Implants, and processes for installing them, which replace the medial condyleand portions of the patellofemoral channel but preferably not portions of thelateral condyle that articulate relative to the tibia. Processes are providedwhich allow proper location and orientation of an anterior resection and a distalresection on the femur, which make use of a transition point which can be designatedon the bone, for navigating proper positioning of such implants. Proper positioningof the implant relative to the femur for insuring a smooth transition betweenlateral portions of the implant and the lateral condyle is thus reduced to determiningproper medial / lateral location of the implant on the anterior and distal resections.Such implants and processes can allow, among other things, for controlled locationand orientation of an implant on the bone which saves lateral compartment bone,which eliminates the need to sacrifice the anterior and posterior cruciate ligaments,and which is adapted for minimally invasive surgery with its attendant benefits.
