KR200345601Y1 - Abutment for repairing single tooth - Google Patents

Abstract

The present invention relates to a single tooth restorative abutment, and in particular, an elliptical inner surface extending between a circular screw seating surface and a prosthesis seating surface has an elliptical connection between the lower surface of the screw head and the screw head seating surface of the abutment. By removing the stepped portion formed on the surface to prevent loosening or fracture of the screw, it also facilitates the inner tube casting work, and the cast inner tube can be easily and quickly assembled on the abutment. It is about abutment which can be raised.

Description

Abutment for repairing single tooth}

The present invention relates to a single tooth restorative abutment, and in particular, an elliptical inner surface extending between a circular screw seating surface and a prosthesis seating surface has an elliptical connection between the lower surface of the screw head and the screw head seating surface of the abutment. By removing the stepped portion formed on the surface to prevent loosening or fracture of the screw, it also facilitates the inner tube casting work, and the cast inner tube can be easily and quickly assembled on the abutment. It is about abutment which can be raised.

Implant refers to a substitute that restores lost human tissue. In dentistry, the artificial tooth is fixed and implanted in the alveolar bone where the natural root has fallen so that it can replace the root (root) of the lost tooth. It means a substitute to restore function. As shown in FIG. 1, the implant system includes a fixture 3 largely implanted in the alveolar bone, an abutment 2 positioned at an upper end of the fixture, and the abutment 2. And a screw (1) inserted into the fixture 3 and fastening the two to each other.

The fixture (3) is formed on the outer circumferential surface of the thread (33a) is buried in the alveolar bone body 33 and the polygonal head portion 31 is located on the upper portion of the abutment (2) is located Have The fixture 3 also has a fastening hole 32 into which the screw 1 is inserted along its center. The abutment 2 is provided with a cavity 22 into which the screw 1 is inserted, and has a polygonal opening 24 at its lower end and is coupled with the head portion 31 of the fixture and has an inner tube on its outer surface. The inner tube 63 of the prosthesis 6 composed of the 63 and the exterior 62 is joined by Cement or the like. The screw 1 is inserted into the cavity portion 22 of the head portion 11, the abutment 2, and the fastening hole 32 of the fixture 3 to mutually abutment and fixture. It consists of a body portion 13 having a thread to fasten. As shown in Fig. 2, an abutment 2 having a polygonal opening 24 at its lower end is located on the head of the fixture 3, and the screw 1 is a cavity of the abutment 2; (22) is fastened to the fastening hole (32) of the fixture (3), the inner tube of the prosthesis (6) is seated on the polygonal inner tube support surface 21 and the prosthesis seating surface (23a) of the abutment (2) It is fixed by Cement. The abutment or implant system having such a configuration is disclosed in Republic of Korea Utility Model Publication No. 303350 (Application Oct. 17, 2002, Jan. 24, 2003. Utility Model Registration) "Abutment of Crown Implant" It is.

The abutment is fixed to the head portion 11 of the screw and the polygonal inner tube support surface 21 and the head portion 11 is seated on the upper end of the abutment due to the chewing force acting in various directions It is characterized by preventing screw loosening and fracture.

However, since the abutment 2 has a polygonal inner surface 21 of the polygon, when the head portion 11 of the screw 1 is seated on the screw head seating surface 21a, the stepped portion is shown in FIG. 2. A comes up. In order to fit the inner tube 63 to the stepped portion A, the inner tube must first be cast so that the corresponding stepped portion is formed. Furthermore, even after the casting of the inner tube having the stepped portion, it is difficult to manufacture the inner tube having the correct inner contour due to the casting characteristics. In the process of inserting and cementing the cast inner tube into the screw head and abutment with cement, it is often a problem that the inner surface of the inner tube needs to be machined secondly or the inner tube needs to be cast again due to poor assembly or incomplete assembly. Occurs. In addition, even if the inner tube is inserted and fixed through this process, the inner tube is not accurately positioned, which greatly reduces aesthetics and safety.

The present invention was devised to solve the problems of the conventional abutment, and the object of the present invention is to oval the lower surface of the screw head by elliptical inner surface extending between the circular screw seating surface and the prosthesis seating surface. The stepped portion formed on the joint surface between the screw head seating surface of the butt can be removed to prevent loosening or fracture of the screw, and to facilitate the inner pipe casting, and the cast inner pipe can be easily and quickly assembled on the abutment. It relates to abutments that can enhance aesthetics and safety during dental restorations.

1 is an exploded perspective view of a conventional single tooth restorative abutment used for screw loosening and fracture prevention, and a screw and fixture.

FIG. 2 is a longitudinal sectional view of the implant system in which the abutment, screw and fixture shown in FIG. 1 are assembled;

Figure 3 is an exploded perspective view of an implant system consisting of a single tooth restoration abutment, screw and fixture according to an embodiment of the present invention.

4A is a longitudinal sectional view of an implant system in which an abutment shown in FIG. 3 is fastened to a fixture using a screw.

4B is a plan view of the implant system of FIG. 4A.

4C is a cross-sectional view taken along the line A-A of FIG. 4A.

