PROBLEM TO BE SOLVED: To obtain a motion close to the motion of a knee joint of a living body by saving an anterior cruciate ligament or manufacturing the ligament as an artificial one, allowing a U shape cut in the rear part of a tibial bone component to be deeper, forming a hole, and putting the anterior cruciate ligament through the hole.SOLUTION: An artificial knee joint includes: a femoral component mounted on a distal end of a femoral bone and having an internal condyle and an external condyle and a tibial bone component mounted on a proximal end of a tibial bone and having an inner joint face and an outer joint face for respectively rotatably and slidably receiving the internal condyle and the external condyle. When an injury level of an anterior cruciate ligament is lower, a U shape cut to be formed in a rear part between the inner joint face and the outer joint face of the tibial bone component is deeply extended forward. Then, a tibial bone to which the anterior cruciate ligament is attached is left unresected in the U shape cut.COPYRIGHT: (C)2014,JPO&INPIT【課題】 前十字靱帯を温存又は人工のもので製作し、脛骨コンポーネントの後部のU字形カットを更に深くしたり、孔を形成してこれに前十字靱帯を通すことで生体膝関節に近い動きをさせる。【解決手段】 大腿骨の遠位端に装着され、内顆と外顆とを有する大腿骨コンポーネントと、脛骨の近位端に装着され、内顆と外顆とをそれぞれ回転及び摺動可能に受ける内関節面と外関節面とを有する脛骨コンポーネントとからなる人工膝関節において、前十字靱帯の損傷度が低い場合、脛骨コンポーネントの内関節面と外関節面との間の後部に形成されるU字形カットを前方に深く延ばし、このU字形カットの中に前十字靱帯が付着している脛骨を未切除で残す。【選択図】 図7
