abutment of FIG. 4 and the fixture of FIG. 6.

FIG. 8 is an enlarged view of “A” of FIG. 7;

9 is an abutment perspective view of an implant structure according to another embodiment of the present invention.

10 is a cross-sectional view of the abutment of FIG. 9 coupled to the fixture.

11 to 13 are abutment diagrams of implant structures in accordance with another embodiment of the present invention.

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

Hereinafter, with reference to the accompanying drawings a dental implant according to an embodiment of the present invention will be described in detail.

The implant structure 100 according to the embodiment of the present invention includes a fixture 200 and an abutment 300.

The fixture 200 is inserted into the alveolar bone while rotating about a central axis, and serves as an artificial tooth root, and has a columnar shape in which a screw thread is formed on an outer circumferential surface thereof. The central groove into which the butt 300 is fitted is provided.

The center groove of the fixture 200 includes a taper portion 210, a first rotation preventing portion 220, a first cylindrical portion 230, and a screw portion 240.

The tapered portion 210 extends downward from the upper end of the fixture 200 and has a tapered shape in which the diameter becomes narrower toward the lower side.

The first anti-rotation part 220 is disposed below the taper part and disposed above the first cylindrical part 230 to prevent the inserted abutment 300 from rotating relative to a central axis. By doing so, it has a polygonal cross section. The present embodiment has a hexagonal shape, but is not limited thereto and may have various shapes.

The first cylindrical portion 230 is disposed below the first rotation preventing portion 220, and has a substantially cylindrical shape. The holding part 360 of the abutment 300 is fitted to the inner surface of the first cylindrical part 230.

The screw portion 240 is a portion disposed below the first cylindrical portion 230, the screw thread is formed on the inner peripheral surface. A fastening screw 400 inserted into the fastening screw insertion hole 301 of the abutment 300 may be screwed to the screw part 240.

The abutment 300 is coupled to the fixture 200 to support the upper prosthesis (not shown) and is formed with a fastening screw insertion hole 301 extending from the top to the bottom. The abutment 300 is protruded upward from the center groove of the fixture 200 and is disposed below the upper portion 310 to which the upper prosthesis is attached, and the fixture portion 200 and the fixture 200. The lower side 320 is inserted into the central groove of the).

The lower portion 320 includes a tapered insertion portion 330, a second rotation preventing portion 340, a second cylindrical portion 350, and a holding portion 360.

The taper inserting portion 330 is inserted into the taper portion 210 of the fixture 200 and has a taper shape corresponding to the taper portion 210 of the fixture 200. Specifically, the tapered insert 330 has a shape of tapering inward toward the lower side.

The second anti-rotation part 340 is inserted into the first anti-rotation part 220 of the fixture 200 to restrain the relative rotation of the abutment 300 with respect to the fixture 200. The second anti-rotation portion 340 has a shape corresponding to the first anti-rotation portion 220 of the fixture 200, but in the present embodiment has a hexagonal pillar shape.

The second cylindrical portion 350 is disposed between the second rotation preventing portion 340 and the holding portion 360 and has a substantially cylindrical shape. At least a portion of the second cylindrical portion 350 is inserted into the first cylindrical portion 230 of the fixture 200. In detail, at least a portion of the second cylindrical portion 350 is inserted into the first cylindrical portion 230 together with the holding portion 360.

The holding part 360 is disposed at the lower end of the lower part 320 and is fitted to the inner circumferential surface of the first cylindrical part 230 when the abutment 300 is inserted into the fixture 200. The abutment 300 is temporarily held in the fixture 200. That is, the holding part 360 is temporarily held in the fixture while having an elastic difference between the upper and lower sides (upper and lower end). The holding part 360 is spaced apart from each other and is composed of a plurality of protrusions having elasticity. Each protrusion is projected downward in the state spaced apart from each other along the circumferential direction. The holding part 360 is configured such that at least one pair can be firmly fitted to the first cylindrical part 230.

The holding part 360 has a step 363 formed on an inner surface facing the fastening screw 400 so as to be spaced apart from the fastening screw 400 inserted into the fastening screw insertion hole 301 by a predetermined interval. Specifically, the holding portion 360 is provided with a stepped spaced apart from the fastening screw 400, the stepped 363 is located at the lower end of the abutment 300.

The holding part 360 includes a first part 361 and a second part 362. The first portion 361 is a portion in which the outer surface extends vertically, and the second portion 362 extends downward from the first portion 361 and the outer surface protrudes outward from the first portion 361. And the portion is forcibly fitted to the inner surface of the first cylindrical portion 230.

The step 363 is configured to include an inclined surface 3631 inclined downward in a direction away from the fastening screw 400 and a vertical surface 3632 vertically extended downward from the inclined surface 3631. The step 363 may be spaced apart from the fastening screw 400 to allow the holding part 360 to be elastically deformed toward the fastening screw, thereby increasing the elastic force of the holding part 360. In addition, even when a foreign matter exists between the abutment 300 and the fastening screw 400, the foreign matter has an advantage of preventing the pinching phenomenon between the abutment 300 and the fastening screw 400. .

