Outcomes for the anatomic hybrid glenoid total shoulder arthroplasty system, A 6-year median follow-up.

BACKGROUND: The next-generation anatomic total shoulder arthroplasty with hybrid glenoid fixation (AHG) is designed to reduce the incidence of glenoid component loosening. The primary aim is to assess the survival of AHG implant.

METHODS: Retrospective review of prospectively collected data on AHG between 2010 and 2020, including Clinical data, radiographs, Oxford Shoulder (OSS) and Constant Shoulder scores, which were collected and analysed using GraphPad Prism.

RESULTS: A total of 51 AHGs in 46 patients were identified with median 6.0 years follow-up (IQR 4.8-7.0 years). Only one case required revision for aseptic loosening of the glenoid component at 3 years. Overall survivorship of AHG was 97.6% at 7 years. OSS at 1 year improved significantly (median: 42, IQR 35-48 vs. median: 20, IQR 15-26.5; p < .05). All range of movement at 1 year significantly improved (p < .05): flexion (median 132.5, IQR 105-150 vs. 90, IQR 70-97.5); abduction (median 130, IQR 100-150 vs. 60, IQR 50-90); external rotation (mean 50.9 vs. 22.8 degrees, SD ± 19.1) and non-parametric improvement in internal rotation. These improvements were maintained at the latest follow-up.

DISCUSSION: AHG implants demonstrate a high survivorship rate whilst maintaining excellent range of movement and patient-reported outcome scores to support its continued use.