Trephine dental drill

Details Trephine dental drill Trephine dental drill

1986-12-29

1989-04-11

Wilson, John J.

Dentistry

Apparatus

Tool bit

433173, 408703, A61C 302

Patent

active

048201561

ABSTRACT:
A dental trephine drill cuts a bore having a central core. The drill includes a shank having a fluid passage for conducting drilling fluid and a cutting head disposed at a front end of the shank. The cutting head includes front and side faces. The end face surrounds a central hole and includes a plurality of end cutting edges extending from the hole to an outer periphery of the end face. The side face includes a plurality of longitudinal grooves, a longitudinal edge of which defines a side cutting edge. An aperture in each groove communicates the grooves with the interior of the head for conducting drilling fluid into the grooves to cool the drill head and bone tissue.

REFERENCES:
patent: 2188631 (1940-01-01), Kraus
patent: 2525669 (1950-10-01), Hainault
patent: 2947206 (1960-08-01), Flanagan
patent: 4021920 (1977-05-01), Kirschner et al.
patent: 4359318 (1982-11-01), Gittleman
patent: 4431416 (1984-02-01), Niznick
patent: 4511334 (1985-04-01), Grafelmann

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