08388659 is referenced by 48 patents and cites 175 patents.

A screw for use in spinal surgery provided with a screw shaft and a screw head and at least one extension tab extending proximally from the screw head, the extension tab being defined relative to the screw head by a stress concentration feature. At a proximal end of the extension tab, the extension tab may be narrower in a circumferential direction than the extension tab at a distal portion thereof. A particular shape of stress concentration may be provided.

Title
Spondylolisthesis screw and instrument for implantation
Application Number
12/589160
Publication Number
8388659 (B1)
Application Date
October 19, 2009
Publication Date
March 5, 2013
Inventor
Mukund Gundanna
College Station
TX, US
Eric A Lab
Wadsworth
OH, US
Agent
Chad D Bruggeman
Robert H Eichenberger
Middleton Reutlinger
Assignee
Theken Spine
OH, US
IPC
A61B 17/70
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