title: Sliding trochanteric osteotomy preserves favorable abductor biomechanics in revision total hip arthroplasty.
abstract: The outcome of sliding trochanteric osteotomy in revision total hip arthroplasty was assessed by comparing preoperative and postoperative static radiographic biomechanics and clinical hip abductor function of 22 consecutive operations (20 patients). Preoperative and postoperative pelvic radiographs were reviewed to quantify the biomechanical reconstruction of the hip abductor mechanism. Abductor muscle length and abductor moment arm were increased significantly (P <.05) by the operation. There was a significant (P <.05) increase in maximum degrees of active hip abduction from the preoperative to the postoperative state, an average of 32 months (range, 6-65 months) after surgery. The dysfunction index (a radiographic representation of hip torque) correlated positively (r =.63; P <.05) with active hip abduction. Sliding trochanteric osteotomy improves abductor biomechanics and may protect against trochanteric migration in revision total hip arthroplasty.
authors.affiliation: Division of Orthopaedic Surgery, Stanford University School of Medicine, 300 Pasteur Drive, R-144, Stanford, CA 94305-5341, USA.
authors.forename: A C
authors.initials: AC
authors.lastname: Romero
authors.forename: S
authors.initials: S
authors.lastname: Imrie
authors.forename: S B
authors.initials: SB
authors.lastname: Goodman
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D001696:Biomechanical Phenomena; D005260:Female; D005269:Femur / Q000601:surgery*; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000000981:diagnostic imaging / Q000502:physiology; D010027:Osteotomy / Q000379:methods; D011183:Postoperative Complications; D011859:Radiography; D012086:Reoperation