However, the shape of the step is not limited thereto, and the step may include a horizontal plane extending horizontally away from the fastening screw 400 and a vertical plane extending downward from the horizontal plane.

In an embodiment of the present invention, reference numeral 400 denotes a fastening screw. The fastening screw 400 is screwed to the threaded portion 240 of the fixture 200 in the state in which the fastening screw insertion hole 301 of the abutment 300 is inserted into the abutment 300 It is for fixing to the fixture 200.

The implant structure 100 according to the embodiment of the present invention has the following effects.

First, after the fixture 200 is placed in the alveolar bone in the oral cavity, the abutment 300 is inserted into the fixture 200. Specifically, the holding portion 360, the second cylindrical portion 350, the second anti-rotation portion 340, and the tapered insertion portion 330 of the abutment 300 are inserted into the center groove of the fixture 200. do.

At this time, the holding portion 360 protruding outward from the inner diameter of the first cylindrical portion 230 of the fixture 200 is inserted into the first cylindrical portion 230 while being elastically deformed inward, so that The first cylindrical portion 230 can be fit inside. As such, when the holding part 360 is pressed against the first cylindrical part 230 of the fixture 200, the abutment 300 may be temporarily supported by the first cylindrical part 230. .

Meanwhile, the abutment 300 with respect to the fixture 200 is inserted while the second rotation preventing portion 340 of the abutment 300 is inserted into the first rotation preventing portion 220 of the fixture 200. The relative rotation can be prevented. That is, as the abutment 300 with respect to the fixture 200 is fitted as the second anti-rotation unit 340 made of a polygonal pillar is fitted into the first anti-rotation unit 220 formed of a polygonal groove. The rotation can be prevented.

Thereafter, the fastening screw 400 is inserted into the fastening screw insertion hole 301 of the abutment 300, and the lower end of the fastening screw 400 is screwed to the threaded portion 240 of the fixture 200. The abutment 300 is firmly coupled to the fixture 200.

The implant structure 100 of the present invention, by the coupling of the first cylindrical portion 230 and the holding portion 360 of the fixture 200 can be given a holding force and thereby secure the fastening recognition.

In addition, since the first cylindrical portion 230 of the fixture 200 has a structure without a groove, there is an advantage that can overcome the problems in the prior art, such as foreign matter and the strength of the fixture 200 during processing and placement.

In addition, due to interference between the holding portion 360 and the first cylindrical portion 230, there is an advantage that can be given a support force so that the abutment 300 is not pushed even during gingival interference.

In addition, a step exists in the inner surface of the holding part 360 to maximize the elastic force, and even if there is a foreign matter between the fastening screw 400 and the abutment 300, the fastening screw 400 is abutment There is an advantage that can be easily separated without being caught in (300).

The implant structure according to the present invention may be modified as follows.

9 and 10, the implant structure according to the present invention, the holding portion 360 ', the outer surface is recessed so that the outer surface away from the first cylindrical portion 230' extends downwardly A third part 364 and a lower part extending from the third part 364 and having an outer surface protruding outward to be fitted to the first cylindrical portion 230 'and having the step 363' provided on an inner surface thereof; It is also possible to consist of four parts 365.

11 and 12, in the implant structure of the present invention, the lower end of the second cylindrical part 350 may be disposed above the upper end of the first cylindrical part 230. At this time, the implant structure, as shown in Figure 11, the holding portion 360 ″, the outer diameter of the outer surface is maintained vertically extending downward and the step may be provided with the step (363 '') on the inner surface. . In addition, as shown in Figure 12, the holding portion 360 '' 'is provided with a concave groove 366 in the center of the outer surface, the stepped 363' '' is provided on the inner surface has a hook shape, An outer diameter of the lower end of the holding part 360 ″ ′ may be the same as the second cylindrical part 350.

In addition, in the implant structure 300 ″ according to the present invention, as shown in FIGS. 13 to 15, the holding part 370 ″ may be formed in a ring shape. At this time, it is preferable that the outer diameter of the ring-shaped holding part 370 "is larger than the inner diameter of the first cylindrical part 230 'of the fixture.

In addition, the implant structure 300 ′ ″ according to the present invention is shown in FIG. 16, and the holding part 370 ′ ″ maintains a temporary position in the first cylindrical portion 350 ′ ″. In order to have a larger outer diameter than the inner diameter of the first cylindrical portion (350 '' ') is made in a ring shape, the inner diameter of the holding portion 370' '' is also possible to be maintained the same as the inner diameter of the lower portion .

In the present invention, the implant structure and the abutment are exemplified in various embodiments, but the present invention is not limited thereto and may be extended and interpreted as long as it is reasonably interpreted according to the scope of the present invention.

