Abstract: A device for guiding a cutting tool capable of cutting bone portions at the level of the head of a bone includes a seat intended to be fastened at the level of said head defining a first rotation axis (?). The device includes means for adjusting the position of the first rotation axis with respect to said seat and an arm, with one end of said arm being pivotally assembled on said seat according to the first rotation axis. A guide intended to support the tool is pivotally assembled on the arm according to a second rotation axis (?).

Abstract: A computer assisted orthopedic surgery system for ligament graft reconstruction includes a system for obtaining data indicative of a location for ligament graft placement with respect to at least a first bone and a second bone. The system includes a position determining device that is capable of tracking the relative movements of the first and second bones using reference bodies that are attached to the first and second bones and a pointer that has a tip for contacting a surface of at least one of the first and second bones to capture one or more reference points. The system further includes a computer that is configured to determine and track intraoperative positions of the reference bodies and the pointer and to provide isometric and impingement data for a ligament graft placement based on a realistic simulation of a trajectory of a deformable ligament graft.