US5087201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-threading pin for the implantation of dental prosthesis
Assignee: Individual
•
Filing: 1990-08-22
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Granted: 1992-02-11
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Expires: 2010-08-22
Abstract
Abstract A self-threading pin (1) for the implantation of a dental prosthesis is formed at one end with a drill bit (2). The screw threaded portion (3) of the pin (1 ) is provided with longitudinal flutes (5) for discharging the drilled material, departing from the rear end of the discharge grooves (4) of the drill bit (2) and extending along the whole length of the screw threaded portion (3) of the pin (1). The head (6) of the pin has a polygonal cross sectional shape for driving the pin by a tool.
Inventors
- 👤 Luigi P. Mondani
- 👤 Maria P. Mondani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:26
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0022; A61C8/0024
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
A self-threading pin to be screw-threaded into the maxilla bone for the implantation of a dental prosthesis comprising an intermediate screw-threaded shank portion, a driving head at one end of the shank portion and a drill bit at the other end of said shank portion, said screw-threaded shank portion of the pin being provided with two intercalated screw threads of different heights.
Claim 2
Dependent Claim
62 words
A self-threading pin to be screw-threaded into the maxilla bone for the implantation of a dental prosthesis comprising an intermediate screw-threaded shank portion, a driving head at one end of the shank portion and a drill bit at the other end of said shank portion, said screw-threaded shank portion of the pin being provided with two intercalated screw threads of different heights.
Claim 3
Dependent Claim
19 words
A self-threading pin according to claim 1, in which the said screw-threaded shank portion has a substantially cylindrical profile.
Claim 4
Dependent Claim
18 words
A self-threading pin according to claim 1, in which the said drill bit is a helical drill bit.
Claim 5
Dependent Claim
27 words
A self-threading pin according to claim 1, further provided with at least one discharge flute, extending from the said drill bit along the said screw-threaded shank portion.
Claim 6
Dependent Claim
18 words
A self-threading pin according to claim 1, in which the said driving head is a polygonal driving head.
Claim 7
Dependent Claim
162 words
A self-threading anchoring pin structure to be permanently anchored into maxilla bone tissue for the implantation of a dental prosthesis, comprising: a helical drill bit at the lower end of said pin, said drill bit constructed to drill out a previously formed bore hole in the bone, a driving head at the upper end of the pin, said driving head having means engagable for driving the drill bit into the bone tissue surrounding the previously formed bore hole, an intermediate screw-threaded shank portion including at least one helical thread and cylindrical land areas between the threads, the helical drill bit having an effective cutting diameter substantially equal to the diameter of said cylindrical land areas, so as to substantially match the cylindrical land areas with the inside surface of the bore hole drilled out by said drill bit, and at least one discharge flute extending from said drill bit along the screw-threaded shank portion for discharging material drilled by the drill bit.
Claim 8
Dependent Claim
162 words
A self-threading anchoring pin structure to be permanently anchored into maxilla bone tissue for the implantation of a dental prosthesis, comprising: a helical drill bit at the lower end of said pin, said drill bit constructed to drill out a previously formed bore hole in the bone, a driving head at the upper end of the pin, said driving head having means engagable for driving the drill bit into the bone tissue surrounding the previously formed bore hole, an intermediate screw-threaded shank portion including at least one helical thread and cylindrical land areas between the threads, the helical drill bit having an effective cutting diameter substantially equal to the diameter of said cylindrical land areas, so as to substantially match the cylindrical land areas with the inside surface of the bore hole drilled out by said drill bit, and at least one discharge flute extending from said drill bit along the screw-threaded shank portion for discharging material drilled by the drill bit.
Claim 9
Dependent Claim
26 words
A self-threading anchoring pin according to claim 6, wherein said screw-threaded shank portion of the pin is provided with two intercalated screw threads of different heights.
Claim 10
Dependent Claim
18 words
A self-threading anchoring pin according to claim 6, wherein the said driving head is a polygonal driving head.
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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) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |