Patent US5169308A successfully refreshed from Google Patents.
US5169308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for tooth implantation
Assignee: CREDENTUS LASARETTSVAGEN 7 S-131 45 NACKA SWEDEN A CORP OF SWEDEN AB
•
Filing: 1990-12-21
•
Granted: 1992-12-08
•
Expires: 2010-12-21
Abstract
Abstract A device for tooth implantation having a fixture part intended to be set into the jawbone, and a holder part to which the tooth crown is attached. The holder part can be screwed on the fixture part by an attachment screw, and a locking screw is disposed to lock the attachment screw for fastening the holder part to the fixture part and prevent unscrewing.
Inventors
- 👤 Bjorn Kvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:34
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0048; A61C8/005; A61C8/0066; A61C8/0068; A61C8/006
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
97 words
A device for tooth implantation comprising: a fixture part having a threaded bore; a holder part having a threaded bore; a locking screw disposed in the threaded bore of said holder part; an attachment screw having a head portion disposed in the threaded bore of said holder part contiguous to said locking screw, and a threaded end portion attachable to the threaded bore of said fixture part; said locking screw and said attachment screw being oppositely threaded so that when said attachment screw tends to unscrew said locking screw locks and secures said attachment screw in place.
Claim 2
Independent Claim
97 words
A device for tooth implantation comprising: a fixture part having a threaded bore; a holder part having a threaded bore; a locking screw disposed in the threaded bore of said holder part; an attachment screw having a head portion disposed in the threaded bore of said holder part contiguous to said locking screw, and a threaded end portion attachable to the threaded bore of said fixture part; said locking screw and said attachment screw being oppositely threaded so that when said attachment screw tends to unscrew said locking screw locks and secures said attachment screw in place.
Claim 3
Dependent Claim
17 words
The device according to claim 1, wherein the attachment screw is right-threaded and the locking screw left-threaded.
Claim 4
Dependent Claim
21 words
The device according to claim 1 wherein the holder part includes a conical portion to which the tooth crown is attached.
Claim 5
Dependent Claim
18 words
The device according to claim 3, wherein the conical portion has a cone angle between 5° and 15°.
Claim 6
Dependent Claim
16 words
The device according to claim 4 wherein the cross section of the conical portion is non-circular.
Claim 7
Dependent Claim
16 words
The device according to claim 3 wherein the cross section of the conical portion is non-circular.
Claim 8
Dependent Claim
17 words
The device according to claim 6, wherein said cross section is quadrangular, preferably with rounded out corners.
Claim 9
Dependent Claim
17 words
The device according to claim 6, wherein said cross section is hexagonal, preferably with rounded out corners.
Claim 10
Dependent Claim
40 words
The device according to claim 1 further comprising a plurality of teeth forming a bridge secured to the fixture part by a plurality of screws, wherein the locking screws are disposed to lock at least some of the attachment screws.
References Cited (Backward Citations)
US583565A
Cited
US4330891A
Cited
US4468200A
Cited
EP0216031A1
Cited
SE450335B
Cited
US4758161A
Cited
US4863383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |