2009/06/30 by Alexandre Terrier, A. Terrier, F. Merlini +5
Medicine · #Biomedical engineering #Composite material #Materials science #Medicine #Orthodontics #Orthopaedic implants and arthroplasty #Polyethylene #Prosthesis #Shoulder Injury and Treatment #Shoulder Prosthesis #Surgery #Total Knee Arthroplasty Outcomes
paper · pdf · doi:10.1302/0301-620x.91b7.21999
openalex publication_date 2009/06/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
Wear of polyethylene is associated with aseptic loosening of orthopaedic implants and has been observed in hip and knee prostheses and anatomical implants for the shoulder. The reversed shoulder prostheses have not been assessed as yet. We investigated the volumetric polyethylene wear of the reversed and anatomical Aequalis shoulder prostheses using a mathematical musculoskeletal model. Movement and joint stability were achieved by EMG-controlled activation of the muscles. A non-constant wear factor was considered. Simulated activities of daily living were estimated from in vivo recorded data. After one year of use, the volumetric wear was 8.4 mm(3) for the anatomical prosthesis, but 44.6 mm(3) for the reversed version. For the anatomical prosthesis the predictions for contact pressure and wear were consistent with biomechanical and clinical data. The abrasive wear of the polyethylene in reversed prostheses should not be underestimated, and further analysis, both experimental and clinical, is required.