KR20210088884A - Abutment - Google Patents

Abstract

The present invention relates to an abutment. More specifically, the present invention relates to an abutment that can easily separate and combine a prosthesis and prevent a screw from loosening by combining the prosthesis by using a screw. The abutment according to the present invention comprises a fixture insertion part, an extended blade part, and a prosthetic coupling part. The fixture insertion part is inserted into a fixture. The extended blade portion extends radially from the fixture insertion portion to support the lower end of the prosthesis. The prosthetic coupling part has a tapered support part tapered and protruding from the extended blade part so as to be inserted into and supported by the prosthesis, so that the upper end does not support the prosthesis. Here, in the abutment, a through-hole penetrated in the axial direction is formed so that a screw portion of the screw is inserted to be coupled with the fixture so that a header of the screw presses the prosthesis to couple the prosthesis to the fixture. According to the present invention, since the prosthesis is coupled to the fixture by pressing the screw with the screw, coupling and separation of the prosthesis is easy. In addition, according to the present invention, the upper end of the abutment does not support the prosthesis when the prosthesis is pressed with a screw. Thus, the prosthesis acts as a spring washer to prevent the screw from separating from the fixture.

Description

abutment {Abutment}

The present invention relates to an abutment, and more particularly, to an abutment capable of easily separating and combining a prosthesis and preventing loosening of a screw by coupling a prosthesis using a screw.

A dental implant refers to an artificial tooth structure formed by planting an artificial root in the area where teeth have been partially or completely lost, attaching it to the alveolar bone, and fixing a prosthesis or crown to the artificial root. do. In general, an implant consists of a fixture made of titanium and an abutment fixed on the fixture.

The fixture is a site to be inserted into the alveolar bone to fix the implant, and the abutment is a site to be inserted into the fixture and to which the gums and prostheses are combined. At this time, the abutment is coupled to the fixture by means of a screw.

That is, the abutment is formed with a through hole so that the screw can be inserted therein, and after the screw is inserted into the through hole of the abutment, the screw formed at the lower end of the body of the screw is fastened to the screw portion of the fixture and coupled. The header of the screw then presses on the abutment to fix the abutment to the fixture. And the prosthesis is attached to the abutment using cement.

Registered Patent No. 10-1988194 (Registration Date June 04, 2019) Patent Publication No. 10-2015-0098666 (published on August 28, 2015) Registered Patent No. 10-1943437 (Registration Date January 23, 2019) Registered Patent No. 0-1881421 (Registration Date July 18, 2018) Publication No. 10-2018-0034384 (published on April 04, 2018) Patent Publication No. 10-2015-0036467 (published on April 07, 2015)

In the case of a conventional abutment, the prosthesis was attached with cement. Therefore, it is not only inconvenient to attach the prosthesis to the abutment, but also there is a problem in that it is difficult to separate only the prosthesis from the abutment when food residues are caught between the implant and the prosthesis and the prosthesis needs to be separated from the abutment.

The present invention is to solve the above problems. An object of the present invention is to provide an abutment capable of facilitating coupling and separation of a prosthesis by coupling the prosthesis to the abutment using a screw.

Another object of the present invention is to provide an abutment capable of minimizing damage to the prosthesis and preventing the screw from loosening when the prosthesis is coupled to the abutment using a screw.

Another object of the present invention is to provide an abutment capable of increasing the bondability between the prosthesis and the abutment even when the implant is placed in different directions from each other.

The abutment according to the present invention includes a fixture insertion part, an extended blade part, and a prosthetic coupling part. The fixture inserting unit is inserted into the fixture. The extended blade portion extends radially from the fixture insertion portion to support the lower end of the prosthesis. The prosthetic coupling part has a tapered support part tapered and protruding from the extended blade part so as to be inserted into the prosthesis and supported, so that the upper end does not support the prosthesis. Here, the abutment has a through-hole penetrating in the axial direction so that the screw portion of the screw is inserted so as to be engaged with the fixture so that the header of the screw presses the prosthesis to couple the prosthesis to the fixture.

In addition, in the abutment, it is preferable that a plurality of incisions cut from the upper part to the lower part are formed along the circumferential direction so that the tapered support part can be deformed in the radial direction when the prosthesis is pressed.

In addition, in the abutment, it is preferable that the prosthetic coupling portion further includes a locking jaw portion protruding upward from one side of the upper end of the tapered support portion.

In addition, in the abutment, a first groove along the circumferential direction at the boundary between the outer circumferential surface of the tapered support portion and the extended blade portion, and a second groove along the circumferential direction at the upper end of the outer circumferential surface of the tapered support portion are preferably formed Do.

