US4793808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enossal implant
Assignee: IMZ-FERTIGUNGS-UND VERTRIEBS-GESELLSCHAFT fur DENTALE TECHNOLOGIE MBH A GERMAN CORP
•
Filing: 1986-05-22
•
Granted: 1988-12-27
•
Expires: 2006-05-22
Abstract
Abstract The invention involves an enossal implant with comprehensive fastening devices for a firmly seated but, if necessary, removable tooth replacement that includes a fastening head and a implant post that can be connected to a base body. According to the invention, the fastening head is fitted with a tapering fitting surface in the direction of the tooth replacement; in particular, a conical surface, by which a reliable connection between the fastening head and the tooth replacement is obtained. Preferably, the fastening head can be rotated with respect to the base body, as with a ball-and-socket mechanism.
Inventors
- 👤 Axel Kirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:37
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/10; A61C8/00; A61C8/0018; A61C8/0048; A61C8/005; A61C8/0053; A61C8/0068; A61C8/0086
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
275 words
An enossal implant for removably fastening a removable tooth replacement comprising a base body, and an implant post for connection to said base body and for providing a connection for said tooth replacement, wherein the improvement comprises: said base body: (a) being substantially rigid and elongated; (b) having a closed bottom and an open top; (c) defining a recess therein; (d) defining shoulder means at said top and adjacent said open top for receiving mating shoulder means; and (e) having internal thread means in said recess adjacent said bottom; there being further provided: spacer means: (a) which are substantially cylindrical, hollow and have first and second spaced ends; (1) said first end constructed for engagement by an implant post; and (2) said second end defining shoulder means for mating engagement with said shoulder means on said base body; and (b) being removably mounted on said base body; said implant post being an elongated member constructed to fit within and extend from said base body and spacer means, said implant post defining a tooth replacement fastening head and cushion means for cushioning forces applied thereto, said post: (a) having an elongated body threaded at one end for engagement with said base body threads; (b) defining a fastening head at the other end of the post body; (c) defining spacer means engaging shoulder means for engaging the first end of said spacer means and urging said spacer means into engagement with said base body and for capturing said spacer means between the base body and the implant shoulder means; and (d) having cushioning means between said fastening head and threads for cushioning forces applied to said post.
Claim 2
Dependent Claim
275 words
An enossal implant for removably fastening a removable tooth replacement comprising a base body, and an implant post for connection to said base body and for providing a connection for said tooth replacement, wherein the improvement comprises: said base body: (a) being substantially rigid and elongated; (b) having a closed bottom and an open top; (c) defining a recess therein; (d) defining shoulder means at said top and adjacent said open top for receiving mating shoulder means; and (e) having internal thread means in said recess adjacent said bottom; there being further provided: spacer means: (a) which are substantially cylindrical, hollow and have first and second spaced ends; (1) said first end constructed for engagement by an implant post; and (2) said second end defining shoulder means for mating engagement with said shoulder means on said base body; and (b) being removably mounted on said base body; said implant post being an elongated member constructed to fit within and extend from said base body and spacer means, said implant post defining a tooth replacement fastening head and cushion means for cushioning forces applied thereto, said post: (a) having an elongated body threaded at one end for engagement with said base body threads; (b) defining a fastening head at the other end of the post body; (c) defining spacer means engaging shoulder means for engaging the first end of said spacer means and urging said spacer means into engagement with said base body and for capturing said spacer means between the base body and the implant shoulder means; and (d) having cushioning means between said fastening head and threads for cushioning forces applied to said post.
Claim 3
Dependent Claim
17 words
An implant as in claim 1, wherein said implant post is a unitary one-piece viscous-elastic synthetic member.
Claim 4
Dependent Claim
18 words
An implant as in claim 1, wherein said fastening head on said implant post has a ball-like shape.
Claim 5
Dependent Claim
26 words
An implant as in claim 3, wherein said base body is metallic an at least a portion of said post body is of an insulating material.
Claim 6
Dependent Claim
29 words
An implant as in claim 1, wherein said respective base body and spacer shoulder means cooperate and are constructed for centering said spacer means relative to said base body.
Claim 7
Dependent Claim
49 words
An implant as in claim 1, wherein said body shoulder means define an internal recess, an external shoulder and an internal shoulder and said spacer shoulder means define an external recess, an external shoulder and an internal shoulder and said shoulder means are constructed to interfit with each other.
Claim 8
Dependent Claim
28 words
An implant as in claim 1, wherein said implant post defines an area of reduced cross section adjacent said fastening head for cooperating in flexing and accommodating forces.
Claim 9
Dependent Claim
27 words
An implant as in claim 1, wherein said implant post shoulder defines a peripheral radially extending shoulder member for engaging said first end on said spacer means.
References Cited (Backward Citations)
US3473222A
Cited
US3589011A
Cited
US3732621A
Cited
US3708883A
Cited
US3863344A
Cited
DE2413883A1
Cited
US4011602A
Cited
US4446579A
Cited
SU1034734A1
Cited
US4518357A
Cited
US4474556A
Cited
EP0106815A1
Cited
US4552532A
Cited
US4609354A
Cited
US4568285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |