Patent FR2532948A1 successfully refreshed from Google Patents.
US5026280A
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US
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Enossal implant with an elastic intermediate element and a metal spacer element
Assignee: IMZ Fertigungs und Vertriebsgesellschaft fuer dentale Technologie mbH
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Filing: 1989-11-22
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Granted: 1991-06-25
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Expires: 2009-11-22
Abstract
Abstract An enossal or endosteal implant with a fastening head and fastening arrannt having a metal implant post screwable into a basic structure for snugly fitting a conditionally removable denture with a spacer element provided with a centering collar being inserted into the open end of the basic structure and engageable with a shoulder of an upper edge of the basic structure and an intermediate element having a portion made of an elastic material is characterized by the spacer element being made of metal and having a closed end remote from the fastening head for the denture and being threaded into the basic structure; the intermediate element is insertable in a socket formed by a counterbore at the open end of the spacer element and is provided with a ring shoulder for engaging an upper edge of the spacer element, and the intermediate element has an inner bore whose diameter, in an area facing the fastening head for the denture and remote from the spacer sleeve, is larger than the external diameter of the implant post, which holds the denture with a bearing surface engaging the ring shoulder. In one embodiment, the intermediate element is formed by a core element of a rigid material surrounded by a sleeve element of an elastic, plastic material.
Inventors
- 👤 Walter Durr
- 👤 Axel Kirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:02
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0086
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
228 words
An enossal implant comprising a basic structure for snugly receiving in a bore in a jaw of a patient, said basic structure having a threaded bore surrounded by an annular shoulder at an upper end, a spacing element being composed of metal and having external threads for securing the spacing element in the threaded bore of the basic structure with a first annular shoulder of the spacing element engaging the annular shoulder of said basic element, said spacing element having an axial bore with a threaded portion and a counterbore adjacent the end opposite a closed end of the spacing element forming a second annular shoulder, an intermediate element being inserted in said counterbore and having a ring shoulder engaging said second annular shoulder of the spacing element, the intermediate element having an inner bore aligned with the axial bore of the spacing element, and an implant post having a threaded portion and extending through the intermediate element to be threaded into the threaded portion of the axial bore of the spacing element, said intermediate element having at least a portion of the bore of a diameter greater than an external diameter of said implant post, said ring shoulder of the intermediate element being of a plastic material having an annular surface engageable by a bearing face of a denture secured by said post on said base structure.
Claim 2
Dependent Claim
228 words
An enossal implant comprising a basic structure for snugly receiving in a bore in a jaw of a patient, said basic structure having a threaded bore surrounded by an annular shoulder at an upper end, a spacing element being composed of metal and having external threads for securing the spacing element in the threaded bore of the basic structure with a first annular shoulder of the spacing element engaging the annular shoulder of said basic element, said spacing element having an axial bore with a threaded portion and a counterbore adjacent the end opposite a closed end of the spacing element forming a second annular shoulder, an intermediate element being inserted in said counterbore and having a ring shoulder engaging said second annular shoulder of the spacing element, the intermediate element having an inner bore aligned with the axial bore of the spacing element, and an implant post having a threaded portion and extending through the intermediate element to be threaded into the threaded portion of the axial bore of the spacing element, said intermediate element having at least a portion of the bore of a diameter greater than an external diameter of said implant post, said ring shoulder of the intermediate element being of a plastic material having an annular surface engageable by a bearing face of a denture secured by said post on said base structure.
Claim 3
Dependent Claim
21 words
An implant according to claim 1, wherein the amount of threading-in of the implant post into the spacer element is adjustable.
Claim 4
Dependent Claim
23 words
An implant according to claim 1, wherein the implant post has a plastic envelope in the area coming in contact with said denture.
Claim 5
Dependent Claim
17 words
An implant post according to claim 1, wherein the denture is mounted elastically on the implant post.
Claim 6
Dependent Claim
22 words
An implant according to claim 4, wherein the elastic mounting of the denture on said post includes a plastic ring interposed therebetween.
Claim 7
Dependent Claim
27 words
An implant according to claim 1, wherein the denture is elastically mounted on the implant post by a plastic envelope at a head of said implant post.
Claim 8
Dependent Claim
32 words
An implant according to claim 1, wherein the counterbore of the spacer element receiving the intermediate element in a flush manner has a conical expansion to form a frusto conical cross section.
Claim 9
Dependent Claim
21 words
An implant according to claim 1, wherein the implant post can be threaded into the spacer element with an adjustable torque.
Claim 10
Dependent Claim
23 words
An implant according to claim 1, wherein all exposed surfaces of the basic structure and the spacer element are coated with a hydroxylapatite.
Claim 11
Dependent Claim
27 words
An implant according to claim 1, wherein the implant post can be coated with an adhesive at the lower end of the vicinity of its external threads.
Claim 12
Dependent Claim
68 words
An implant according to claim 1, wherein the intermediate element is completely made of an elastic material, said elastic material being a plastic, and the inner bore of the intermediate element has a portion of a diameter corresponding to the external diameter of the implant post being provided adjacent the spacer element so that the portion of the bore having the larger external diameter is adjacent the denture.
Claim 13
Dependent Claim
49 words
An implant according to claim 1, wherein the intermediate element is composed of a core element for surrounding the implant post made of a relatively rigid material, and a sleeve element made of a relatively soft elastic material surrounding the core element in the area of the ring shoulder.
Claim 14
Dependent Claim
19 words
An implant according to claim 12, wherein the core element is made from a rigid plastic selected from polyoxymethylene.
Claim 15
Dependent Claim
15 words
An implant according to claim 12, wherein the intermediate core is made of a metal.
Claim 16
Dependent Claim
14 words
An implant according to claim 14, wherein the core element is made from titanium.
Claim 17
Dependent Claim
17 words
An implant according to claim 12, wherein the sleeve element is made of a flexible plastic polyurethane.
Claim 18
Dependent Claim
29 words
An implant according to claim 12, wherein the core element has a sleeve-like construction and a collar is provided in the vicinity of the ring shoulder and bearing shoulder.
Claim 19
Dependent Claim
18 words
An implant according to claim 17, wherein the sleeve element is positively connected to the intermediate core element.
Claim 20
Dependent Claim
12 words
An implant according to claim 17, wherein the collar has an undercut.
Claim 21
Dependent Claim
20 words
An implant according to claim 17, wherein the sleeve element is shaped by injection molding process on the core element.
Claim 22
Dependent Claim
38 words
An implant according to claim 12, wherein the core element has an inner bore with a central region in the vicinity of the ring shoulder having an internal diameter corresponding to the external diameter of the implant post.
Claim 23
Dependent Claim
26 words
An implant according to claim 21, wherein the central region of the small internal diameter is equal distance from the end faces of the intermediate element.
Claim 24
Dependent Claim
27 words
An implant according to claim 21, wherein the central region of a smaller internal diameter has a varying spacing from the end faces of the intermediate element.
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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) | 1994-06-24 | 1994-12-24 | 1995-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-24 | 1998-12-24 | 1999-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-24 | 2002-12-24 | 2003-06-25 | $7700.00 | Window Closed / Lapsed |