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Failure of a Constrained Acetabular Prosthesis of a Total Hip Arthroplasty. A Report of Four Cases*
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Investigation performed at the Section of Orthopaedic Surgery, Department of Surgery, Dartmouth-Hitchcock Medical Center, Lebanon
J Bone Joint Surg Am, 1998 Apr 01;80(4):561-5
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Instability with recurrent dislocation after total hip arthroplasty is a formidable challenge to the orthopaedic surgeon. The prevalence of dislocation has been reported to be 1 to 8 per cent in series ranging from 300 to 10,500 total hip arthroplasties4-6,10,16. Relative risk factors for dislocation include a previous operation on the hip, the type of operative approach used, the selection and orientation of the components, the method of postoperative management, an altered neuromuscular status, and lack of patient cooperation3-6,9,10,12,16. The use of a constrained acetabular polyethylene liner provides the orthopaedic surgeon with another option with which to address the problem of instability.
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    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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