Differences in Femoral Head Penetration Between Highly Cross-Linked Polyethylene Cemented Sockets and Uncemented Liners |
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| Institution: | 1. Third Hospital of Hebei Medical University, Department of Orthopaedic Surgery, Shijiazhuang, Hebei, 050051, China;2. Hebei Medical University, Shijiazhuang, Hebei, 050051, China;1. Arthritis Surgery Research Foundation, Miami, Florida;2. Florida International University, Miami, Florida;3. University of Miami/Florida International University, Miami, Florida;1. Department of Orthopaedic Surgery, UConn Musculoskeletal Institute, University of Connecticut, 263 Farmington Avenue, Farmington, CT 06034, USA;2. Department of Geriatrics, Neurosciences and Orthopaedics, Policlinico Agostino Gemelli, Catholic University of Rome, Largo Francesco Vito 1, Rome 00135, Italy;3. Department of Orthopaedic Sports Medicine, Technical University Munich, Ismaninger Street 22, Munich 81675, Germany;4. Department of Orthopaedic Surgery, UConn Musculoskeletal Institute, UConn Health, University of Connecticut, 263 Farmington Avenue, Farmington, CT 06034, USA;1. Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore;2. Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore |
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| Abstract: | BackgroundThis study aimed at investigating differences in femoral head penetration between highly cross-linked polyethylene (HXLPE) cemented sockets and uncemented liners during 5 years postoperatively.MethodsNinety-six patients (106 hips) with a mean age of 64.4 (range, 35-83) years underwent total hip arthroplasty using a HXLPE cemented socket or liner and were respectively divided into cemented (35 patients 37 hips]) and uncemented (61 patients 69 hips]) groups. Femoral head penetrations were evaluated on both anteroposterior (AP)-view and Lauenstein-view radiographs, and mean polyethylene (PE) wear rates were calculated based on femoral head penetration from 2 to 5 years. Multivariate analyses were performed to assess risk factors for PE wear.ResultsAt 5 years postoperatively, the cemented and uncemented groups exhibited proximal direction femoral head penetrations of 0.103 mm and 0.124 mm (P = .226) and anterior direction penetrations of 0.090 mm and 0.151 mm (P = .002), respectively. The corresponding mean PE wear rates were 0.004 mm/y and 0.009 mm/y in the AP-view (P = .286) and 0.005 mm/y and 0.012 mm/y in the Lauenstein-view (P = .168), respectively. Left-side operation and high activity were independent risk factors for PE wear on AP-view.ConclusionWhen HXLPE was used, all mean PE wear rates were very low and those of cemented sockets and uncemented liners were very similar. PE particle theory suggests that the occurrence of osteolysis and related aseptic loosening might consequently decrease. |
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| Keywords: | highly cross-linked polyethylene femoral head penetration polyethylene wear cemented uncemented total hip arthroplasty |
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