KR102198237B1 - Cenemtless dental implant using elastic bushing - Google Patents

Abstract

The present invention aims to provide a cement-free dental implant using an elastic bushing to firmly attach a crown to an abutment without using dental cement. Disclosed is a cement-free dental implant which comprises: an abutment having a screw insertion hole formed at the center thereof; a crown having a coupling part, into which an upper side of the abutment is inserted, formed in an inner lower side, a screw hole formed in an inner upper side, and a bushing hole formed in the inner upper side, wherein a stepped part is formed between the bushing hole and the screw hole; an elastic bushing inserted into the bushing hole of the crown, supported on the stepped part, and having elasticity to be opened in a radial direction; and an abutment screw inserted and fastened to the screw insertion hole of the abutment through the elastic bushing, and including an expanding head part integrally formed on an upper end thereof to enable the elastic bushing to be opened radially outward and to be supported on the bushing hole of the crown.

Description

Cementless dental implant using elastic bushing {CENEMTLESS DENTAL IMPLANT USING ELASTIC BUSHING}

The disclosed subject matter relates to a dental implant that is fixed to an alveolar bone to supplement a missing tooth.

Unless otherwise indicated herein, the contents described in this identification item are not prior art to the claims of this application, and description in this identification item is not admitted to be prior art.

In general, teeth are body tissues responsible for a mastication function that helps digestion by breaking or grinding food finely. If these teeth are lost, for example, due to tooth decay due to tooth decay, a problem with mastication occurs, and food cannot be chewed properly and digestion is difficult, making it difficult not only to eat food to the full, but also to smooth intake of nutrients. do. For this reason, teeth have been recognized as an important part of the body since ancient times, and play an important role in leading a healthy life.

Normally, humans have a total of 32 teeth, including 16 teeth in the maxilla and 16 teeth in the mandible, and the teeth created in infancy are replaced with permanent teeth once in childhood, and then oral activities are performed using permanent teeth for life. Perform.

Since human teeth are replaced with permanent teeth once in childhood, even if the teeth are lost, new teeth are no longer created, and thus the lost teeth or the surrounding tissues are repaired through prosthetic treatment at the dentist.

For example, in the case of universal prostheses such as bridges, partial dentures, dentures, etc., there is a problem of causing inconvenience in use due to foreign body sensation. For this reason, in recent years, dental implants are in the spotlight that allow all functions and appearances that are almost identical to those of natural teeth to be restored without damaging surrounding teeth or tissues when a tooth is damaged.

Dental implants are largely composed of a fixture fixed to the alveolar bone, an abutment coupled to the fixture, and a crown integrally coupled to the abutment. The fixture corresponds to the artificial tooth root embedded and fixed in the alveolar bone, the abutment serves to connect the fixture and the crown, and the crown corresponds to the artificial tooth that reproduces the same shape and function as the natural tooth.

The dental implant may include a fixture and an abutment in a separate type, or may include an implant fixture in which the fixture and an abutment are integrally formed. Further, in the dental implant, a fastening bolt for fastening and fixing the abutment to the fixture may be integrally formed with the abutment, or may be formed separately from the abutment.

In the case of the dental implant as described above, dental cement is applied to integrally couple the crown to the abutment.

As an example of such a dental implant, Korean Patent Publication No. 10-2004-0034874 (published on April 29, 2004) has an artificial tooth fixture with a hexagonal head protruding at the top and a fastening hole formed at the center of the upper end, and the artificial tooth fixture. A lower mounting base with a hexagonal groove formed in the center of which an insertion hole is connected to the top of the hexagonal head of and installed in communication with the hexagonal groove of the artificial tooth fixture in the lower part, and a threaded part in the lower part that is installed on the upper part of the lower mounting base. An abutment of an implant for a crown, which consists of an upper mounting stand formed and in which an artificial tooth bonded by dental cement to an upper outer periphery of the lower mounting stand and the upper mounting stand is installed is disclosed.

In addition, Korean Patent Publication No. 10-2009-0048078 (published on May 13, 2009) includes a fixture fixed to the alveolar bone, an abutment extending to the top of the fixture, an artificial tooth fitted to the abutment, and the Disclosed is a dental implant comprising a silver-containing dental cement interposed between an abutment and the artificial tooth to bond the abutment and the artificial tooth.

However, in the case of the dental implant as described above, since dental cement is essentially interposed between the abutment and the crown, it is difficult to completely remove the dental cement, and there is a problem that may cause inflammation around the abutment. .

Patent Document 1: Korean Patent Publication No. 10-2004-0034874 (published on April 29, 2004) Patent Document 2: Korean Patent Publication No. 10-2009-0048078 (published on May 13, 2009)

To provide a cementless dental implant using an elastic bushing that allows the crown to be firmly coupled to the abutment without using dental cement.

In addition, it is not limited to the technical problems as described above, and it is obvious that another technical problem may be derived from the following description.

Disclosed is an abutment in which a screw insertion hole is formed in the center, a coupling part into which the upper side of the abutment is inserted is formed on the lower side, a screw hole is formed in the inner center, and a bushing hole is formed in the inner upper side. A crown having a stepped portion formed between the bushing hole and the screw hole, an elastic bushing having elasticity so that it is inserted into the bushing hole of the crown and supported by the stepped portion and spread in a radial direction, and the elastic bushing is provided through the elastic bushing. An elastic bushing including an abutment screw that is inserted into and fastened into the screw insertion hole of the buttment and is integrally formed with an extended head portion to be supported by the stepped portion of the crown by spreading the elastic bushing radially outward at the top. The used cementless type dental implant is presented as an embodiment.

In addition, the disclosed contents include an abutment in which a screw insertion hole is formed in the center, a coupling part into which the upper side of the abutment is inserted is formed at the lower side of the inner side, and a bushing hole is formed at the upper side of the inner side, and between the bushing hole and the coupling part A crown having a stepped portion formed therein, an elastic bushing inserted into the bushing hole of the crown and supported by the stepped portion and having elasticity so that it can be opened in a radial direction, and a screw insertion hole of the abutment through the elastic bushing Cementless type dental implant using an elastic bushing including an abutment screw that is inserted and fastened and includes an abutment screw integrally formed with an extended head that opens the elastic bushing radially outward at the top to be supported on the stepped portion of the crown It is presented as another example.

In the cementless type dental implant using an elastic bushing according to the disclosed content, when the abutment screw is fastened, the extension head of the abutment screw is inserted into the elastic bushing and the elastic bushing is opened radially outwardly, As it is supported on the jaw, the crown can be firmly coupled to the abutment without using dental cement, and thus, there is an advantage in that inflammation caused by dental cement can be eliminated.

The effects of the present invention are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a cementless type dental implant using an elastic bushing according to an embodiment of the disclosed content.
Figure 2 is an exploded perspective view of a cementless type dental implant using an elastic bushing according to an embodiment of the disclosed content.
Figure 3 is an operation cross-sectional view of a cementless type dental implant using an elastic bushing according to an embodiment of the disclosed content.
4 to 8 are exploded perspective views of various modified embodiments of a cementless type dental implant using an elastic bushing according to an embodiment of the disclosed subject matter.
9 is a perspective view of a cementless type dental implant using an elastic bushing according to another embodiment of the disclosed content.
Figure 10 is an exploded perspective view of a cementless type dental implant using an elastic bushing according to another embodiment of the disclosed content.
11 is an operation cross-sectional view of a cementless type dental implant using an elastic bushing according to another embodiment of the disclosed subject matter.
12 is an exploded perspective view of a modified embodiment of a cementless type dental implant using an elastic bushing according to another embodiment of the disclosed subject matter.

Hereinafter, with reference to the accompanying drawings looks at the configuration and effects of the preferred embodiment. For reference, in the drawings below, each component is omitted or schematically illustrated for convenience and clarity, and the size of each component does not reflect the actual size. In addition, the same reference numerals refer to the same elements throughout the specification, and reference numerals for the same elements in individual drawings will be omitted.

