Surgical apparatus for implantation of a partial of total knee prosthesis

Surgical method for implantation of a partial or total knee prosthesis comprising at least a patellar implant and a femoral implant, wherein the following steps are carried out in succession in a peroperative period:

• the bones of the kneecap and femur of a patient to be treated are spatially marked out,
• the kneecap which is to be fitted with the prosthesis and is provided virtually with the patellar implant and the lower part of the femur which is to be fitted with the prosthesis and is provided virtually with the femoral implant are represented in a simultaneous and relative representation, this representation being effected in a sagittal plane passing both through the kneecap and also through an intercondylar trochlea of the femoral implant,
• the virtual implantation of the patellar implant on the kneecap and, if appropriate, the virtual implantation of the femoral implant on the femur is adjusted such that the antero-posterior size of the femoral and patellar implants corresponds substantially to the anatomical size in the patient being operated on,
• the configuration of implantation of the patellar implant obtained according to the adjustment is selected and memorized, and
• the real patellar implant is implanted on the kneecap of the patient according to the configuration of implantation that has been selected and memorized.