Method of drilling through a bone structure

Details Method of drilling through a bone structure Method of drilling through a bone structure

1989-01-23

1990-08-28

Thaler, Michael H.

Surgery

Miscellaneous

Methods

606 80, 606173, A61B 1732

Patent

active

049516906

ABSTRACT:
A new drill-type cranial perforator is disclosed of the type which comprises a front drill head assembly made up of a leading inner drill and a trailing outer drill, and a rear support and drive assembly adapted to enable both drills so long as the leading inner drill is encountering a resistive surface and to disable both drills when the leading inner drill stops encountering the resistive surface.
The leading inner drill has at least one drilling flute with a forward cutting edge including a reentrant cutting segment axially rearward from the outer end of the forward cutting edge and extending inwardly towards the longitudinal axis of the perforator.

REFERENCES:
patent: 1123730 (1915-01-01), Greenfield
patent: 4319577 (1982-03-01), Bofinger et al.
patent: 4362161 (1982-12-01), Reimels et al.

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