title: Avoiding Hip Instability and Limb Length Discrepancy After Total Hip Arthroplasty.
abstract: Two complications after total hip arthroplasty (THA) are hip instability and limb length discrepancy; instability is a common indication for revision THA. The goal of a successful THA is to maximize impingement-free range of motion, recreate appropriate offset, and equalize limb length discrepancies to produce a pain-free and dynamically stable THA. In this article, the patient risk factors for dislocation and limb length discrepancy, key elements of the preoperative template, the anatomic landmarks for accurate component placement, the leg positions for soft tissue stability testing, and the management of postoperative instability are reviewed.
authors.affiliation: Department of Orthopedic Surgery, Mayo Clinic, 200 First Street, Southwest, Rochester, MN 55905, USA. Electronic address: sculcop@hss.edu.
authors.forename: Peter K
authors.initials: PK
authors.lastname: Sculco
authors.affiliation: Department of Orthopedic Surgery, Mayo Clinic, 200 First Street, Southwest, Rochester, MN 55905, USA.
authors.forename: Umberto
authors.initials: U
authors.lastname: Cottino
authors.affiliation: Department of Orthopedic Surgery, Mayo Clinic, 200 First Street, Southwest, Rochester, MN 55905, USA.
authors.forename: Matthew P
authors.initials: MP
authors.lastname: Abdel
authors.affiliation: Department of Orthopedic Surgery, Mayo Clinic, 200 First Street, Southwest, Rochester, MN 55905, USA.
authors.forename: Rafael J
authors.initials: RJ
authors.lastname: Sierra
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D006622:Hip Prosthesis; D006801:Humans; D007593:Joint Instability / Q000209:etiology / Q000517:prevention & control*; D007870:Leg Length Inequality / Q000209:etiology / Q000517:prevention & control*; D011474:Prosthesis Design
keywords: Component position; Instability; Limb length discrepancy; Preoperative templating; Total hip arthroplasty