Patent US5052931A successfully refreshed from Google Patents.
US5052931A
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Enossal implant
Assignee: IMZ Fertigungs und Vertriebsgesellschaft fuer dentale Technologie mbH
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Filing: 1989-12-08
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Granted: 1991-10-01
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Expires: 2009-12-08
Abstract
Abstract An enossal implant with an implantable basic structure and an implant postonnected thereto characterized by the basic structure having an axial bore receiving a rigid inner sleeve which has an axial bore receiving the implant post.
Inventors
- 👤 Axel Kirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:24
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0048; A61C8/005; A61C8/0063; A61B; A61B17/00; A61B17/56; A61C8/0018; A61C8/0037; A61C8/0045; A61C8/006
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
201 words
An enossal implant comprising an implantable basic structure having an axially extending bore with internal threads, a rigid inner sleeve being provided with external threads and being detachably secured in the bore of the basic structure by being threaded therein, said inner sleeve having an axially extending bore, an implant post being inserted into the axial bore of the inner sleeve to be connectible to the basic structure, said axial bore of the inner sleeve having an upper portion with engagement means for the engagement by a corresponding wrench, the basic structure and the inner sleeve being made of the same metal selected from a group consisting of titanium and titanium alloys, and a spacer sleeve being providing on an upper end of the basic structure as an extension thereof, said inner sleeve having a ring flange adjacent an upper end for engaging and holding said spacer sleeve on said basic structure, said spacer sleeve having the same external diameter as the basic structure at said upper end, and said spacer sleeve being made from an electrically insulating material selected from a group consisting of aluminum oxide, magnesium oxide, zirconium dioxide, and combinations of magnesium oxide, aluminum oxide and zirconium dioxide.
Claim 2
Dependent Claim
201 words
An enossal implant comprising an implantable basic structure having an axially extending bore with internal threads, a rigid inner sleeve being provided with external threads and being detachably secured in the bore of the basic structure by being threaded therein, said inner sleeve having an axially extending bore, an implant post being inserted into the axial bore of the inner sleeve to be connectible to the basic structure, said axial bore of the inner sleeve having an upper portion with engagement means for the engagement by a corresponding wrench, the basic structure and the inner sleeve being made of the same metal selected from a group consisting of titanium and titanium alloys, and a spacer sleeve being providing on an upper end of the basic structure as an extension thereof, said inner sleeve having a ring flange adjacent an upper end for engaging and holding said spacer sleeve on said basic structure, said spacer sleeve having the same external diameter as the basic structure at said upper end, and said spacer sleeve being made from an electrically insulating material selected from a group consisting of aluminum oxide, magnesium oxide, zirconium dioxide, and combinations of magnesium oxide, aluminum oxide and zirconium dioxide.
Claim 3
Dependent Claim
20 words
An implant according to claim 1, wherein the inner sleeve is connected to the basic structure in a bayonet-like manner.
Claim 4
Dependent Claim
39 words
An implant according to claim 1, wherein the basic structure has an external surface having at least two portions interconnected by a step with the smaller of said two portions being towards a lower end of the basic structure.
Claim 5
Dependent Claim
19 words
An implant according to claim 1, wherein an outer circumferential surface of the basic structure is provided with lacunae.
Claim 6
Dependent Claim
18 words
An implant according to claim 1, wherein the basic structure has an external coating of a tissue-friendly material.
Claim 7
Dependent Claim
16 words
An implant according to claim 5, wherein said coating is a plasma coating of hydroxyl apatite.
Claim 8
Dependent Claim
18 words
An implant according to claim 1, wherein the implant post is constructed as an elastically deformable plastic element.
Claim 9
Dependent Claim
40 words
An implant according to claim 1, wherein the axial bore of the inner sleeve has an internal thread and said implant post is provided with an external thread engageable on the internal thread to secure the post in said sleeve.
Claim 10
Dependent Claim
20 words
An implant according to claim 1, wherein the implant post is bonded to the axial bore of the inner sleeve.
Claim 11
Dependent Claim
20 words
An implant according to claim 1, wherein the implant post is cemented into the axial bore of the inner sleeve.
Claim 12
Dependent Claim
15 words
An implant according to claim 1, wherein the engagement means includes radially extending blind bores.
Claim 13
Dependent Claim
24 words
An implant according to claim 11, wherein the engagement means includes the upper portion of the axial bore having a polygonal internal cross section.
Claim 14
Dependent Claim
16 words
An implant according to claim 12, wherein the upper portion has a hexagonal internal cross section.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |