Thibault Vermersch1, Anthony Viste2,3,4,5, Romain Desmarchelier1, Michel-Henri Fessy1,6,7,8. 1. Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, Service de Chirurgie Orthopedique et Traumatologique, 165 Chemin Grand Revoyet, 69495, Pierre-Bénite, France. 2. Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, Service de Chirurgie Orthopedique et Traumatologique, 165 Chemin Grand Revoyet, 69495, Pierre-Bénite, France. anthony.viste@chu-lyon.fr. 3. Université de Lyon, 69622, Lyon, France. anthony.viste@chu-lyon.fr. 4. Université Claude Bernard Lyon 1, 69100, Villeurbanne, France. anthony.viste@chu-lyon.fr. 5. IFSTTAR, UMRT_ 9406, Laboratoire de Biomécanique et Mécanique des Chocs, 69675, Bron, France. anthony.viste@chu-lyon.fr. 6. Université de Lyon, 69622, Lyon, France. 7. Université Claude Bernard Lyon 1, 69100, Villeurbanne, France. 8. IFSTTAR, UMRT_ 9406, Laboratoire de Biomécanique et Mécanique des Chocs, 69675, Bron, France.
Abstract
PURPOSE: The aim of our study was to assess the radio-clinical results, mid-term survivorship and dislocation rate of a new-generation dual-mobility cup. METHODS: The first 100 patients (104 primary total hip arthroplasties) who were implanted with a new-generation cementless dual-mobility cup (Sunfit TH, Serf, Décines) were included in our study, with a minimum follow-up of five years. RESULTS: Average follow-up was six years ± 0.44 (5-7). At last follow-up, the Harris and PMA scores were significantly improved, from 56 to 94 and 13 to 17 respectively (p < 0.001). No radiolucent line could be observed. There were no cases of prosthetic or intraprosthetic dislocation in our series. Survivorship without cup loosening as the endpoint was 100 %. CONCLUSIONS: This study confirmed the interest of dual mobility in preventing prosthetic hip dislocation. Intraprosthetic dislocation is a complication that seems to have been resolved in the mid-term follow-up.
PURPOSE: The aim of our study was to assess the radio-clinical results, mid-term survivorship and dislocation rate of a new-generation dual-mobility cup. METHODS: The first 100 patients (104 primary total hip arthroplasties) who were implanted with a new-generation cementless dual-mobility cup (Sunfit TH, Serf, Décines) were included in our study, with a minimum follow-up of five years. RESULTS: Average follow-up was six years ± 0.44 (5-7). At last follow-up, the Harris and PMA scores were significantly improved, from 56 to 94 and 13 to 17 respectively (p < 0.001). No radiolucent line could be observed. There were no cases of prosthetic or intraprosthetic dislocation in our series. Survivorship without cup loosening as the endpoint was 100 %. CONCLUSIONS: This study confirmed the interest of dual mobility in preventing prosthetic hip dislocation. Intraprosthetic dislocation is a complication that seems to have been resolved in the mid-term follow-up.
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