In the past decade, interest in and experience with shoulder arthroplasty has been increasing. This article reviews recent advances in our understanding of normal shoulder anatomy and biomechanics and their application to shoulder arthroplasty. These advances, coupled with our knowledge of pathologic shoulder conditions, have led to more rational approaches to treatment. The role of shoulder arthroplasty has expanded as a result of these advances, and shoulder arthroplasty will continue to improve quality of life for increasing numbers of patients.
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