Lateralization and inclination angle in reverse arthroplasty-what do we know?
review · Level V
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- Record sourced from PubMed, PMID 39545010.
- Also identified by DOI 10.1177/17585732241281910 and PMC identifier 11559928.
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Abstract
Since the original Grammont design of a reverse shoulder arthroplasty there has been a trend to decrease inclination angle from 155° to 145 or 135°. Furthermore, lateralization on the glenoid side has been advocated. These changes decrease the risk for impingement between humerus and the inferior part of the glenoid (notching). These changes were also made to improve restoration of rotation. However, there is very little evidence that rotation has improved due to these changes. A negative effect of lateralization is that it increases the risk for glenoid loosening. Furthermore, the stress on acromion increases which may lead to more acromion or scapula spine fractures. More randomized studies are needed to define optimal design of a reverse shoulder arthroplasty.