US 6,981,976 B1
Method and apparatus for inserting and countersinking a modular screw
Ryan John Schoenefeld, Fort Wayne, Ind. (US)
Assigned to Biomet, Inc., Warsaw, Ind. (US)
Filed on May 13, 2002, as Appl. No. 10/144,186.
Int. Cl. A61B 17/58 (2006.01); A61F 2/00 (2006.01)
U.S. Cl. 606—104 28 Claims
OG exemplary drawing
 
1. An instrument for inserting and removing a modular screw shank, said instrument comprising:
a holding member operable to hold the modular screw shank;
an engagement member movable between an engaged position and a non-engaged position; and
an engagement system adapted to direct said engagement member between said engaged position and said non-engaged position;
wherein when said engagement member is in said engaged position the modular screw shank is locked relative said holding member;
wherein said holding member comprises a cannulated member having a first end and a second end;
wherein said engagement system is positioned in said first end of said cannulated member;
wherein said engagement system holds the shank; and
wherein said engagement system further holds said engagement member and directs and said engagement member in contact with the shank.