Surgeons want to know how the postoperative position of the humerus in relation to the scapula relates to the clinical outcome after reverse total shoulder arthroplasty (RSA).
The authors of The lateralization and distalization shoulder angles are important determinants of clinical outcomes in reverse shoulder arthroplasty studied these relationships in 46 The following measurements were taken to determine the lateralization (LSA) of the shoulder and the distalization (DSA) of the shoulder in patients who had RSA due to cuff tear arthropathy. Four different implant combinations are included.
Although they found positive correlations between the LSA and the ADLER score and the Constant score, they found no significant correlations between the LSA and ASES, SST, or SSV scores.
They found that while there were negative correlations found between the DSA score and the ADLER, there was no correlation between the DSA score and the Constant total, ASES, SST or SSV scores.
More recently the authors of Lateralization and distalization shoulder angles do not predict outcome in reverse shoulder arthroplasty for cuff tear arthropathy reviewed a larger series of 630 primary RSAs for patients with CTA. Five different implants have been used. The regression…