Arthopor 2 acetabular component with screw fixation in primary hip arthroplasty: A 7- to 9-year follow-up study |
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| Institution: | 1. From the Division of Endocrinology, Diabetes, Metabolism and Nutrition, Mayo Clinic, Rochester, Minnesota;2. Divisions of Endocrinology and Geriatrics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin;3. Loyola University Medical Center, Loyola University Osteoporosis and Metabolic Bone Disease Center, Maywood, Illinois;4. Division of Endocrinology, University of Cincinnati, Cincinnati, Ohio;5. Division of Endocrinology and Metabolism, Mayo Clinic, Rochester, Minnesota;6. Harvard Medical School, Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center, Boston, Massachusetts;7. Division of Endocrinology, Metabolism and Lipids, Department of Medicine, Emory University, School of Medicine, Atlanta, Georgia, Division of Endocrinology, Atlanta VA Medical Center, Decatur, Georgia.;1. SIMAU, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy;2. DISCO, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy;3. DIMeC, University of Modena and Reggio Emilia, via Vignolese 905/B, Modena 41125, Italy;4. DISPEA, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy;5. Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland;1. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, PR China;2. Shanghai Key Laboratory of Digital Manufacture for Thin-Walled Structures, Shanghai Jiao Tong University, Shanghai 200240, PR China;3. Department of Mechanical Engineering, Research Institute for Advanced Manufacturing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;4. PolyU Shenzhen Research Institute, No. 18 Yuexing Road, Nanshan District, Shenzhen, PR China |
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| Abstract: | The first 100 consecutive primary hip arthroplasties with the Arthopor 2 acetabular component (Joint Medical Products, Stamford, CT) with supplemental screw fixation performed by the senior author were prospectively studied. The mean patient age was 57 years. Seventy-seven cemented and 23 cementless stems were placed, with 32-mm femoral heads used in most of the patients. Eighty-six hips were reviewed at 7–8.8 years (mean, 7.8 years). The mean Harris hip score at final follow-up evaluation was 94 points. No cups have been revised, although 2 cups in patients with radiation osteonecrosis were loose radiographically. One patient underwent revision of a severely worn liner. Despite a relatively high mean linear wear rate of 0.27 mm/y (range, 0.13–0.57 mm/y), no radiographic evidence of pelvic osteolysis was seen. The Arthopor 2 cup performed well with respect to pelvic osteolysis, despite the presence of substantial polyethylene debris. The relatively high polyethylene wear rate is attributed in part to the younger patient population and the use of 32-mm femoral heads paired with thin polyethylene liners. |
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