Patent US2628149A successfully refreshed from Google Patents.
US4239489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental threaded tapered post with vent
Assignee: Ellman International Inc
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Filing: 1979-02-05
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Granted: 1980-12-16
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Expires: 1999-02-05
Abstract
Abstract A dental post for build up of a tooth crown is characterized by an outer threaded structure having an upper cylindrical part and a lower tapered part and provided with a longitudinally extending vent. The post can be screwed or cemented into a reamed tooth root canal. The upper threaded part can accommodate a screw-on head.
Inventors
- 👤 Alan G. Ellman
- 👤 Jon C. Garito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:45
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/225; A61C13/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
104 words
A dental post for mounting in a tooth root canal, comprising an elongated metal member having on its exterior along substantially its entire length a fine helical thread, said metal member being constituted of a tapered lower part extending along substantially one-half to three-quarters of its full length and coaxial therewith a cylindrical upper part, said metal member having a vent extending along its full length, a head element having an internal threaded hole in threaded engagement with the upper part of said metal member, and means on the head element for receiving screw driving means for screwing the post into the root canal.
Claim 2
Dependent Claim
104 words
A dental post for mounting in a tooth root canal, comprising an elongated metal member having on its exterior along substantially its entire length a fine helical thread, said metal member being constituted of a tapered lower part extending along substantially one-half to three-quarters of its full length and coaxial therewith a cylindrical upper part, said metal member having a vent extending along its full length, a head element having an internal threaded hole in threaded engagement with the upper part of said metal member, and means on the head element for receiving screw driving means for screwing the post into the root canal.
Claim 3
Dependent Claim
103 words
A dental post for mounting in a tooth root canal, comprising an elongated metal member having on its exterior along substantially its entire length a fine helical thread, said metal member being constituted of a tapered lower part extending along substantially one-half to three-quarters of its full length and coaxial therewith a cylindrical upper part, said metal member having a vent extending along its full length, and a head element having an internal threaded hole in threaded engagement with the upper part of said metal member, in combination with plural head elements each having the same threaded hole but a different outer configuration.
Claim 4
Dependent Claim
103 words
A dental post for mounting in a tooth root canal, comprising an elongated metal member having on its exterior along substantially its entire length a fine helical thread, said metal member being constituted of a tapered lower part extending along substantially one-half to three-quarters of its full length and coaxial therewith a cylindrical upper part, said metal member having a vent extending along its full length, and a head element having an internal threaded hole in threaded engagement with the upper part of said metal member, in combination with plural head elements each having the same threaded hole but a different outer configuration.
Claim 5
Dependent Claim
23 words
A dental post as claimed in claim 2 wherein the vent comprises a hole extending through the center of the elongated metal member.
Claim 6
Dependent Claim
23 words
A dental post as claimed in claim 2 wherein the vent comprises a groove extending along the threaded side of the metal member.
Claim 7
Dependent Claim
17 words
A dental post as claimed in claim 1 wherein the screw driving means comprises a transverse slot.
Claim 8
Independent Claim
84 words
The method of mounting a dental post having a helically threaded exterior extending over a lower tapered part and an upper cylindrical part in a tooth root canal, comprising the steps of securing the post in the root canal to a depth not substantially exceeding the length of the lower tapered part, trimming off excess portions of the upper cylindrical part, screwing a head onto the remaining cylindrical part, permanently securing the head to the post, and building a tooth restoration over the head.
Claim 9
Independent Claim
84 words
The method of mounting a dental post having a helically threaded exterior extending over a lower tapered part and an upper cylindrical part in a tooth root canal, comprising the steps of securing the post in the root canal to a depth not substantially exceeding the length of the lower tapered part, trimming off excess portions of the upper cylindrical part, screwing a head onto the remaining cylindrical part, permanently securing the head to the post, and building a tooth restoration over the head.
Claim 10
Independent Claim
108 words
The method of mounting a vented dental post having a helically threaded exterior over a lower tapered part and an upper cylindrical part in a tooth root canal, comprising the steps of fitting the post to the root canal to a depth not substantially exceeding the length of the lower tapered part, screwing a head having screw driving means onto the upper cylindrical part, applying cement to the root canal or the post and screwing the latter into the root canal, excess cement being carried up the vent to the head and securing the latter to the post upon hardening, and building a tooth restoration over the head.
Claim 11
Independent Claim
108 words
The method of mounting a vented dental post having a helically threaded exterior over a lower tapered part and an upper cylindrical part in a tooth root canal, comprising the steps of fitting the post to the root canal to a depth not substantially exceeding the length of the lower tapered part, screwing a head having screw driving means onto the upper cylindrical part, applying cement to the root canal or the post and screwing the latter into the root canal, excess cement being carried up the vent to the head and securing the latter to the post upon hardening, and building a tooth restoration over the head.
Claim 12
Dependent Claim
93 words
A dental post for mounting in a tooth root canal, comprising an elongated metal member having on its exterior along substantially its entire length a fine helical thread, said metal member being constituted of a tapered lower part extending along substantially one-half to three-quarters of its full length and coaxial therewith a cylindrical upper part, said metal member having a vent extending along its full length, and a head element having an internal threaded hole in threaded engagement with the upper part of said metal member, said head element comprising laterally projecting flutes.
Claim 13
Dependent Claim
93 words
A dental post for mounting in a tooth root canal, comprising an elongated metal member having on its exterior along substantially its entire length a fine helical thread, said metal member being constituted of a tapered lower part extending along substantially one-half to three-quarters of its full length and coaxial therewith a cylindrical upper part, said metal member having a vent extending along its full length, and a head element having an internal threaded hole in threaded engagement with the upper part of said metal member, said head element comprising laterally projecting flutes.
Claim 14
Dependent Claim
22 words
A dental post as claimed in claim 8 wherein the post is constituted of a non-corrosive metal and has a slotted top.
Claim 15
Independent Claim
123 words
The method of mounting a vented dental post having a helically threaded exterior over a lower tapered part and an upper cylindrical part in a tooth root canal, comprising the steps of fitting the post to the root canal to a depth not substantially exceeding the length of the lower tapered part, applying cement to the root canal or the post and screwing the latter into the root canal to the desired depth leaving the post cylindrical part projecting above the tooth, excees cement, air and moisture being carried up the vent to the exterior, trimming off undesired excess portions of the upper cylindrical part still leaving a portion projecting above the tooth, and building a tooth restoration over the projecting post portion.
Claim 16
Independent Claim
123 words
The method of mounting a vented dental post having a helically threaded exterior over a lower tapered part and an upper cylindrical part in a tooth root canal, comprising the steps of fitting the post to the root canal to a depth not substantially exceeding the length of the lower tapered part, applying cement to the root canal or the post and screwing the latter into the root canal to the desired depth leaving the post cylindrical part projecting above the tooth, excees cement, air and moisture being carried up the vent to the exterior, trimming off undesired excess portions of the upper cylindrical part still leaving a portion projecting above the tooth, and building a tooth restoration over the projecting post portion.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |