Two-year results of stemless total shoulder arthroplasty in patients with primary osteoarthritis

This study presents functional and radiological results of a single surgeon series of consecutive patients who underwent stemless total shoulder arthroplasty (Eclipse, Arthrex, Naples, FL, USA) for primary osteoarthritis at a mean follow-up of 24 months. From January 2010 to December 2014, 18 patients underwent 20 stemless shoulder arthroplasties. In all cases, we implanted the Eclipse prosthesis (Arthrex, Naples, FL, USA) and a cemented polyethylene glenoid with keeled design. Patients were followed at 3, 12 and 24 months. The main outcomes were functional results. The Constant-Murley score improved from 35 to 68 points (p<0.05, Wilcoxon test), which represents an increase of 41 to 80% (p<0.05, Wilcoxon test) for the age- and sex-adjusted scores within twelve months. The DASH improved from 57 to 28 points. This study shows that the Eclipse prosthesis provides consistent functional and radiological results compared to other stemless prostheses, as well as stemmed shoulder arthroplasty for primary osteoarthritis. Subject to further investigations, stemless prostheses can be considered as an alternative to modern stemmed prostheses in patients with osteoarthritis.