Michael Amini MD’s research on Shoulder Replacements presented at the American Academy of Orthopaedic Surgeons
The Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS) is the largest orthopaedic meeting in the United States, where the best research on the latest advancements is selected for presentation. Dr. Amini’s research on correct implant sizing in shoulder replacements was selected for presentation.
Typically, every manufacturer has guidelines for how closely the size of the ball (humeral head) and the size of the socket (glenoid) must match so the shoulder works properly. Guidelines usually allow a one- or two-size mismatch. But Dr. Amini’s research showed that when the ball and socket sizes match perfectly, the implants are less likely to loosen, and they are more likely to last longer.
This is a new finding that has not been reported anywhere else. As a result of these findings, we take extra care to size both the ball and the socket appropriately so they match, and we encourage other shoulder surgeons to do the same.