In addition, in the abutment, it is preferable that the penis tape support portion is inclined at 10° to 40° with respect to the central axis.

In addition, in the abutment, it is preferable that the protruding portion is spaced apart from the prosthesis and not in contact with the prosthetic portion.

In addition, in the abutment, it is possible that the thickness of the extended blade portion varies from one side to the other so that the prosthetic coupling portion crawls at a predetermined angle from the fixture insertion portion.

According to the present invention, since the prosthesis is coupled to the fixture by pressing the screw with the screw, the coupling and separation of the prosthesis are easy.

In addition, according to the present invention, when the screw is not pressed when the abutment and the prosthesis are combined, the abutment can move freely, so that even if several implants are placed in different directions, the implant, the abutment, and the prosthesis easy to combine and separate.

In addition, according to the present invention, the upper end of the abutment does not support the prosthesis when the prosthesis is pressed with a screw. So the prosthesis acts as a spring washer to prevent the screw from separating from the fixture.

In addition, according to the present invention, a first groove and a second groove are formed in the abutment. Therefore, it is possible to prevent damage to the prosthesis by preventing contact between the prosthetic and the abutment at the weak part of the abutment due to the processing error of the abutment. is easily separated from the fixture.

1 is a perspective view of an abutment according to an embodiment of the present invention;
Figure 2 is a front view of the embodiment of Figure 1;
3 is a first cross-sectional view of the embodiment of FIG. 1 inserted into the fixture;
4 is a second cross-sectional view in which the embodiment of FIG. 1 is inserted into the fixture;
5 is a cross-sectional view of the embodiment of FIG. 1 coupled to a fixture using a screw;
FIG. 6 is an embodiment of a process for manufacturing the embodiment of FIG. 1 .
7 is a perspective view of another embodiment of the abutment according to the present invention.

An embodiment of the abutment according to the present invention will be described with reference to FIGS. 1 to 6 .

The abutment 5 according to the present invention includes a fixture insertion portion 10 , an extended blade portion 15 , and a prosthetic coupling portion 20 .

The fixture inserting part 10 is inserted into the fixture, and is generally composed of a hexa part and a tapered tapered part.

The extended blade part 15 is radially extended from the fixture insertion part 10 so as to support the lower end of the prosthesis 4 .

The prosthetic coupling part 20 includes a tapered support part 21 and a locking jaw part 23 . The tapered support part 21 is inserted into the prosthesis 4 and tapers and protrudes from the extended blade part 15 so as to support the prosthesis 4 . At this time, the tapered support 21 preferably has an inclination of 10 to 40° with respect to the central axis of the abutment 5 . Since the prosthetic coupling part 20 is coupled to the prosthetic 4 and the tapered tapered supporting part 21 , it is possible to increase the coupling force by increasing the frictional force with the prosthetic 4 . In addition, the tapered support part 21 has a plurality of incisions 22 cut from the top to the bottom along the circumferential direction so that when the prosthesis 4 presses the tapered support part 21, it can contract in the radial direction.

The locking jaw part 23 protrudes upward from one side of the upper end of the tapered support part 21 . At this time, the locking jaw part 23 protrudes upward so that its upper end does not come into contact with the prosthesis 4 supported by the prosthetic coupling part 20 . That is, neither the upper end 23a and the outer wall 23b of the locking jaw 23 do not touch the prosthesis 4 .

And in the prosthetic coupling part 20, the first groove 24 is formed along the circumferential direction at the boundary between the outer peripheral surface of the tapered support part 21 and the extended blade part 15, and at the upper end of the outer peripheral surface of the tapered support part 21 in the circumferential direction. A second groove 26 is formed along the The abutment 5 is first manufactured as shown in FIG. 6 when manufacturing. At this time, the boundary between the tapered support part 21 and the extended blade part 15 and the boundary between the tapered support part 21 and the locking jaw part 23 are difficult to process accurately. Therefore, the boundary 24' between the tapered support part 21 and the extended blade part 15 and the boundary 26' between the tapered support part 21 and the locking jaw part 23 protrude slightly due to processing difficulties. Then, when the prosthesis comes into contact with these boundaries 24' and 26', point contact is made at the boundaries 24' and 26', and the load is concentrated. In this case, there is a problem that the prosthesis 4 is damaged. Therefore, the first groove 24 and the second groove 26 are formed so as not to contact the prosthesis 4 at the boundaries 24' and 26'.

