Biomechanics Of Glenoid Component Design

With the continuing success of total shoulder arthroplasty in the treatment of glenohumeral arthrosis, the longevity of implanted glenohumeral components has become a considerable concern. Since glenoid component loosening appears to be the primary long-term mode of failure of shoulder arthroplasty, considerable interest has been focused on the development of alternative glenoid component designs. Interestingly, despite modern technology, glenoid component designs remain remarkably similar to the original Neer design. Various approaches have been taken including altering component geometry, component materials, and implant fixation. However, only time will tell whether the subtle nuances of glenoid component design will alter long-term outcome or whether other factors including diagnosis, soft tissue integrity, surgical technique, and rehabilitation will more profoundly affect the longevity of total shoulder arthroplasty.