US4773858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tooth implant
Assignee: Individual
•
Filing: 1987-10-20
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Granted: 1988-09-27
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Expires: 2007-10-20
Abstract
Abstract Means and method are provided for implanting an artificial tooth in the alveolus in the jaw bone which is left when the tooth is extracted. The method comprises wrapping a thin, sheet metal base with barbed projections around the depending root portion of an artificial tooth, and pressing the root portion with the sheet metal wrapped therearound down into the alveolus, to act as an interface between the alveolus and the material of the root of the artificial tooth to securely hold the artificial tooth into the alveolus while bone material grows up around the sheet metal base and the root portion of the artificial tooth.
Inventors
- 👤 Fidencio G. Marquez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:41
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0037; A61C8/0039
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
A tooth implant sheath for anchoring an artificial tooth having a root portion dimensioned to insert into the jawbone alveolus which results from tooth extraction, said implant sheath comprising: (a) a generally cylindrical sheath composed of a chemically inactive sheet metal dimensioned to snugly encircle and sheath said root portion and being dimensioned to fit down into a jawbone alveolus; (b) said sheath having means to engage the jawbone around said alveolus; and (c) said sheath also having means to engage the material forming the root of said artificial tooth.
Claim 2
Dependent Claim
90 words
A tooth implant sheath for anchoring an artificial tooth having a root portion dimensioned to insert into the jawbone alveolus which results from tooth extraction, said implant sheath comprising: (a) a generally cylindrical sheath composed of a chemically inactive sheet metal dimensioned to snugly encircle and sheath said root portion and being dimensioned to fit down into a jawbone alveolus; (b) said sheath having means to engage the jawbone around said alveolus; and (c) said sheath also having means to engage the material forming the root of said artificial tooth.
Claim 3
Dependent Claim
26 words
Structure according to claim 1 wherein said sheet metal sheath defines a continuous slit along one side to provide said sheath with dimensional adjustability and resilience.
Claim 4
Dependent Claim
52 words
Structure according the claim 1 wherein said means to engage the jawbone and means to engage the material forming the root of said artificial tooth both comprise a series of prongs struck from said generally cylindrical sheath to leave an opening at each prong for the engagement thereof by ingrowing bone tissue.
Claim 5
Dependent Claim
64 words
Structure according the claim 3 wherein said generally cylindrical sheath has an upper portion and a lower portion and the prongs of the upper portion of said sheath are generally inwardly downwardly directed and the prongs in the lower portion are generally outwardly and upwardly directed to engage the sides of an alveolus and resist removal of said sheath once inserted into said alveolus.
Claim 6
Dependent Claim
16 words
Structure according the claim 1 wherein said sheath is slightly tapered to resemble a truncated cone.
Claim 7
Dependent Claim
15 words
Structure according the claim 1 wherein said sheath comprises a helical band of a cylinder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |