Effect of the critical shoulder angle on severe cranialization following total shoulder arthroplasty.

Wolf, Matthias; Bülhoff, Matthias; Raiss, Patric; Zeifang, Felix; Maier, Michael W · J Orthop · 2020

retrospective_cohort · Level III

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Abstract

This study assesses the relationship of CSA, cranialization and radiographic glenoid loosening following TSA in the long-term follow-up. 26 shoulders with TSA were examined radiographically postoperatively and after a mean 12.6 years. Severe cranialization was defined as direct humeral contact with the acromion and/or acetabularization of the acromion. A CSA ≥35° was associated with severe cranialization. Glenoid loosening was present in 6/24 shoulders (25%). Severe cranialization was associated with glenoid loosening (p = 0.003). A postoperative CSA ≥ 35° was associated with severe humeral cranialization after TSA in the long-term follow-up. Severe cranialization correlated with glenoid loosening.Level of evidence IV - retrospective cohort study.

Anatomy