ARTIFICIAL KNEE JOINT FOR PREVENTING LIGAMENT INJURY

摘要

This invention relates to an artificial knee joint which can prevent the injury of a ligament and replace a natural knee joint. More particularly, this invention relates to an artificial knee joint which includes: a femur joint member which is joined to an end portion of a tibia near a femur; a tibia joint member which is joined to an end portion of the femur near the tibia; and a bearing member which is placed between the femur and tibia joint members. A chamber is formed at an end portion of a posterior condyle in the femur joint member to prevent the injury of a ligament caused by the flection of the femur joint member in the case of knee exercise. In addition, a CR type operation is used in the insertion of the artificial knee joint in order to preserve the posterior cruciate ligament. At this time, as there is the possibility that the posterior cruciate ligament may be injured due to the flection of the femur joint member, an additional chamber is formed at an inner side of an end portion in the posterior condyle. Furthermore, a chamber is formed at a posterior protrusion in the bearing member to prevent a ligament from colliding against the bearing. Consequently the injury of the ligament can be prevented. For this purpose, the artificial knee joint includes: the femur joint member that is joined to an end portion of a tibia near a femur; the tibia joint member that is joined to an end portion of the femur near the tibia; and the bearing member that is placed between the femur and tibia joint members, the end portion of the posterior condyle at the femur joint member includes an external chamber to prevent the collision of a lateral ligament against the femur joint member. Provided is an artificial knee joint that is able to prevent injury to a ligament.