Total Hip Arthroplasty in Hip Ankylosis

Abstract

AbstractHip ankylosis refers to a fusion of the hip joint with a limited range of motion. Hip replacement in patients with hip ankylosis is a major challenge for joint surgeons because of the severely limited range of motion, poor soft tissue compliance, weak abductors, muscle imbalance, and a high risk of perioperative complications. In hip joint ankylosis, contamination of the surgical site during disinfection and draping is more likely than in routine hip replacements. Both legs should be disinfected at the same time. During the cutting of the femoral neck in situ, injury to the normal acetabular bone, especially the anterior acetabular wall, should be avoided. If neck exposure proves difficult, sliding or extended osteotomy of the greater trochanter can be considered. Considering the retroversion of the pelvis and the relative hyperextension of the hip joint postoperatively, the cup should be placed with a relatively small anteversion to avoid posterior impingement and anterior dislocation.