US Patent 6,520,961
United States Patent and Trademark Office
University of Iowa Research Foundation (Iowa City, IA, US)
An apparatus for aligning a mechanical pivot axis of an external fixator with an anatomical pivot axis of a hinged joint. The hinged joint has first and second bones on opposite sides of the anatomical pivot axis. The external fixator has a central body connecting a first bone screw clamping assembly and a second bone screw clamping assembly. The central body includes the mechanical pivot axis. The apparatus for aligning includes an alignment member and a connecting member. The alignment member has a longitudinal axis for alignment with the anatomical pivot axis. The connecting member has a first end adjustably secured to the alignment member and a second end adjustably secured to the first bone screw clamping assembly.
Marsh, Lawrence J. Method and apparatus for external fixation of a hinged joint. US Patent 6,520,961 filed November 28, 2000 and issued February 18, 2003. https://ir.uiowa.edu/patents/323