摘要Rotating-hinge total knee prostheses are often used for the treatment of global instability or severe bone loss around the knee,which is often accompanied by severe deformity.1 Competent and functional collateral ligaments are a prerequisite for performance of conventional total knee arthroplasty (TKA).In cases of primary surgery for knees with severe deformities or in revision surgery for knees with substantial bone loss,standard condylar implants do not allow for proper stabilization of the joint.Under these circumstances,condylar TKA designs will fail within a short period of time,or other complications such as anterior knee pain will occur soon after surgery.2
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