US3908270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endodontic apical sealer method and apparatus
Assignee: Individual
•
Filing: 1973-06-29
•
Granted: 1975-09-30
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Expires: 1993-06-29
Abstract
Abstract A method and apparatus for sealing the apex of an endodontically treated tooth wherein the apex of the canal is sealed with a tapered screw or plug element which engages the wall of the canal to allow for subsequent syringe filling of the canal without overfilling beyond the tooth structure.
Inventors
- 👤 Mark J Fishman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:11
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/50
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A method for endodontically treating a tooth comprising the steps of debridement of the nerve canal of said tooth, cleaning and shaping the nerve canal with instruments of gradually increasing size, placing a sealing element of the same general size and shape as the apex of said canal within said canal at the apex thereof, and syringe filling at least a portion of said canal adjacent said sealing element which does not allow material to be syringed beyond the apex of said canal.
Claim 2
Independent Claim
83 words
A method for endodontically treating a tooth comprising the steps of debridement of the nerve canal of said tooth, cleaning and shaping the nerve canal with instruments of gradually increasing size, placing a sealing element of the same general size and shape as the apex of said canal within said canal at the apex thereof, and syringe filling at least a portion of said canal adjacent said sealing element which does not allow material to be syringed beyond the apex of said canal.
Claim 3
Dependent Claim
28 words
A method as defined in claim 1 wherein said step of placing a sealing element involves a threaded engagement of said element with the wall of said canal.
Claim 4
Dependent Claim
112 words
An apical sealing element for sealing the apex of a tooth root canal which has been instrumented to a predetermined size and shape at said apex comprising a non-resilient frusto-conical solid of revolution of a size and shape corresponding to the dimensions of the apical end of said root canal to mate therewith, a domed portion at the smaller end of said frusto-conical solid of revolution, means on the outer periphery of said frusto-conical solid of revolution and projecting therefrom for sealing said solid of revolution to the apical end of a root canal, and means at the larger end of said solid of revolution for utilization in placement of said element.
Claim 5
Dependent Claim
112 words
An apical sealing element for sealing the apex of a tooth root canal which has been instrumented to a predetermined size and shape at said apex comprising a non-resilient frusto-conical solid of revolution of a size and shape corresponding to the dimensions of the apical end of said root canal to mate therewith, a domed portion at the smaller end of said frusto-conical solid of revolution, means on the outer periphery of said frusto-conical solid of revolution and projecting therefrom for sealing said solid of revolution to the apical end of a root canal, and means at the larger end of said solid of revolution for utilization in placement of said element.
Claim 6
Dependent Claim
33 words
A device as defined in claim 3 wherein said means for sealing comprises a thread around the tapered wall of said solid of revolution for engagement with the wall of said root canal.
Claim 7
Dependent Claim
29 words
A device as defined in claim 3 wherein said means for sealing comprises a gutta percha o-ring in a groove around the tapered wall of said solid of revolution.
Claim 8
Dependent Claim
22 words
A device as defined in claim 3 wherein said last-mentioned means comprises a threaded hole adapted for engagement with a mating shaft.
Claim 9
Dependent Claim
40 words
A device as defined in claim 3 wherein said last-mentioned means comprises a shaft emanating from said larger end, and a notch proximate to said larger end for breaking said shaft from said element upon application of a predetermined force.
Claim 10
Dependent Claim
25 words
A device as defined in claim 3 wherein said element has a material inert with respect to apical fluids and tissue at said domed portion.
Claim 11
Dependent Claim
18 words
A device as defined in claim 8 wherein the outer surface of said domed portion is of ticonium.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |