AI Article Synopsis
- This multicenter study compared clinical outcomes of reverse total shoulder arthroplasty using three types of glenospheres (36-mm CoCrMo, 36-mm eccentric CoCrMo, and 44-mm X-UHMWPE) across 133 patients from 2003 to 2008.
- Results showed significant improvements in the Constant score and pain levels, with group C (44-mm X-UHMWPE) exhibiting superior range of motion and lower rates of scapular notching compared to the others.
- Overall, all groups had good outcomes, but groups C and A outperformed others in recovery and complications, indicating the need for further long-term research on survivorship.
Article Abstract
Background: The aim of this multicentre retrospective study was to compare reverse total shoulder arthroplasty clinical outcomes with glenospheres of different diameters, designs and materials.
Methods: Between 2003 and 2008, 133 patients were divided into three groups: 60 (45%) with 36-mm standard CoCrMo (group A), 21 (16%) with 36-mm eccentric cobalt-chromium-molybdenum (CoCrMo) (group B) and 52 (39%) with 44-mm cross-linked ultra-high molecular weight polyethylene (X-UHMWPE) (group C) glenospheres. Mean (SD) follow-up was 38.7 (17.4) months. Clinical evaluation included Constant score and range of motion. Radiographic analysis included radiolucent lines, instability, loosening and assessment of scapular notching.
Results: Mean Constant score significantly increased for all groups (Wilcoxon test, p < 0.001). Group C allowed a higher and stable increase in range of motion. After 12 months and 24 months, groups C and B showed less pain than group A (Mann-Whitney U-test, p < 0.05). Group C had significantly lower scapular notching than group B (Mann-Whitney U-test, p = 0.001) and A (Mann-Whitney U-test, p = 0.009) at 12 months, 24 months and 36 months. Groups A and C presented 5 (8.3%) and 4 (7.6%) early complications, respectively.
Conclusions: The present study reported good results for all groups, although groups C and A presented better clinical outcomes, significantly lower notching and instability. A 44-mm X-UHMWPE glenosphere allowed a faster and more stable functional recovery, despite poorest pre-operative conditions. Additional long-term studies are needed to evaluate survivorship.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4935062 | PMC |
| http://dx.doi.org/10.1177/1758573214535574 | DOI Listing |
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