Abstract
BackgroundThe purpose of this study was to compare the functional outcome and radiographic appearance of total shoulder arthroplasties (TSAs) performed with an entirely cemented all-polyethylene glenoid to a hybrid all-polyethylene glenoid designed for hybrid fixation with peripheral cement and central osseous integration. The hypothesis was that there would be no difference in functional outcome or radiographic appearance between the two components at two year follow-up. MethodsA multicenter retrospective comparative study was conducted on primary TSAs performed with a press-fit humeral stem and an entirely cemented or hybrid all-polyethylene glenoid from 2015–2017. Functional outcomes and radiographic appearance of the glenoid based on the Lazarus and Churchill classifications were reviewed at a minimum of 2 years postoperatively. Results96 patients were included in the study; 62 with a hybrid all-polyethylene glenoid and 34 with an entirely cemented pegged glenoid. The mean Lazarus score was 1.03 in the cemented group compared to 0.60 in the hybrid group (p = 0.032). The mean Churchill score in the hybrid group was 0.47, which was also significantly lower than the cemented group Lazarus score (p = 0.006). There were no statistically significant differences in 2-year functional outcomes, range of motion, complications, or revision between the two groups. ConclusionA hybrid all-polyethylene glenoid for TSA results in lower radiolucencies scores at 2 years postoperatively compared to an entirely cemented, pegged component. There were no differences in functional outcome scores or range of motion between patients with the two glenoid types at 2 years. Level of evidenceLevel III; Retrospective Comparative Study.
Published Version
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