Abstract
ObjectiveTo study the anatomical relationship between acromial morphology documented on X- rays and rotator cuff (RC) tears evaluated using arthroscopy. HypothesisThere is a positive correlation as regards acromial morphology and RC tears. MethodsA retrospective, case control series of 279 consecutives cases, who underwent arthroscopic surgery were included in this study; cases were separated into 2 cohorts; one group with complete RC tears (N=155) and a control group treated for glenohumeral instability (N=124) with indemnity of the RC confirmed during arthroscopy. Pre-operative acromial anatomy was documented with X- rays – true anteroposterior and sub-acromial outlet views – measuring the acromial slope according to Bigliani (B), acromial tilt according to Kitay (K), and acromial index according to Nyffeler (AI). ResultsThe differences in the mean values of B and K between groups were not significant (P=.6 and P=.3). There was no correlation between B and AI (r= 0.05; P=.3). A positive correlation was observed between the acromial tilt (r= 0.2; P=.008) and acromial slope (r= 0.1; P=.03). A significant difference was found regarding AI, with greater values in the case group (P=.01). ConclusionIn this study, the acromial slope according to Bigliani, and acromial tilt according to Kitay, does not correlate with RC tears. A positive correlation of the AI with RC tears was observed.
Published Version
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