Devices are provided for knee joint replacement with anterior cruciate ligament (ACL) substitution. Generally, the devices can allow a knee joint to be partially or totally replaced in conjunction with substitution of the knee joint's ACL. In one aspect, a medical device is provided that includes a tibial implant (36), a femoral implant (34), and a post (38). The tibial implant has an inferior surface and an opposite, superior surface. The inferior surface is configured to be fixed to a tibia of a patient. The femoral implant is mateable to the tibial implant and has an inferior surface and an opposite, superior surface. The post extends from the superior surface of the tibial implant near an edge thereof.前十字靭帯（ＡＣＬ）代替付膝関節置換の方法および器具を提供する。一般に、方法および器具が膝関節が膝関節のＡＣＬの代替と共に部分または全部置換される。1つの実施形態で、膝置換人工器官が内側または外側大腿骨インプラント、大腿骨顆間ノッチ構造、内側または外側脛骨インサート、およびＡＣＬ代替部材を含む。ＡＣＬ代替部材が、膝動作の間および／または初期膝屈曲のみの間に大腿骨顆間ノッチ構造と係合するように構成される。【選択図】図１
