Polyethylene wear and periprosthetic osteolysis in metal-backed acetabular components with cylindrical liners |
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| Institution: | 1. Department of Oral and Maxillofacial Clinical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia;2. Department of Oral Biology, Faculty of Dentistry, MAHSA University, Saujana Putra, Selangor, Malaysia;3. Department of Anatomy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia;1. Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomedical Materials, Tianjin 300192, China;2. Department of Clinical Pharmacology, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China;1. Département de chirurgie orthopédique, CHU de Lyon Croix-Rousse, hospices civils de Lyon, 69004 Lyon, France;2. Service de maladies infectieuses, CHU de Lyon Croix-Rousse, hospices civils de Lyon, 69004 Lyon, France;3. Centre de référence des infections ostéo-articulaires complexes Rhône-Alpes-Auvergne, hospices civils de Lyon, 69004 Lyon, France;4. Laboratoire de biomécanique et mécanique des chocs, université Claude-Bernard Lyon 1, 69004 Lyon, France |
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| Abstract: | A retrospective clinical and radiographic analysis was performed in 27 hips (23 patients), in which a threaded, porous-coated acetabular component with cylindrical liner was implanted (Sintered T-Tab-ST cup, Biomet, Warsaw, IN). Sixteen hips had cemented stems; 11 had cementless, circumferentially porous-coated stems. The mean clinical and radiographic follow-up period was 68 months. The mean patient age was 49 years; the mean patient weight was 68 kg. The mean rates of linear and volumetric wear were 0.25 mm/y and 149 mm3/y, respectively. Osteolysis occurred in 51.8% (14 hips). Wear rate and young age correlated with osteolysis (P = .0002 and P = .01, respectively). There were no cases of distal femoral osteolysis. |
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