06258091 is referenced by 189 patents and cites 94 patents.

A bone member fastener for closing a craniotomy includes a cap and a base interconnected by a narrow cylindrical collar. The cap has an externally threaded stud that screws into an internally threaded bore of the collar, thereby allowing the cap and base to be brought into clamping engagement against the internal and external faces of a bone plate and surrounding bone. In a particularly disclosed embodiment, the base of the fastener is placed below a craniotomy hole with the collar projecting into the hole, and the stud of the cap is screwed into the bore of the base from above the hole to clamp a bone flap against the surrounding cranium. This device provides a method of quickly and securely replacing a bone cover into a craniotomy. The distance between the cap and base can be selected by how far the threaded stud of the cap is advanced into the internally threaded collar. The fastener is therefore adaptable for use in several regions of the skull having various thicknesses. An insertion tool with a long handle permits safe and convenient placement of the base between the brain and the internal face of the bone plate. Some disclosed embodiments of the fastener have a cap and base that conform to the curved surface of the skull, for example by having an arcuate shape or flexible members that conform to the curvature of the bone plate and surrounding cranial bone as the fastener is tightened.

Title
Bone fastener and instrument for insertion thereof
Application Number
8/866201
Publication Number
6258091 (B1)
Application Date
May 30, 1997
Publication Date
July 10, 2001
Inventor
Alan Shearin
Portland
OR, US
Christophe J P Sevrain
Ridgefield
WA, US
Lionel C Sevrain
Lake Oswego
OR, US
Agent
Harness Dickey & Pierce
US
Assignee
Walter Lorenz Surgical
FL, US
IPC
A61B 17/56
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