Cementless Surface Replacement Arthroplasty of the Shoulder—Indications, Techniques, and Results

Cementless surface replacement arthroplasty of the shoulder differs in many aspects from the nonconstrained stemmed shoulder prostheses. The design concept is replacement only of the damaged joint-bearing surfaces and restoration of normal anatomy with minimal bone resection. Surface replacement arthroplasty of the shoulder has been developed during the last 25 years with good initial and long-term results. Its use has increased worldwide, particularly in Europe. The indications are the same as traditional shoulder replacements in degenerative arthritis but they are not to be used in fresh fractures. Surface replacement can either be done as humeral surface arthroplasty (HSA or hemiarthroplasty) or total shoulder replacement. The results of surface replacement hemiarthroplasty are better than those of stemmed hemiarthroplasty.