Christian Bitar1,2, Ivan Moberg3, Ferid Krupic4, Per Wretenberg1,5, Volker Otten3, Sead Crnalic3. 1. Department of Clinical Science, Intervention and Technology, Karolinska Institute, Stockholm, Sweden. 2. Department of Orthopaedics, Karolinska University Hospital, Stockholm, Sweden. 3. Department of Surgical and Perioperative Sciences (Orthopaedics), Umeå University, Umeå, Sweden. 4. Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. 5. Department of Orthopaedics, School of Medical Sciences, Örebro University and Örebro University Hospital, Örebro, Sweden.
Abstract
Background: We analysed the long-term revision rate, clinical outcomes and metal ion concentrations in blood over time in patients who had undergone metal-on-metal Articular Surface Replacement (ASR) hip arthroplasty. Methods: A total of 38 patients (43 hips) were included: 24 patients (28 hips) underwent large-head total hip arthroplasty (XL THA), and 14 patients (15 hips) underwent hip resurfacing arthroplasty (HRA). The median follow-up time was 11 (range 7-12) years. Results: None of 15 HRA implants were revised. Nine of 28 XL THA implants (32%) in 8 patients were revised. The Co ion levels significantly increased in the XL THA group (p=0.009) over a median time period of 84 (25-97) months. Conclusion: The levels of Co ions in blood were higher in the patients who had undergone XL THA and increased significantly over time.
Background: We analysed the long-term revision rate, clinical outcomes and metal ion concentrations in blood over time in patients who had undergone metal-on-metal Articular Surface Replacement (ASR) hip arthroplasty. Methods: A total of 38 patients (43 hips) were included: 24 patients (28 hips) underwent large-head total hip arthroplasty (XL THA), and 14 patients (15 hips) underwent hip resurfacing arthroplasty (HRA). The median follow-up time was 11 (range 7-12) years. Results: None of 15 HRA implants were revised. Nine of 28 XL THA implants (32%) in 8 patients were revised. The Co ion levels significantly increased in the XL THA group (p=0.009) over a median time period of 84 (25-97) months. Conclusion: The levels of Co ions in blood were higher in the patients who had undergone XL THA and increased significantly over time.
Authors: Harry S Hothi; Reshid Berber; Robert K Whittaker; Gordon W Blunn; John A Skinner; Alister J Hart Journal: J Arthroplasty Date: 2015-11-26 Impact factor: 4.757
Authors: Vincent P Galea; Pakdee Rojanasopondist; Sean J Matuszak; James W Connelly; Gabrielle S Ray; Rami Madanat; Orhun Muratoglu; Henrik Malchau Journal: Hip Int Date: 2019-11-20 Impact factor: 2.135