US5174755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental implant
Assignee: Olympus Corp
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Filing: 1991-10-17
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Granted: 1992-12-29
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Expires: 2011-10-17
Abstract
Abstract A dental implant comprising an artificial root which is embedded in a jaw bone and a post to which an artificial tooth is attached, wherein a stress absorbing member made of a super elastic material is provided in at least a part of the implant between the artificial root and the post. Preferably, a stress absorbing system consisting of a super elastic material member and a polymeric material member is employed.
Inventors
- 👤 Hiroshi Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:06
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0086; A61C2201/00; A61C2201/007; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30092; A61F2002/30316; A61F2002/30535; A61F2002/30563; A61F2210/00; A61F2210/0014; A61F2210/0019
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
69 words
A dental implant comprising an artificial root adapted to be embedded in a jaw bone and a post to which an artificial tooth is attached, wherein said artificial root is formed of an elastic material having a high rigidity and wherein a stress absorbing member formed of a super elastic material is provided in at least a portion of a connection portion between said artificial root and said post.
Claim 2
Dependent Claim
69 words
A dental implant comprising an artificial root adapted to be embedded in a jaw bone and a post to which an artificial tooth is attached, wherein said artificial root is formed of an elastic material having a high rigidity and wherein a stress absorbing member formed of a super elastic material is provided in at least a portion of a connection portion between said artificial root and said post.
Claim 3
Dependent Claim
19 words
A dental implant according to claim 1, wherein the artificial root comprises an implant body and a gingiva-penetrating member.
Claim 4
Dependent Claim
35 words
A dental implant according to claim 1, wherein the stress absorbing member comprises a super elastic member and a polymeric member at least a part of which is in contact with the super elastic member.
Claim 5
Dependent Claim
17 words
A dental implant according to claim 3, wherein the polymeric material is formed into a trapezoid post.
Claim 6
Dependent Claim
76 words
A dental implant according to claim 2, wherein the stress absorbing member comprises a super elastic member and a polymeric member, and the stress absorbing member is provided in such a manner that at least a part of the super elastic member is in direct contact with both the implant body and the post, and that the polymeric member is in contact with at least a part of the side surface of the super elastic member.
Claim 7
Dependent Claim
28 words
A dental implant according to claim 1, wherein the super elastic material comprises a shape memory alloy having an inverse transformation temperature lower than the oral cavity temperature.
Claim 8
Dependent Claim
22 words
A dental implant according to claim 6, wherein the inverse transformation temperature of the shape memory alloy is 35° C. or lower.
Claim 9
Dependent Claim
23 words
A dental implant according to claim 7, wherein the inverse transformation temperature of the shape memory alloy is between 20° and 25° C.
Claim 10
Dependent Claim
15 words
A dental implant according to claim 6, wherein the shape memory alloy is Ni-Ti alloy.
Claim 11
Dependent Claim
33 words
A dental implant according to claim 9, wherein at least portions of the Ni-Ti shape memory alloy exposed to an oral cavity are covered with a biologically less-hazardous material than said Ni-Ti alloy.
Claim 12
Dependent Claim
29 words
A dental implant according to claim 9, wherein the biologically less-hazardous material is selected from the group consisting of a biological less-hazardous metal and a biological less-hazardous polymeric material.
Claim 13
Dependent Claim
17 words
A dental implant according to claim 11, wherein said biologically less-hazardous metal is a titanium thin film.
Claim 14
Dependent Claim
24 words
A dental implant according to claim 11, wherein said biologically less-hazardous polymeric material is selected from the group consisting of Teflon, polyethylene and nylon.
Claim 15
Dependent Claim
21 words
A dental implant according to claim 1, wherein said connection portion is provided separately from said artificial root and said post.
Claim 16
Dependent Claim
26 words
A dental implant according to claim 1, wherein said super elastic material is provided only in said connection portion between said artificial root and said post.
References Cited (Backward Citations)
JPS58116353A
Cited
US4468201A
Cited
JPS6238148A
Cited
US4713006A
Cited
JPS639451A
Cited
JPS63103616A
Cited
US5026280A
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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) | 1995-12-29 | 1996-06-29 | 1996-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-29 | 2000-06-29 | 2000-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-29 | 2004-06-29 | 2004-12-29 | $7700.00 | Window Closed / Lapsed |