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. 2021 Dec;30(12):2795-2803.
doi: 10.1016/j.jse.2021.04.032. Epub 2021 May 10.

Midterm clinical and radiologic survivorship of a stemless total shoulder arthroplasty

Tristan E McMillan  1 , David W Neilly  2 , L A Kash Khan  2 , David Cairns  2 , Scott L Barker  2 , Kapil Kumar  2
Affiliations

Midterm clinical and radiologic survivorship of a stemless total shoulder arthroplasty

Tristan E McMillan et al. J Shoulder Elbow Surg. 2021 Dec.

Abstract

Aim: The aim of this study was to evaluate the clinical and radiologic outcomes of stemless total shoulder arthroplasty (TSA) in patients with glenohumeral arthritis.

Patients and methods: This is a retrospective case series of all patients who underwent a TSA with Affinis Short prosthesis during the period 2010-2017. Seventy-two TSAs were performed within our unit, in 62 patients (45 females and 17 males), with 10 patients having bilateral TSAs with this prosthesis. The mean follow-up was 3.9 years (2-8.7 years). Patients were evaluated clinically with the Oxford Shoulder Score, range of movement assessment, and a numerical patient satisfaction score. Follow-up radiographs were evaluated by 2 reviewers assessing for lucency and assigned a Lazarus grade.

Results: Six patients were lost to follow-up prior to their 2-year review. At last follow-up, the mean forward elevation was 157° (80°-180°), abduction was 150° (60°-180°), and external rotation was 39° (20°-60°). The mode internal rotation was to the lumbar spine, with 95% of patients achieving internal rotation to L5 or higher. The mean Oxford Shoulder Score was 45 (18-48). The mean patient satisfaction score was 4.93/5. No humeral lucencies were observed. Sixty-four percent (n=47) of the glenoids were Lazarus grade 0, showing no evidence of radiolucency. The remaining patients were Lazarus grade 1-3, although none were progressive and all patients were asymptomatic. No patients were revised for aseptic loosening. Four patients underwent revision: 1 for infection, 1 for heterotrophic ossification and stiffness, and 2 for rotator cuff failure.

Conclusion: Midterm follow-up results indicate good clinical and radiologic survivorship for this stemless TSA. Our findings suggest good patient function and satisfaction, and no patients have required revision for aseptic loosening. Further follow-up is required to determine long-term survivorship.

Keywords: Glenohumeral arthritis; TSA; glenoid lucency; shoulder arthroplasty; shoulder replacement; stemless; stemless humeral component.

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