1 is a perspective view of a cementless type dental implant using an elastic bushing according to an embodiment of the disclosed content, and FIG. 2 is an exploded perspective view of a cementless type dental implant using an elastic bushing according to an embodiment of the disclosed content 3 is a cross-sectional view of an operation of a cementless type dental implant using an elastic bushing according to an embodiment of the disclosure, and FIGS. 4 to 8 are cementless dental implants using an elastic bushing according to an embodiment of the disclosed content. It is an exploded perspective view of various modified embodiments of an implant.

A cementless type dental implant using an elastic bushing according to an embodiment of the disclosed subject matter is abutment 110, 110a, 110b having a screw insertion hole 111 formed in the center as shown in FIGS. 1 to 8 , 110c), and a coupling portion 121 into which the upper side of the abutment (110, 110a, 110b, 110c) is inserted is formed at the inner lower side, and a screw hole 123 is formed at the inner center, and a bushing hole ( 125) is formed and a stepped portion 127 is formed between the bushing hole 125 and the screw hole 123, and the crown 120 is inserted into the bushing hole 125 of the crown 120 to form the stepped portion 127 The screw insertion hole of the abutment (110, 110a, 110b, 110c) through the elastic bushings (130, 130') and elastic bushings (130, 130') that are supported by and have elasticity so that they can spread in the radial direction An extension head 141 is integrally formed at the upper end to be inserted into and fastened to be supported by the bushing hole 125 of the crown 120 by spreading the elastic bushings 130 and 130 ′ radially outward. It includes abutment screws 140 and 140'.

Here, the abutment (110, 110a, 110b, 110c) corresponds to a connection support for connecting and fixing the crown 120 corresponding to the artificial tooth to the fixture 3 embedded in the alveolar bone, and the abutment in the center Screw insertion holes 111 for fastening the screws 140 and 140' are formed.

The abutments 110 and 110a may be formed of a general abutment in which the lower side is inserted into the fixture 3 embedded and fixed in the alveolar bone as shown in FIGS. 2 and 4. In this case, the screw insertion hole 111 is formed through the entire length of the abutment 110, 110a, and is formed as a through hole having a larger inner diameter than the body of the abutment screw 140, 140'. In addition, as shown in FIG. 4, the abutment 110a may have an elastic coupling protrusion 115 that can open outward in the radial direction by a vertical slit 113 partially cut at a predetermined angular interval around the top. have. The elastic coupling protrusion 115 may be coupled to an elastic coupling groove (not shown) formed in the inner wall of the screw hole 123 of the crown 120.

In addition, the abutment (110b, 110c) is a fastening bolt-integrated abutment in which a fastening bolt part 117 fastened to the fixture 3 embedded and fixed in the alveolar bone is integrally provided on the lower side as shown in FIGS. 5 and 6 It may also be formed of ment. In this case, the screw insertion hole 111 is formed as a screw hole whose lower end is closed. In addition, the abutment 110c may be formed with an elastic coupling protrusion 115 that can open outward in the radial direction by the vertical slit 113 partially cut at a predetermined angle around the top. The elastic coupling protrusion 115 may be coupled to an elastic coupling groove (not shown) formed in the inner wall of the screw hole 123 of the crown 120.

In addition, although not shown, the abutment may be formed in the form of an implant fixture in which a fixture and abutment are integrally formed.

The crown 120 is coupled to the upper side of the abutment 110, 110a, 110b, and 110c described above. The crown 120 corresponds to an artificial tooth connected to and fixed to the abutments 110, 110a, 110b, and 110c.

The inner lower side of the crown 120 is formed with a coupling portion 121 into which the upper side of the abutment (110, 110a, 110b, 110c) is inserted. The coupling portion 121 may have, for example, a shape whose inner diameter is reduced toward the top so as to correspond to the upper shape of the abutments 110, 110a, 110b, and 110c.

A screw hole 123 is formed in the inner center of the crown 120. The screw hole 123 is a portion into which abutment screws 140 and 140 ′ to be described later are inserted or a rotary tool for rotation of the abutment screws 140 and 140 ′ is inserted. Although it is formed through the vertical direction to communicate with 121, in the case of an inclined implant, it may be formed to be inclined to communicate with the coupling portion 121.

A bushing hole 125 is formed on the inner upper side of the crown 120. The bushing hole 125 forms an accommodation space in which the elastic bushings 130 and 130 ′, which will be described later, are inserted, and at the same time, the elastic bushings 130 and 130 ′ are fastened with the abutment screws 140 and 140 ′. It is a type of coupling hole in which the outer circumferential surface of the elastic bushing (130, 130') is tightly fixed while spreading outward in the radial direction. The inner diameter is formed as a circular hole, but the lower side has a shape that gradually decreases as it goes to the bottom. .

A stepped portion 127 is formed between the bushing hole 125 and the screw hole 123. The stepped portion 127 corresponds to a supporting step that supports the elastic bushings 130 and 130' inserted in the bushing hole 125 so that they cannot be moved downward any more, and the bushing hole 125 and the screw hole 123 ) To communicate.

The elastic bushings 130 and 130 ′ are inserted into the bushing hole 125 of the crown 120 and supported by the stepped portion 127 of the crown 120. The elastic bushings 130 and 130 ′ expand in the radial direction when the abutment screws 140 and 140 ′ to be described later are inserted and fastened, and are in close contact with the inner wall of the bushing hole 125 so that the crown 120 The abutment (110, 110a, 110b, 110c) is to be firmly connected and fixed to the abutment (110, 110a, 110b, 110c) without the use of dental cement.

As shown in FIGS. 2 to 6, the elastic bushing 130 has an incision 131 formed on one side and one or more partial incisions 133 cut in a predetermined length from the top to the bottom on the other side. , It is preferable to have a shape in which a stepped support part 135 that narrows downwards so as to correspond to the stepped part 127 of the crown 120 is formed at the lower end.

In addition, the elastic bushing 130 ′ is formed in a ring shape in which the cutout 131 is not formed, as shown in FIGS. 7 and 8, but two or more partial cutouts cut by a predetermined length from the top to the bottom ( It may be formed in a structure in which the elastic expansion protrusions 339 that are spaced apart from each other and can be opened in the radial direction are formed between the partial cutouts 333. The lower end of the elastic bushing 130 ′ is supported by the stepped portion 127 of the crown 120.

The abutment screws 140 and 140' are inserted into the screw insertion holes 111 of the abutments 110, 110a, 110b, and 110c through the above-described elastic bushings 130 and 130'. The abutment screws 140 and 140 ′ pass through the elastic bushings 130 and 130 ′ and the screw insertion hole 111 so that the lower side is fastened and fixed in the fixture 3, so that the crown 120 becomes the abutment 110, 110a) and at the same time the abutment (110, 110a) is fastened and fixed to the fixture 3 (corresponding to the reference numeral 140) or through the elastic bushings (130, 130') and screw insertion holes ( 111) while being directly fastened and fixed to the crown 120 is fixed to the abutment (110b, 110c) under pressure (corresponding to the reference numeral 140').

The abutment screws 140 and 140 ′ are fastened and fixed in the fixture 3 or the abutment screws 140 and 140 ′ are fastened and fixed in the screw insertion holes 111 of the abutments 110b and 110c. A thread is formed around the lower circumference.

In addition, when the abutment screws 140 and 140 ′ are fastened to the upper side of the abutment screws 140 and 140 ′, the elastic bushings 130 and 130 ′ expand outward in the radial direction within the bushing hole 125. An extended head part 141 is provided to induce tightly fixed to the inner wall of the bushing hole 125 of the crown 120.

It is preferable that the extension head 141 has an inverted truncated cone shape whose outer diameter decreases toward the bottom, but when the abutment screws 140 and 140 ′ are fastened, the elastic bushings 130 and 130 ′ have a bushing hole ( 125) Any shape is irrelevant as long as it can spread outward in the radial direction.

Hereinafter, the overall operation of the cementless type dental implant using an elastic bushing according to an embodiment of the disclosed subject matter will be described with reference to FIGS. 1 to 8.

The abutment (110, 110a, 110b, 110c) on the crown 120 is coupled and the abutment screw (140, 140') is inserted into the elastic bushing (130, 130'), the elastic bushing (130, 130'), and insert the abutment screws 140, 140' through the bushing hole 125 and screw hole 123 of the crown 120, and the screw insertion hole of the abutment 110, 110a, 110b, 110c Insert into (111) and fasten.

At this time, the elastic bushings 130 and 130 ′ are inserted into the bushing hole 125 of the crown 120 and supported by the stepped portion 127, and the lower side of the abutment screws 140 and 140 ′ is the fixture 3 The expansion head 141 of the abutment screws 140 and 140 ′ flows into the elastic bushings 130 and 130 ′ while being fastened and fixed directly within the screw insertion hole 111, and at the same time, the elastic bushing 130 As the elastic bushings 130 and 130 ′ are in close contact with the inner wall of the bushing hole 125 as the elastic bushings 130 and 130 ′ spread outward in the radial direction, the abutment 110, 110a, 110b without using dental cement The crown 120 may be firmly coupled to 110c), and thus, inflammation caused by dental cement may be eliminated.

9 is a perspective view of a cementless type dental implant using an elastic bushing according to another embodiment of the disclosed content, and FIG. 10 is an exploded perspective view of a cementless type dental implant using an elastic bushing according to another embodiment of the disclosed content , FIG. 11 is a cross-sectional view of an operation of a cementless type dental implant using an elastic bushing according to another embodiment of the disclosed subject matter, and FIG. 10 is a modification of a cementless type dental implant using an elastic bushing according to another embodiment of the disclosed content. It is an exploded perspective view of an embodiment.

A cementless type dental implant using an elastic bushing according to another embodiment of the disclosed subject matter includes an abutment 210 having a screw insertion hole 211 formed in the center as shown in FIGS. 9 to 12, and A coupling portion 221 into which the upper side of the abutment 210 is inserted is formed on the lower side, and a bushing hole 225 is formed on the inner upper side, and a stepped portion 227 is formed between the bushing hole 225 and the coupling portion 221 The crown 220 is formed, and is inserted into the bushing hole 225 of the crown 220, supported by the stepped portion 227, and elastic bushings 230 and 230 ′ having elasticity so that they can open in the radial direction, , Through the elastic bushings 230 and 230', it is inserted into the screw insertion hole 211 of the abutment 210 and is fastened, and the elastic bushings 230 and 230' at the top are opened to the outside in the radial direction so that the crown 220 It includes an abutment screw 240 integrally formed with an extension head 241 to be supported in the bushing hole 225 of ).

Here, the abutment 210 corresponds to a connection support for connecting and fixing the crown 220 corresponding to the artificial tooth to the fixture 3 embedded and fixed in the alveolar bone, and the abutment screw 240 is fastened in the center. A screw insertion hole 211 for is formed.

The abutment 210 is shown only as a general abutment in which the lower side is inserted into the fixture 3 that is embedded and fixed in the alveolar bone, but the abutment 210 is opened radially outward by a vertical slit partially cut at a predetermined angle around the upper circumference. An elastic coupling protrusion that can be formed may be formed, or may be formed as a fastening bolt-integrated abutment integrally provided on the lower side of the fastening bolt part.

The crown 220 is coupled to the upper side of the abutment 210 described above. The crown 220 corresponds to an artificial tooth connected and fixed to the abutment 210.

A coupling portion 221 into which the upper side of the abutment 210 is inserted is formed at the inner lower side of the crown 220. The coupling portion 221 may have, for example, a shape in which an inner diameter decreases toward the top so as to correspond to the upper shape of the abutment 210.

