Galt trephine

Galt trephine

a 0.75 inch cylinder with a saw-toothed cutting edge at one end and grinding ridges down the outside with a crossbar handle at the other end for excision of a plate of bone. The center of the cutting circle has a sharp-pointed pin which prevents the trephine from moving laterally while cutting and fixes the trephined bone disk so that it does not fall into a cavity.
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