Dental twist lock pin and wrench

Details Dental twist lock pin and wrench Dental twist lock pin and wrench

1979-06-22

1980-11-18

Mancene, Louis G.

Dentistry

Method or material for testing, treating, restoring, or...

Anchor pin

433174, 433127, 279 1S, A61C 504

Patent

active

042343097

ABSTRACT:
A twist-lock pin for improving the retention and resistance characteristics of plastic dental restorative materials and a wrench for providing positive control over the pin during insertion into the opening in the tooth. The pin is partially screwed counter-clockwise into a left-hand threaded metal cylinder, the wrench body. After two revolutions, the pin bottoms out against a flat ended, right-hand limiting screw which is inserted clockwise from the opposite end of the wrench body and which is limited by two lands, one a flat area in the wall of the wrench body and the other at the end of the wrench body. After the wrench has been utilized to insert the pin into the tooth structure, it is removed by relieving the pressure on the pin and unscrewing the wrench from the pin.

REFERENCES:
patent: 517248 (1894-03-01), Stanbrough
patent: 2351232 (1944-06-01), Schnabolk
patent: 3395455 (1968-08-01), Overby et al.
patent: 3813779 (1974-06-01), Tosti
patent: 4103422 (1978-08-01), Weiss et al.
"Leakage around various types of retention pins", J. of Prosthetic Dent., Feb., 1975, p. 192, Chan et al.

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