A bushing hole 225 is formed on the inner upper side of the crown 220. The bushing hole 225 forms an accommodation space in which the elastic bushings 230 and 230 ′, which will be described later, are inserted, and at the same time, the elastic bushings 230 and 230 ′ have a radius when the abutment screw 240 is fastened. It is a type of coupling hole in which the outer circumferential surface of the elastic bushings 230 and 230 ′ is tightly fixed while spreading outward in the direction, and is formed as a circular hole having a constant inner diameter, but the lower side has a shape in which the inner diameter gradually decreases toward the bottom.

A stepped portion 227 is formed between the bushing hole 225 and the screw hole 223. The stepped portion 227 corresponds to a supporting step for supporting the elastic bushings 230 and 230' inserted in the bushing hole 225 so that they cannot be moved downward any more, and the bushing hole 225 and the screw hole 223 ) To communicate.

Elastic bushings 230 and 230 ′ are inserted into the bushing holes 225 of the crown 220 and are supported by the stepped portions 227 of the crown 220. The elastic bushings 230 and 230 ′ spread in the radial direction when the abutment screw 240 to be described later is inserted and fastened, and the crown 220 is fixed in close contact with the inner wall of the bushing hole 225, so that the crown 220 It is preferable to have elasticity so as to be firmly connected and fixed to the abutment 210 without the use of, and can be opened in the radial direction.

As shown in FIGS. 10 and 11, the elastic bushing 230 is formed with a cutout 231 that is cut over the entire vertical length on one side, and one or more parts cut by a certain length from the top to the bottom on the other side A cutout portion 233 is formed, and a stepped support portion 235 narrowing downward to correspond to the stepped portion 227 of the crown 220 is formed in the center, and a screw of the abutment 210 is formed at the lower portion. A downward protrusion 237 extending into the insertion hole 211 is formed. At this time, the upper end of the screw insertion hole 211 of the abutment 210 is formed to communicate with the protruding portion insertion stepped portion 213, which is inserted and supported by the downward projection 237 of the elastic bushing 230.

The elastic bushing 230' is formed in a ring shape that is not cut across the entire vertical length, as shown in FIG. 12, and two or more partial cutouts 233 cut apart by a certain length from the top to the bottom are formed apart. It may be formed in a structure in which an elastic expansion protrusion 239 that can be opened in a radial direction is formed between the partial cutouts 233. At this time, the upper end of the screw insertion hole 211 of the abutment 210 is formed to communicate with the protrusion insertion step 213 that is supported by inserting the lower end of the elastic bushing 230'.

The abutment screw 240 is inserted into and fastened to the screw insertion hole 211 of the abutment 210 through the elastic bushings 230 and 230'. The abutment screw 240 passes through the elastic bushings 230 and 230' and the screw insertion hole 211, and the lower side is fastened and fixed in the fixture 3, while the crown 220 is pressurized and fixed to the abutment 210. At the same time, the abutment 210 is fastened and fixed to the fixture 3.

A thread is formed around the lower circumference of the abutment screw 240 so that the abutment screw 240 is fastened and fixed in the fixture 3. In addition, when the abutment screw 240 is fastened to the upper side of the abutment screw 240, the elastic bushings 230 and 230 ′ in the bushing hole 225 open radially outward, and the bushing of the crown 220 An extended head portion 241 that guides the hole 225 to be tightly fixed to the inner wall of the hole 225 is provided.

It is preferable that the extension head 241 has an inverted truncated cone shape whose outer diameter decreases toward the bottom, but when the abutment screw 240 is fastened, the elastic bushings 230 and 230 ′ are inside the bushing hole 225. Any shape is irrelevant as long as it can spread outward in the radial direction at

In addition, the abutment screw 240 is shown to pass through the elastic bushings 230 and 230' and the screw insertion hole 211 so that the lower side is fastened and fixed in the fixture 3, but the abutment is fixed to the fixture 3 When the fastening bolt portion to be fastened to is formed of a fastening bolt-integrated abutment integrally provided, it may be directly fastened and fixed in the screw insertion hole 211 through the elastic bushings 230 and 230. In the former case, the screw insertion hole 211 is formed as a through hole, but in the latter case, the screw insertion hole 211 is formed not as a through hole, but as a screw hole whose lower end is closed.