In addition, a cutting surface 27 is formed on at least one side of the prosthetic coupling part 20 so that the prosthetic 4 is not rotated when the prosthetic coupling part 20 is mounted on the prosthetic coupling part 20, and the threaded part 3b of the screw 3 passes through. A through hole is formed in the axial direction so as to be inserted so as to be coupled with the fixture (1).

In addition, since the prosthetic coupling part 20 of this embodiment is formed by the tapered support part 21 being tapered, the prosthesis 4 coupled thereto is also tapered. Therefore, in the case of the prosthesis 4, the inlet portion into which the abutment 5 is inserted is expanded. Therefore, it is possible to facilitate the combination of the prosthesis (4) and the abutment (5) even if the implants are placed in different directions.

After the fixture 1 is inserted into the fixture insertion part 10 of the abutment 5 of this embodiment, the prosthetic coupling part 20 is inserted into the prosthesis 4 . A through hole for inserting the screw 3 is also formed in the prosthesis 4 , and a protrusion 4a for being pressed against the header portion 3a of the screw 3 is formed in the through hole. Then, the tapered support part 21 of the prosthetic coupling part 20 comes into contact with the prosthesis 4 . A screw (3) is coupled to the fixture (1) to couple the abutment (5) and the prosthesis (4). Then, the header part 3a of the screw 3 presses the protrusion 4a of the prosthesis 4 , while the prosthesis 4 presses the tapered support part 21 of the prosthetic coupling part 20 . Since the tapered support part 21 is formed with a cutout 22 , it is deformed in a radial direction when pressed to increase the contact force with the prosthesis 4 . And since there is an empty space between the protrusion 4a of the prosthesis 4 and the prosthetic coupling part 20, when the header part 3a presses the protrusion 4a on the screw 3, the protrusion 4a functions as a spring washer. This prevents the screw (3) from loosening. In addition, since the abutment 5 has a first groove 24 and a second groove 26 formed therein, the point contact between the prosthesis 5 and the abutment 5 is prevented and the prosthesis 5 is damaged. prevents

In addition, when the prosthesis 4 presses the abutment 5, negative pressure is generated in the first groove 24 and the second groove 26, so when the screw 3 is released to separate the prosthesis 4, the prosthetic (4) and the abutment (5) are separated together, it is easy to release the abutment (5) from the fixture (1).

7 is another embodiment of the abutment according to the present invention.

7 is an embodiment in which the central axis of the prosthetic coupling part is not the same as the central axis of the fixture insertion part, but is inclined at a constant angle. 7, the thickness of the extended blade portion 15 is not the same, and the thickness varies from one side to the other. Depending on the state of the alveolar bone, the fixture cannot be implanted in the same way as the prosthesis, and the abutment of this embodiment is required when implanted at a different angle.

1: fixture 3: screw
3a: header part 3b: screw part
4: prosthesis 5: abutment
10: fixture insertion part 15: extension blade part
20: prosthetic coupling part 21: tapered support part
22: cutout 23: hooking jaw
23a: top 23b: outer wall
24: first groove 26: second groove
27: cutting surface

Claims (7)

A fixture insertion unit to be inserted into the fixture,
an extension blade extending radially from the fixture insertion portion to support the lower end of the prosthesis;
and a prosthetic coupling part whose upper end does not support the prosthesis by having a tapered support part tapered and protruding from the extended blade part so as to be inserted into and supported by the prosthesis,
An abutment having a through hole penetrating in an axial direction so that a screw portion of the screw is inserted to be engaged with the fixture so that the header of the screw presses the prosthesis to couple the prosthesis to the fixture. According to claim 1,
The tapered support portion is an abutment, characterized in that a plurality of incisions cut from the top to the bottom are formed along the circumferential direction so that the prosthesis can be deformed in the radial direction when the prosthetic is pressed. According to claim 2, wherein the prosthetic coupling portion
Abutment, characterized in that it further comprises a locking jaw protruding upward from one side of the upper end of the tapered support part 4. The method of claim 3,
A first groove in a circumferential direction at the boundary between the tapered support part and the outer peripheral surface of the extended blade part, and a second groove in the circumferential direction at the upper end of the outer peripheral surface of the tapered support part. 5. The method of claim 4,
The abutment, characterized in that the genital tape support is inclined at 10° to 40° with respect to the central axis. 6. The method of claim 5,
The abutment, characterized in that the protruding portion is spaced apart from the prosthesis so as not to come into contact with the prosthesis. 7. The method according to any one of claims 1 to 6,
The extended blade portion abutment, characterized in that the thickness changes from one side to the other side so that the prosthetic coupling portion crawls at a predetermined angle from the fixture insertion portion.

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