Patent US2757538A successfully refreshed from Google Patents.
US4826434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental implant
Assignee: Denar Corp
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Filing: 1986-10-20
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Granted: 1989-05-02
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Expires: 2006-10-20
Abstract
Abstract A desirable dental implant can be constructed out of titanium so as to have a first end for insertion into a jawbone, an externally threaded shank extending from said first end, a tapered head on said shank adjacent to the second end of the implant and an internally threaded bore shaped so as to include a non-round socket in the threads of said bore. The exterior of the implant is preferably etched so as to increase its area.
Inventors
- 👤 Kenneth K. Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:48
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0022; A61C8/0048; A61C8/005; A61C8/006
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
209 words
In an elongated member serving as a dental implant, said member having a first end which is adapted to be located within the interior of the alveolar cavity and a second end which is adapted to be secured to prosthetic crown, said member having a biocompatible exterior, the improvement which comprises: said second end of said implant includes an internally threaded cavity formed therein and a non-round socket formed as a part of said cavity, said cavity being useful both in installing said implant and in securing a post for mounting a prosthetic crown on said implant, a screw thread for use in mounting said first end within the interior of the alveolar cavity, said screw thread extending around and leading away from the first end of said member, the turns of said thread eing spaced from one another so as to permit bond growth generally between adjacent turns of said thread, and said thread being shaped so as to have a flat surface facing away from said first end of said member for use in holding said member in place as it it is used and a tapered surface facing generally toward said first end of said member for use in distributing stress when said member is used.
Claim 2
Dependent Claim
209 words
In an elongated member serving as a dental implant, said member having a first end which is adapted to be located within the interior of the alveolar cavity and a second end which is adapted to be secured to prosthetic crown, said member having a biocompatible exterior, the improvement which comprises: said second end of said implant includes an internally threaded cavity formed therein and a non-round socket formed as a part of said cavity, said cavity being useful both in installing said implant and in securing a post for mounting a prosthetic crown on said implant, a screw thread for use in mounting said first end within the interior of the alveolar cavity, said screw thread extending around and leading away from the first end of said member, the turns of said thread eing spaced from one another so as to permit bond growth generally between adjacent turns of said thread, and said thread being shaped so as to have a flat surface facing away from said first end of said member for use in holding said member in place as it it is used and a tapered surface facing generally toward said first end of said member for use in distributing stress when said member is used.
Claim 3
Dependent Claim
56 words
An implant as claimed in claim 1 wherein: said implant includes a tapered head adjacent to said second end, said head being shaped so as to fit against a hole in the cortical plate so as to minimize the entrance of soft tissue into the medullary region of a jaw bone when said insert is used.
Claim 4
Dependent Claim
52 words
An implant as claimed in claim 1 wherein: said exterior surface of said implant is an etched surface having an actual surface area which is greater than its apparent surface area as a result of the presence of surface irregularities said etched surface being receptive to growth when said implant is used.
Claim 5
Dependent Claim
29 words
An implant as claimed in claim 1 wherein: the turns of said thread are spaced apart a distance corresponding to at least 50% of the distance across said thread.
Claim 6
Dependent Claim
47 words
An implant as claimed in claim 1 wherein: said first end is shaped so as a rounded point and so as to include cutting notch means for cutting into bond as said implant is installed and for holding said implant against rotation after bone growth has occurred.
Claim 7
Dependent Claim
100 words
An implant as claimed in claim 1 wherein: said implant includes a tapered head adjacent to said second end, said head being shaped so as to fit against a hole in the cortical plate so as to minimize the entrance of soft tissue into the medullary region of a jaw bone when said insert is used, said exterior surface of said implant is an etched surface having an actual surface area which is greater than it apparent surface area as a result of the presence of surface irregularities, said etched surface being receptive to growth when said implant is used.
Claim 8
Dependent Claim
29 words
An implant as claimed in claim 6 wherein: the turns of said thread are spaced apart a distance corresponding to at least 50% of the distance across said thread.
Claim 9
Dependent Claim
47 words
An implant as claimed in claim 6 wherein: said first end is shaped so as a rounded point and so as to include cutting notch means for cutting into bond as said implant is installed and for holding said implant against rotation after bone growth has occurred.
Claim 10
Dependent Claim
47 words
An implant as claimed in claim 7 wherein: said first end is shaped so as a rounded point and so as to include cutting notch means for cutting into bond as said implant is installed and for holding said implant against rotation after bone growth has occurred.
Claim 11
Dependent Claim
77 words
An implant as claimed in claim 1 wherein: said implant includes a tapered head adjacent to said second end, said head being shaped so as to fit against a hole in the cortical plate so as to minimize the entrance of soft tissue into the medullary region of a jaw bone when said insert is used, the turns of said thread are spaced apart a distance corresponding to at least 50% of the distance across said thread.
Claim 12
Dependent Claim
47 words
An implant as claimed in claim 10 wherein: said first end is shaped so as a rounded point and so as to include cutting notch means for cutting into bond as said implant is installed and for holding said implant against rotation after bone growth has occurred.
Claim 13
Dependent Claim
73 words
An implant as claimed in claim 1 wherein: said exterior surface of said implant is an etched surface having an actual surface area which is greater than it apparent surface area as a result of the presence of surface irregularities, said etched surface being receptive to growth when said implant is used, the turns of said thread are spaced apart a distance corresponding to at least 50% of the distance across said thread.
Claim 14
Dependent Claim
47 words
An implant as claimed in claim 12 wherein: said first end is shaped so as a rounded point and so as to include cutting notch means for cutting into bond as said implant is installed and for holding said implant against rotation after bone growth has occurred.
Claim 15
Dependent Claim
69 words
An implant as claimed in claim 1 wherein: the turns of said thread are spaced apart a distance corresponding to at least 50% of the distance across said thread, and said first end is shaped so as a rounded point and so as to include cutting notch means for cutting into bond as said implant is installed and for holding said implant against rotation after bone growth has occurred.
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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) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |