Abstract
Purpose
When the proximal humeral anatomy is altered because of malunion, shoulder arthroplasty is a challenge for the orthopaedic surgeon, and tuberosity osteotomy should be avoided whenever possible. The purpose of this study was to investigate the clinical and radiological outcomes of anatomic stemless shoulder arthroplasty in cases of malunion. We hypothesized that a stemless prosthesis can be implanted without performing tuberosity osteotomy.
Methods
We conducted a continuous, single surgeon, retrospective case series study with a minimum follow-up of two years (mean of 44 months, range 24–80). The Constant-Murley score, active range of motion and X-rays were evaluated in 27 patients (mean age of 60 years, range 37–83) with proximal humeral malunion who were treated with a stemless anatomic shoulder prosthesis.
Results
In all patients, the prosthesis was implanted without the need for tuberosity osteotomy. The Constant score improved from 27 to 62 (p ≤ 0.001), active anterior elevation from 81° to 129° (p ≤ 0.001), and external rotation from 5° to 40° (p ≤ 0.001). There was no evidence of radiological loosening.
Conclusions
Use of a stemless anatomic shoulder prosthesis avoids the need for tuberosity osteotomy and certain surgical difficulties, even in cases of severe tuberosity malunion, and leads to good functional outcomes in the short term.
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Acknowledgments
Lucie Pautet, Ph.D., from The Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), is acknowledged for technical help.
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Not applicable. French law does not provide for consultation of an ethics committee for non-interventional biomedical research (Article L1121-1 of the Code of Public Health).
Conflict of interest
Richard Ballas and Philippe Teissier have no competing interests to declare. Dr Jacques Teissier received Royalties and Personal Fees from Biomet Compagny, Warsaw, Indiana, which is related to the subject of this work.
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Ballas, R., Teissier, P. & Teissier, J. Stemless shoulder prosthesis for treatment of proximal humeral malunion does not require tuberosity osteotomy. International Orthopaedics (SICOT) 40, 1473–1479 (2016). https://doi.org/10.1007/s00264-016-3138-y
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DOI: https://doi.org/10.1007/s00264-016-3138-y