Instruments for bone screws

Details Instruments for bone screws Instruments for bone screws

2005-02-14

2009-02-17

Robert, Eduardo C (Department: 3733)

Surgery

Instruments

Orthopedic instrumentation

Reexamination Certificate

active

07491203

ABSTRACT:
An adjustable drill for use in implanting orthopedic screws, such as adjustable compression screws having a separate adjustable head. The adjustable drill comprises a primary drill bit and a countersink drill bit encircling the primary drill bit. The countersink drill bit is configured to selectively slide along the primary drill bit for use in selecting a drill depth. The countersink drill bit is associated with a stop member that is configured to selectively lock the countersink drill bit at one of a plurality of selected positions along the primary drill bit to thereby establish a drill depth. The drill depth corresponds to the size of a selected screw implant, allowing the drill to be used as a trial. The adjustable drill forms a bore having a primary bore and a countersunk entry.

REFERENCES:
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patent: 5482410 (1996-01-01), Chambers
patent: 5895389 (1999-04-01), Schenk et al.
patent: 6089798 (2000-07-01), Wierspecker et al.
patent: 6505692 (2003-01-01), Kaibach et al.
patent: 2002/0159850 (2002-10-01), Ravid

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