US4525147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Root canal implant, proximity indicative, and method of implantation
Assignee: Individual
•
Filing: 1983-05-31
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Granted: 1985-06-25
•
Expires: 2003-05-31
Abstract
Abstract A root canal implant is proximity indicative by reason of its electrical conductivity and comprises carbon fibers. Method of implantation is by means of endogenous heating within the prepared dental cavity, of the implant, and is the preferred method.
Inventors
- 👤 Richard J. Pitz
- 👤 Ezekiel J. Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:03
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/50; A61B; A61B17/00; A61B2017/00017; A61B2017/00022; A61B2017/00026; A61C19/00; A61C19/04; A61C19/042; A61C5/55
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
45 words
A dental root canal implant comprising a unitary structure of thermoplastic resin and electrically conductive carbon fibers, whereby said implant is capable of conducting electricity for measuring the proximity of the implant to the apex of a root canal and for heating the thermoplastic resin.
Claim 2
Dependent Claim
45 words
A dental root canal implant comprising a unitary structure of thermoplastic resin and electrically conductive carbon fibers, whereby said implant is capable of conducting electricity for measuring the proximity of the implant to the apex of a root canal and for heating the thermoplastic resin.
Claim 3
Dependent Claim
68 words
A dental process for root canal therapy comprising: a. preparing the canal of a tooth, b. inserting a root canal implant comprising a thermoplastic resin and electrically conductive carbon fibers, c. heating to a thermoplastic adhesiveness said resin by heat generated in the fibers by application of energy thereto, d. condensing the implant intimately to the inside of the canal, and e. cooling said implant to room temperature.
Claim 4
Dependent Claim
68 words
A dental process for root canal therapy comprising: a. preparing the canal of a tooth, b. inserting a root canal implant comprising a thermoplastic resin and electrically conductive carbon fibers, c. heating to a thermoplastic adhesiveness said resin by heat generated in the fibers by application of energy thereto, d. condensing the implant intimately to the inside of the canal, and e. cooling said implant to room temperature.
Claim 5
Dependent Claim
13 words
The process of claim 2 wherein the heat is generated by electrical energy.
Claim 6
Dependent Claim
13 words
The process of claim 2, wherein the heat is generated by ultrasonic energy.
Claim 7
Dependent Claim
72 words
A process for measuring and filling a root canal comprising, inserting a thermoplastic rod having means to conduct electricity into a root canal, measuring the proximity of said rod to the apex of the canal, by an electrical measurement using said rod, converting said rod into a softened thermoadhesive mass by heating, intimately condensing the softened mass into the canal, and allowing said mass to cool and remain as a permanent implant.
Claim 8
Dependent Claim
72 words
A process for measuring and filling a root canal comprising, inserting a thermoplastic rod having means to conduct electricity into a root canal, measuring the proximity of said rod to the apex of the canal, by an electrical measurement using said rod, converting said rod into a softened thermoadhesive mass by heating, intimately condensing the softened mass into the canal, and allowing said mass to cool and remain as a permanent implant.
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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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |