Press-fit vs. cemented humeral stem fixation for reverse shoulder arthroplasty: functional outcomes at a mean follow-up of 9.5 years

BackgroundReverse shoulder arthroplasty (RSA) is a reliable, long-term treatment option for degenerative pathology. However, the functional outcomes degrade around fifth year postoperation, particularly internal and external rotation. Long-term radiographic changes have been reported humeral stem, depending on fixation method.ObjectivesThe primary objective was to compare clinical of RSAs by method—cemented vs. press-fit—after minimum follow-up 5 years. We hypothesized that proximal osteolysis impacts outcomes.Design MethodsOur study compared 2 matched cohorts: 56 with cemented stems press-fit stems. evaluated all patients using Constant-Murley score (CMS) range motion (ROM), which we measured preoperatively at final visit. radiographs from visit look tuberosity resorption, signs stress shielding, periprosthetic radiolucent lines, scapular notching.ResultsAt mean 9.5 years (5-21), regardless method, RSA procedure helped improve CMS active joint ROM postoperatively, except rotation elbow side in group. Shoulder significantly better group anterior elevation (P < .001), abduction = .006), .02) .02). The did not differ between groups. presence resorption or notching had no effect either Osteopenia, more prevalent group, impact outcome.ConclusionThere significant difference groups CMS, although worse This could be attributed frequent this Reverse method. outcomes. Our notching. At outcome. There