Reverse shoulder arthroplasty current concepts

The reverse shoulder arthroplasty (RSA) was introduced in 1987 for cuff tear arthropathy. Over time the prostheses have evolved and its indications have increased. RSA is a semi-constrained reverse ball and socket prosthesis with several key biomechanical advantages, including a fixed centre of rotation which allows the deltoid to function. In this review, the history, key principles, indications, surgical tips and complications are discussed. RSA can provide excellent results with significant improvements in pain and function but is a technically demanding procedure.