Zimmer Spine, Inc.

Gene Newcomb

Jason Piehl

Kevin V Guenther

Craig Hahne

A self-drilling bone screw includes a screw body centered on a longitudinal axis and having an external thread winding. The bone screw has a head portion at one end of the screw body and a drill point at the other end. The drill point has two blades, each having a cutting lip and a primary relief surface trailing from the cutting lip. The two blades defining a flute between them. The flute has an opening to the side of the screw body, which opening spans an obtuse angle, such as about 120&#xb0;, about the longitudinal axis. The primary relief surfaces have a lip relief angle of about 30&#xb0;. The drill point has a point angle of about 100&#xb0;.

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Plymouth, MN, United States of America

Gene Newcomb