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EP0059068A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Dental pin for anchoring cast restorations

Assignee: Individual
•
Filing: 1982-02-17
•
Granted: —
•
Expires: 2002-02-17
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Abstract

Abstract The pin comprises a threaded portion (11) for self-tapping insertion in a bore formed in tooth dentine, a frusto-conical shoulder portion (16), a shank (12) with at one end a flat (14) and annular groove (15) so that the pin can be latched in a standard contra-angle handpiece, and an undercut (19) permitting the shank (12) to automatically separate from the remainder of the pin. The pin is handpiece-inserted into said bore in the tooth dentine and when the shoulder (16) engages a correspondingly shaped portion of the cast restoration, the undercut (19) automatically shears-off. The pin can be finally hand-tightened by engaging a hand-wrench on the shaped portion (18).

Inventors

  • 👤 Alan Julian Segal

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-03 22:58
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/30; A61C5/35

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 92 words
A dental pin for anchoring cast restorations comprising a threaded portion (11) for self-tapping insertion in a bore formed in tooth dentine, a shoulder portion (16) for abutting against a portion of the cast restoration, and a oonnecting portion (13) for transmitting torque, characterised in that the connecting portion (13) includes a shank (12) capable of locking in a dental handpieoe, a weakened portion (19) being provided intermediate the connecting portion (13) and the shoulder portion (16)for permitting shearing and separation of the connecting portion from the remainder of the dental pin.
Claim 2
Dependent Claim 92 words
A dental pin for anchoring cast restorations comprising a threaded portion (11) for self-tapping insertion in a bore formed in tooth dentine, a shoulder portion (16) for abutting against a portion of the cast restoration, and a oonnecting portion (13) for transmitting torque, characterised in that the connecting portion (13) includes a shank (12) capable of locking in a dental handpieoe, a weakened portion (19) being provided intermediate the connecting portion (13) and the shoulder portion (16)for permitting shearing and separation of the connecting portion from the remainder of the dental pin.
Claim 3
Dependent Claim 38 words
A dental pin according to Claim 1, characterised in that one end of the shank (12) is formed with a flat (14) and a part-annular groove (15) whereby the shank can be latched in a latching-type dental handpiece.
Claim 4
Dependent Claim 43 words
A dental pin according to Claim 1 or 2, characterised in that a portion of the pin intermediate the shoulder portion (16) and the weakened portion (19) is shaped (18) to provide purchase for a hand-wrench to permit final hand-tightening of the pin.
Claim 5
Dependent Claim 19 words
A dental pin according to any preceding Claim, characterised in that the shoulder portion (16) is of frusto-conical form.
Claim 6
Dependent Claim 24 words
A dental pin according to any of Claims 1 to 4, characterised in that the pin is constituted by a single piece of material.
Claim 7
Dependent Claim 42 words
A dental pin according to any of Claims 1 to 4, characterised in that the pin is made in two parts which are permanently united so as to avoid the danger of a part of the pin dropping into the patient's mouth.

References Cited (Backward Citations)

US3395455A Cited
GB1347226A Cited
FR2293184A1 Cited
FR2347027A1 Cited

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