Pyrocarbon Hemiarthroplasty of the Shoulder: Indications and Pitfalls

Abstract Aims : The outcomes with metal head hemiarthroplasties (HA) are contrasted, especially in young, active patients. An innovative Pyrocarbon interface was introduced in 2014 in order to decrease potential glenoid wear. The aim of this study is to evaluate survival and short-term results of HA with a pyrocarbon head. Methods : We conducted a retrospective single-centre study: 30 consecutive patients underwent HA with pyrocarbon humeral head and were assessed with a minimum follow-up of 2 years. The mean age at surgery was 54 +/- 13 years; 38% of patients (n=13) had undergone surgery at least once on the affected shoulder. Depending on the aetiology, 4 groups were analysed: group 1 (osteonecrosis, n=12), group 2 (primary gleno humeral osteoarthritis, n=10), group 3 (fracture sequelae, n=4) and group 4 (revision, n=4). Results : A significant improvement in clinical results was documented at mean follow-up of 38 months: mean Constant score (preop 35+/-15 vs. postop 67+/-19 points; Conclusion : HemiPYC provided satisfactory clinical outcomes without glenoid wear at short-term follow-up. Disappointing results were recorded in the case of severe fracture sequelae. Mid and long-term studies should be carried out to confirm these results.