An instrument for determining the variation in tension of a ligament graft extending between first and second proposed fixation sites positioned on first and second articulated bones, respectively, comprises a yoke which carries a device for securing the yoke to one of the first and second bones. A yoke...http://www.google.ca/patents/US4969895?utm_source=gb-gplus-sharePatent US4969895 - Apparatus and method for determining the tension on a ligament graft