5 is a longitudinal cross-sectional view of a single tooth restored by mounting a prosthesis consisting of an inner tube and an exterior in an implant system including a single tooth restorative abutment in accordance with one embodiment of the present invention;

<Brief Description of Drawings>

1: screw 4: screw

11: Screwhead 41: Screwhead

11a: outer circumference 41a: outer circumference

13: screw 41 b: top view

2: abutment 41c: tool tightening groove

21: Polygonal inner tube ground 41d: Bottom

21a: screw head seating surface 42: torso

22: through-hole 43: screw thread

23: gingiva contact surface 5: abutment

23a: Prosthesis seating surface 51: Inner pipe ground

24: polygon groove 51a: screw head seating surface

3: fixture 52: penetration

32: Fastener 53: Prosthesis seating surface

31: polygon head 54: polygon groove

33: torso 55: gingiva contact surface

33a: Screw thread

The present invention is implemented by the embodiment having the following configuration to achieve the above object.

According to the first embodiment of the present invention, the abutment of the present invention, the inner abutment surface, the abutment outer surface consisting of the prosthesis seating surface and the gingiva contact surface, the screw head seating surface on which the head of the screw is seated, the screw is inserted The prosthesis on the screw head seating surface has a polygonal opening portion in which the cavity head and the polygon head head of the fixture are located, and the inner tube is not formed with a stepped portion on the joining surface of the head of the screw head and the screw head seating surface. It is characterized in that the elliptical shape that the long axis and short axis continuously increase to the seating surface.

According to the second embodiment of the present invention, the abutment of the present invention, in the first embodiment, characterized in that the screw head seating surface has a circular shape.

Applicants will now describe the above embodiments in detail with reference to FIGS. 3 to 5.

3 is an exploded perspective view of an implant system consisting of a single tooth restorative abutment, a screw and a fixture according to an embodiment of the present invention, and FIG. 4A shows the abutment shown in FIG. 4 is a plan view of the implant system of FIG. 4A, and FIG. 4C is a cross-sectional view along the line AA of FIG. 4A.

The abutment screw 4 is composed of a head portion 41, the body portion 42 and the screw portion 43. The head portion 41 has an outer circumferential surface 41a, an upper surface 41b, and a lower surface 41d. The inner circumferential surface of the inner tube is cement-bonded to the outer circumferential surface 41a, and the upper surface 41b Wrench coupling groove 41c to which the wrench is coupled is formed. Since the rest of the configuration and the fixture of the screw is the same as those of the conventional abutment screw and fixture, the applicant will not be described herein, and will be described only for the abutment which can be described as a feature of the present invention.

The abutment (5) is the abutment outer surface consisting of the inner pipe support surface 51, the prosthesis seating surface 53 and the gingiva contact surface 55, the screw head seating surface 51a on which the head 41 of the screw is seated ), A cavity 52 into which the screw 4 is inserted, and a polygonal opening 54 in which the polygon head 31 of the fixture 3 is located.

The screw head seating surface 51a is a surface in contact with the lower surface of the head 41 of the screw and has the same shape and size as the lower surface 41d so that the stepped portion is not formed as shown in FIG. 4A. Circular shape is suitable.

The inner tube supporting surface 51 is a surface on which the inner tube with a molded cross section is inserted and supported, and as shown in FIGS. 4B to 4C, from the outer circumference of the screw head seating surface 51a to the prosthesis seating surface 53. It has an elliptical shape in which the major and minor axes increase continuously. In this way, the inner bronchial surface is treated in an elliptical shape and the inner circumferential surface 51 is arranged so that the upper circumference of the inner circumferential surface is aligned continuously or in a line around the lower end of the outer surface 41c of the circular screw head portion 41. By positioning the inner tube 63 on the top and preventing rotation of the inner tube and at the same time preventing the formation of the stepped portion, the inner tube casting operation or the abutment mounting operation of the inner tube can be performed quickly and accurately.

As shown in FIG. 5, the polygon head portion 31 of the fixture is inserted into the polygon opening 54 of the abutment 5 to position the abutment 5 in the fixture, and then the screw 4. ) Is inserted into the cavity 52 and the fastening hole 32 to fasten the abutment and fixture. Then, the cast inner tube 63 is inserted to cement the outer surface 41a of the head portion 41 of the screw continuously and the inner tube support surface 51 with cement, and the outer surface 62 is then inserted into the inner tube ( The tooth restoration using the prosthesis 6 is completed by forming on 63). As such, since there is no stepped portion between the head of the screw and the upper end of the abutment, casting or mounting of the inner tube can be performed quickly and accurately, as well as improving aesthetics and safety.

In the above, the applicant has described various embodiments of the present invention, these embodiments are only one example of implementing the technical idea of the present invention, any modifications or modifications to the present invention as long as the technical idea of the present invention is implemented. It should not be considered further that it should be interpreted as falling within the scope of.

The present invention has the following effects by the above configuration.

The abutment of the present invention has an elliptical shape in which the inner bronchospheric surface is aligned in line with the outer surface of the head of the screw and its cross section gradually increases its long axis and short axis from the outer peripheral part of the screw head seating surface to the prosthesis seating surface. In addition, it is possible to prevent loosening or fracture of the screw, as well as to facilitate the casting and mounting of the inner pipe, and to ensure high aesthetics and safety.

Claims (2)

Abutment with inner abutment surface, prosthesis seating surface and gingiva contact surface, abutment outer surface, screw head seating surface on which the head of screw is seated, abutment where the screw is inserted and polygonal opening of the polygon head part of fixture In the inner pipe support surface, the long axis and the short axis of the cross-section is continuously increased from the screw head seating surface to the prosthesis seating surface so that the stepped portion is not formed on the joint surface of the screw head seating surface and the lower surface of the head of the screw The abutment characterized by the oval shape. The abutment according to claim 1, wherein the screw head seating surface has the same shape as the lower surface of the head of the screw and has a circular shape.