Dental twist-lock pin and drill

Dentistry – Method or material for testing – treating – restoring – or... – Anchor pin

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A61C 504

Patent

active

042907560

ABSTRACT:
A twist-lock pin for improving the retention and resistance characteristics of plastic dental restorative materials and a drill for drilling a tapered hole into sound tooth structure whereupon the geometrically similar but oversized left-hand threaded pin is inserted. Slight rotation of the pin in a counter-clockwise manner causes the threads to bite simultaneously, effectively locking it into place. Plastic restorative materials including dental amalgam, composites, silicates, resins and gold foil may be inserted against the threaded protruding portion of the pin to enhance the retention and resistance characteristics.

REFERENCES:
patent: 275491 (1883-04-01), How
patent: 616302 (1898-12-01), Evans
patent: 2075024 (1937-03-01), Delano
patent: 3672058 (1972-06-01), Nikoghossian
patent: 4060896 (1977-12-01), Wahnish
patent: 4103422 (1978-08-01), Weiss

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