Use of constrained acetabular components for hip instability: an average 10-year follow-up study |
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| Institution: | 1. Department of Orthopaedic Surgery, Mayo Clinic, Rochester, Minnesota, USA;2. Des Moines Orthopaedic Surgeons, West Des Moines, Iowa, USA;3. Department of Orthopaedic Surgery, University of Iowa Health Care, Iowa City, Iowa, USA;4. Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, Indiana, USA;1. American Hip Institute Research Foundation, Des Plaines, Illinois, U.S.A.;2. American Hip Institute, Des Plaines, Illinois, U.S.A.;3. Northwestern University Feinberg School of Medicine, Chicago, Illinois, U.S.A.;1. High Point University, School of Health Sciences, Department of Physical Therapy, High Point, USA;2. Carroll University, Department of Physical Therapy, Waukesha, USA;3. Department of Physical and Occupational Therapy, University of Illinois Hospital and Health Sciences System, Chicago, USA;4. Exercise Science Program, High Point University, High Point, USA;5. Biology and Exercise Science Programs, High Point University, High Point, USA;1. Department of Orthopaedic Surgery, Rush University, Chicago, Illinois;2. Department of Orthopaedic Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio |
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| Abstract: | The short-term efficacy of using constrained acetabular components for hip instability in the total hip arthroplasty construct has been documented. However, long-term concerns including late dislocation, loosening of components, and osteolysis have not been addressed. The authors evaluated, at an average 10.3-year follow-up, 101 tripolar constrained components (Stryker Howmedica Osteonics) used in the total hip arthroplasty construct. At final follow-up, 6 hips had dislocated or had failure of the constrained component, 5 of which were revised. In addition, 4 hips were revised for aseptic loosening of the acetabular component, 4 hips were revised for aseptic femoral loosening, and 1 hip was revised for acetabular osteolysis. Considering the complexity of the cases, this component has provided durable fixation and hip stability at this intermediate-term follow-up. |
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