Claims

The fixture is inserted into the alveolar bone while rotating about the central axis and serves as an artificial tooth root, and is coupled to the fixture to support the upper prosthesis, and extends from the top to the bottom in the interior, and a fastening screw insertion hole into which the fastening screw is inserted is formed. In an implant structure comprising an abutment,

The fixture is,

There is a central groove extending from the upper center to the lower side therein to be fitted with the abutment, the central groove has a tapered portion that narrows toward the lower side, and the first rotation preventing portion disposed below the tapered portion and the It includes a cylindrical first cylindrical portion disposed below the first anti-rotation portion,

The abutment,

An upper portion protruding to the outside of the fixture to which the upper prosthesis is attached;

A lower portion disposed below the upper portion and inserted into a central groove of the fixture; And

It is disposed at the lower end of the lower portion and is elastically deformed when the abutment is inserted into the fixture and is fitted to the inner circumferential surface of the first cylindrical portion, including a holding portion for temporarily holding the abutment inside the fixture ,

The holding part is provided with a stepped spaced apart from the fastening screw, the stepped implant structure, characterized in that located in the lower end of the abutment.
The method of claim 1,

The holding part is an implant structure, characterized in that formed in a plurality of protrusions spaced apart from each other along the circumferential direction.
The method of claim 1,

The holding unit is an implant structure, characterized in that formed in a ring shape.
The method of claim 1,

The holding unit,

A first portion whose outer surface extends vertically,

An implant structure, comprising: a second portion extending downward from the first portion, the outer surface protruding outward to be fitted to the first cylindrical portion, and the stepped portion being provided on the inner surface;
The method of claim 1,

The holding unit,

A third portion which is recessed to extend away from the first cylindrical portion and extends downward,

An implant structure, comprising: a fourth portion extending downward from the third portion, the outer surface protruding outward to be fitted to the first cylindrical portion, and the stepped portion being provided on the inner surface.
The method according to any one of claims 2 to 5,

The step is,

An inclined surface inclined downward in a direction away from the fastening screw;

Implant structure comprising a vertical surface extending vertically downward from the inclined surface.
The method according to any one of claims 2 to 5,

The step is,

A horizontal plane extending horizontally away from the fastening screw;

Implant structure comprising a vertical plane extending vertically downward from the horizontal plane.
The method of claim 1,

A second anti-rotation part disposed between the upper part and the holding part and inserted into the first anti-rotation part of the fixture to restrain the relative rotation of the abutment with respect to the fixture; Implant structure, characterized in that it is included.
The method of claim 8,

A lower portion of the abutment further includes a cylindrical cylindrical second portion between the second rotation preventing portion and the holding portion, the holding portion is characterized in that the implant extends downward from the second cylindrical portion Structure.
The method of claim 9,

The lower end of the second cylindrical portion is disposed above the upper end of the first cylindrical portion, the implant structure.
The method of claim 10,

The holding unit,

Implant structure, characterized in that the outer diameter of the outer surface is maintained vertically extending vertically and the step is provided on the inner surface.
The method of claim 10,

The holding portion is provided with a concave groove in the center of the outer surface, the stepped on the inner surface has a hook shape, the outer diameter of the lower end of the holding portion is an implant structure, characterized in that the same as the second cylindrical portion.
The method of claim 1,

The lower portion of the first cylindrical portion, the implant structure, characterized in that the threaded portion that can be screwed to the fastening screw inserted into the fastening screw insertion hole is provided.
Is inserted into the alveolar bone while rotating about the central axis serves as an artificial tooth root, there is provided a central hole extending from the upper center to the lower side to fit the abutment, the central hole, the first having a cylindrical shape In the abutment coupled to the fixture including a cylindrical portion, which supports the upper prosthesis and extends from the upper end to the lower end therein and includes a fastening screw insertion hole into which the fastening screw is inserted.

The abutment includes: an upper portion exposed to the outside of the fixture and to which an upper prosthesis is attached; A holding part disposed below the upper part to hold the abutment temporarily inside the fixture by being elastically deformed and inserted into the inner circumferential surface of the first cylindrical part when the abutment is inserted into the fixture,

The holding portion is provided with a stepped spaced apart from the fastening screw, the step is characterized in that the abutment is located at the lower end of the abutment.
The fixture is inserted into the alveolar bone while rotating about the central axis and serves as an artificial tooth root, and is coupled to the fixture to support the upper prosthesis, and extends from the top to the bottom in the interior, and a fastening screw insertion hole into which the fastening screw is inserted is formed. In an implant structure comprising an abutment,

The fixture is,

There is a central groove extending from the upper center to the lower side therein to be fitted with the abutment, the central groove has a tapered portion that narrows toward the lower side, and the first rotation preventing portion disposed below the tapered portion and the It includes a cylindrical first cylindrical portion disposed below the first anti-rotation portion,

The abutment,

An upper portion protruding to the outside of the fixture to which the upper prosthesis is attached;

A lower portion disposed below the upper portion and inserted into a central groove of the fixture;

And

It is disposed on the lower end of the lower portion and the elastic portion is deformed when the abutment is inserted into the fixture including a holding portion for temporarily holding the abutment in the interior of the fixture,

The holding part has an outer diameter larger than the inner diameter of the first cylindrical portion to maintain a temporary position in the first cylindrical portion is formed in a ring shape, the inner diameter of the holding portion is characterized in that the implant is maintained the same as the inner diameter of the lower portion Structure.