DENTAL IMPLANT

• US 20150157426A1
• Filed: 06/28/2013
• Published: 06/11/2015
• Est. Priority Date: 06/29/2012
• Status: Abandoned Application

• Current Assignee: Dentoz Co., Ltd.
• Original Assignee: Dentoz Co., Ltd.
• Inventors: Choi, Ho-Jun
• Application Number:
  US14/411,777
• Publication Number:
  US 20150157426A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61C 8/0037 Details of the shape
• CPC Class Codes: A61C 8/0045 with a stepped body
• CPC Class Codes: A61C 8/0048 Connecting the upper structure to the implant, e.g. bridging bars A61C8/0028 takes precedence
• CPC Class Codes: A61C 8/006 with polygonal positional means, e.g. hexagonal or octagonal
• CPC Class Codes: A61C 8/0063 with an internal sleeve
• CPC Class Codes: A61C 8/0068 with an additional screw
• CPC Class Codes: A61C 8/0069 tapered or conical connection

Abstract

Disclosed is a dental implant, in which a fixture and an abutment are together by a separate screw post so as to prevent a breakage of an implant screw tightening part and uniformly transmit forces over the entirety of a contact surface, to prevent stresses from being partially concentrated, and in which the screw-tightening direction between the fixture and the abutment is variable so as to improve the coupling force between them and fundamentally prevent a screw from becoming loosened. The dental implant includes a fixture and abutment, an abutment including a lower abutment to be fitted onto the fixture, and an upper abutment connected to an upper portion of the lower abutment, the lower abutment and the upper abutment being separate from each other. The upper abutment and the fixture are coupled and fixed by the screw post.

Claims

1. A dental implant 1, 1′

, or 1″

including a fixture 100, 100′

, or 100″

, where a screw thread 110 or 110′

is formed at an outer circumference, an abutment 200, 200′

, or 200″

which is inserted into the fixture 100, 100′

, or 100″

,

wherein the abutment 200, 200′

, or 200″

is divided into a lower abutment 210, 210′

, or 210″

which is inserted into the fixture 100, 100′

, or 100″

, and an upper abutment 220, 220′

, or 220″

which is connected to an upper part of the lower abutment 210, 210′

, or 210″

, and the upper abutment 220, 220′

, or 220″ and

the fixture 100, 100′

, and 100″

are coupled and fixed by the screw post 300, 300′

, or 300″

.

2. The dental implant of claim 1, wherein first and second female screws 122, 122′

, or 122″ and

222a, where a screw post 300, 300′

, or 300″

is coupled, are respectively formed in the fixture 100, 100′

, or 100″ and

the upper abutment 220, 220′

, or 220″

, and first and second male screws 312, 312′

, or 312″ and

314, 314′

, or 314″

are formed in the screw post 300, 300′

, or 300″

at a position corresponding to the first and second female screws 122, 122′

, or 122″ and

222a.

3. The dental implant of claim 2, wherein the first female screw 122, 122′

, or 122″ and

the first male screw 312, 312′

, or 312″

, and the second female screw 222a and the second male screw 314, 314′

, or 314″

are formed to have screw threads of opposite directions.

4. The dental implant of claim 2, wherein a projected part 224 is formed at a bottom of the upper abutment 220, and a placing groove 212, into which the projected part 224 is fitted, is formed at an upper end of the lower abutment 210.

5. The dental implant of claim 2, wherein an extension part 226, where a second female screw 222a has been formed at an inner circumference, is projected at the bottom of the upper abutment 220, and a insertion groove 213, into which the extension part 226 is inserted, is formed at the upper end of the lower abutment 210.

6. The dental implant of claim 2, wherein a coupling groove 219 is formed at a lower part of the lower abutment 210, and a fixing part 140, which is fitted onto the coupling groove 219, is projected at an upper end of the fixture 100.

7. The dental implant of claim 1, wherein a seating groove 250, 250′

, or 250″

of the upper abutment 220, 220′

, or 220″

is formed at an outer circumference, and a seating ridge 260, 260′

, or 260″

is formed at an outer circumference of the lower abutment 210, 210′

, or 210″

.

8. The dental implant of claim 2, wherein the screw post 300′

or 300″

comprises first and second male screws 312′

or 312″ and

314′

or 314″ and

a polygonal post 316′

or 316″

formed between the first and second male screws 312′

or 312″ and

314′

or 314″

.

9. The dental implant of claim 8, wherein a screw ring 320′

, where a second female screw 324′

is formed at an inner circumference and a third male screw 326′

is formed at an outer circumference, is formed at an outer circumference of the second male screw 315′

of the screw post 300′

, and a first coupling hole 222′

, where a third female screw 226′

, which is coupled with a third male screw 326′

, is formed, is formed in the upper abutment 220′

.

10. The dental implant of claim 9, wherein a fastener 330′

, where a fourth male screw 338′

is formed at an outer circumference, is fitted onto a post 316′

of the screw post 300′

, and a second coupling hole 212′

, where a fourth female screw 218′

, onto which a fourth male screw 338′

is fitted, is formed at the lower abutment 210′

.

11. The dental implant of claim 10, wherein a rotation prevention part 334′

formed of a polygonal shape is formed at a bottom part of the fastener 330′

, and a rotation prevention groove 134′

, into which the rotation prevention part 334′

is fitted onto, is formed at an upper part of the fixture 100′

.

12. The dental implant of claim 10, wherein a first step part 335 of a sawtooth shape, which is inclined upward toward a direction in which a screw post 300′

, which is coupled with an inner side of the fixture 100′

, is formed at a upper end of the fastener 330′

, and a first step ring 340′

, where a second step part 345′

of a shape corresponding to the first step part 335′

is formed at a lower end, is formed between the screw ring 320′ and

the fastener 330′

.

13. The dental implant of claim 10, wherein a screw direction of the first female screw 122′

and the first male screw 312′

is opposite to a screw direction of a screw thread 110′

, which is formed in the fixture 100′

, and second to fourth female screws 222a, 226′

, and 218′

, and second to fourth male screws 314′

, 326′

, and 338′

.

14. The dental implant of claim 8, wherein a first step part 215′

of a sawtooth shape, which is inclined upward toward a direction, in which a screw post 300″

, which is coupled with an inner side of the fixture 100″

, is loosened, is formed at an inside of the lower abutment 210″

, and a first step ring 340″

, where a second step part 345″

of a shape corresponding to the first step part 215″

is formed, is inserted into an inside of the lower abutment 210″

in the upper part of the first step part 215″

.

15. The dental implant of claim 1, wherein a third step part 217″

of a step shape including an inclined surface 217a″

, which is inclined upwards toward a direction in which a screw post 300″

, which is coupled at an inside of the fixture 100″

, is loosened, is formed at an upper end of the lower abutment, and a second step ring 350, where a fourth step part 355″

of a shape corresponding to a third step part 217″

is formed at a bottom, is installed between the lower abutment 210″ and

the upper abutment 220″

.