A cementless type dental implant using an elastic bushing according to another embodiment of the disclosed subject matter does not have a screw hole interposed between the coupling portion 221 of the crown and the bushing hole 225, and the elastic bushings 230 and 230 The lower side of the abutment 210 extends into the screw insertion hole 211 of the abutment 210, and at the upper end of the screw insertion hole 211 of the abutment 210, the lower side of the elastic bushings 230 and 230' is seated and supported. The insertion step 213 is the same as the cementless type dental implant using the elastic bushing according to an embodiment of the disclosed content except for the communication, so here, for the sake of simplification of the specification, the description is no longer repeated. I decided to skip it.

Although preferred embodiments of the present invention have been described with reference to the accompanying drawings, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and represent all the technical ideas of the present invention. Since it is not, it should be understood that there may be various equivalents and modifications that may be substituted for them at the time of application. Therefore, the embodiments described above should be understood as illustrative and non-limiting in all respects, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims and the All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

3: Fixture
110, 110a, 110b, 110c, 210: abutment
111, 211: screw insertion hole
113: vertical slit
115: elastic coupling protrusion
117: fastening bolt part
213: protrusion insertion stepped portion
120, 220: crown
121, 221: coupling part
123: screw hole
125, 225: bushing hole
127, 227: stepped part
130. 130', 230, 230': elastic bushing
131, 231: incision
133, 233: partial incision
135, 235: stepped support
237: downward protrusion
239: elastic expansion protrusion
140, 140', 240: abutment screw
141, 241: extended head

Claims (8)

An abutment having a screw insertion hole formed in the center;
A crown in which a coupling portion into which the upper side of the abutment is inserted is formed at an inner lower side, a screw hole is formed at an inner center, a bushing hole is formed at an inner upper side, and a stepped portion is formed between the bushing hole and the screw hole;
An elastic bushing inserted into the bushing hole of the crown, supported by the stepped portion, and having elasticity so as to spread in a radial direction;
An abutment which is inserted into and fastened through the elastic bushing into the screw insertion hole of the abutment, and has an extension head integrally formed at an upper end to allow the elastic bushing to open outward in the radial direction to be supported by the bushing hole of the crown Including a screw,
The elastic bushing is formed in a ring shape, wherein two or more partial incisions cut by a certain length from the top to the bottom are spaced apart, and elastic expansion protrusions that can be opened in the radial direction are formed between the partial incisions. Cementless dental implant using delete delete An abutment having a screw insertion hole formed in the center;
A crown in which a coupling portion into which the upper side of the abutment is inserted is formed at an inner lower side, a bushing hole is formed at an inner upper side, and a stepped portion is formed between the bushing hole and the coupling portion;
An elastic bushing inserted into the bushing hole of the crown, supported by the stepped portion, and having elasticity so as to spread in a radial direction;
An abutment which is inserted into and fastened through the elastic bushing into the screw insertion hole of the abutment, and has an extension head integrally formed at an upper end to allow the elastic bushing to open outward in the radial direction to be supported by the bushing hole of the crown Including a screw,
The elastic bushing is formed in a ring shape, and at the upper side, two or more partial incisions cut by a certain length from the top to the bottom are spaced apart, and elastic expansion protrusions that can be opened in the radial direction are formed between the partial incisions. The lower side is a cementless type dental implant using an elastic bushing extending into the screw insertion hole of the abutment. delete delete delete The method of claim 4,
Cementless type dental implant using an elastic bushing, characterized in that the upper end of the screw insertion hole of the abutment is formed to communicate with the protrusion insertion stepped portion to which the lower side of the elastic bushing is seated and supported.

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