Michel-Henri Fessy1, Laurent Jacquot2, Jean-Charles Rollier2, Julien Chouteau2, Tarik Ait-Si-Selmi3, Hugo Bothorel4, Jean-Christophe Chatelet5. 1. Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, Service de Chirurgie Orthopédique et Traumatologique, Pierre-Bénite Cedex, France; IFSTTAR, UMRT_9406, Laboratoire de Biomécanique et Mécanique des Chocs, Bron, France; Artro Group Institute, Lyon, France. 2. Artro Group Institute, Lyon, France; Ramsay Générale de Santé, Department of Orthopaedic Surgery, Clinique d'Argonay, Annecy, France. 3. Artro Group Institute, Lyon, France; Ramsay Générale de Santé, Hôpital Privé Jean Mermoz, Centre Orthopédique Santy, Lyon, France. 4. ReSurg SA, Nyon, Switzerland. 5. Artro Group Institute, Lyon, France; Ramsay Générale de Santé, Centre de Chirurgie Orthopédique du Beaujolais, Arnas, France.
Abstract
BACKGROUND: The efficacy of contemporary monoblock dual-mobility (DM) cups to prevent dislocations in total hip arthroplasty (THA) is well reported, but there is little published data on their mid- to long-term outcomes. The authors aimed at reporting the 10-year survival of a contemporary DM cup as well as its clinical and radiographic outcomes. METHODS: From a retrospective consecutive multicentric series of 516 patients (541 hips) that received uncemented THA between June 2007 and June 2010, 6 patients (6 hips) had cup and stem revisions, 5 patients (5 hips) had isolated stem revision, and 2 patients (2 hips) had isolated insert revision. A total of 103 patients (111 hips) died with their original implants, and 41 patients (42 hips) were lost to follow-up. This left 358 patients (375 hips) for clinical assessment at a median follow-up of 8.7 years (range, 6.8-10.5 years), including 279 patients (290 hips) with postoperative radiographs. Implant survival was calculated using the Kaplan-Meier method, and multivariable analyses were performed to determine whether clinical outcomes are associated with patient or surgical factors. RESULTS: The 10-year survival considering revision for aseptic loosening as end point was 100% for the cup and 99.2% for the stem. No dislocations were observed, and radiographic assessment revealed 1 acetabular granuloma (0.3%), but no radiolucencies nor fractures. The Harris hip score improved from 49.6 ± 15.5 to 85.2 ± 14.5, and the postoperative Oxford hip score was 19.2 ± 7.6. Multivariable analyses revealed that improvement in Harris hip score increased with cup diameter (beta, 1.28; P = .039). CONCLUSION: Our data confirmed satisfactory midterm outcomes of uncemented THA using a contemporary DM cup, with no dislocations nor cup revisions due to aseptic loosening. LEVEL OF EVIDENCE: Level IV, retrospective cohort study.
BACKGROUND: The efficacy of contemporary monoblock dual-mobility (DM) cups to prevent dislocations in total hip arthroplasty (THA) is well reported, but there is little published data on their mid- to long-term outcomes. The authors aimed at reporting the 10-year survival of a contemporary DM cup as well as its clinical and radiographic outcomes. METHODS: From a retrospective consecutive multicentric series of 516 patients (541 hips) that received uncemented THA between June 2007 and June 2010, 6 patients (6 hips) had cup and stem revisions, 5 patients (5 hips) had isolated stem revision, and 2 patients (2 hips) had isolated insert revision. A total of 103 patients (111 hips) died with their original implants, and 41 patients (42 hips) were lost to follow-up. This left 358 patients (375 hips) for clinical assessment at a median follow-up of 8.7 years (range, 6.8-10.5 years), including 279 patients (290 hips) with postoperative radiographs. Implant survival was calculated using the Kaplan-Meier method, and multivariable analyses were performed to determine whether clinical outcomes are associated with patient or surgical factors. RESULTS: The 10-year survival considering revision for aseptic loosening as end point was 100% for the cup and 99.2% for the stem. No dislocations were observed, and radiographic assessment revealed 1 acetabular granuloma (0.3%), but no radiolucencies nor fractures. The Harris hip score improved from 49.6 ± 15.5 to 85.2 ± 14.5, and the postoperative Oxford hip score was 19.2 ± 7.6. Multivariable analyses revealed that improvement in Harris hip score increased with cup diameter (beta, 1.28; P = .039). CONCLUSION: Our data confirmed satisfactory midterm outcomes of uncemented THA using a contemporary DM cup, with no dislocations nor cup revisions due to aseptic loosening. LEVEL OF EVIDENCE: Level IV, retrospective cohort study.
Authors: Alexander M Upfill-Brown; Noah D Paisner; Patrick C Donnelly; Ayushmita De; Adam A Sassoon Journal: J Arthroplasty Date: 2022-03-17 Impact factor: 4.435
Authors: Loes W A H Van Beers; Bart C H Van Der Wal; Tess Glastra Van Loon; Dirk Jan F Moojen; Marieke F Van Wier; Amanda D Klaassen; Nienke W Willigenburg; Rudolf W Poolman Journal: Acta Orthop Date: 2020-08-04 Impact factor: 3.717