鏡視下腱板縫合術の術後成績良好な外転筋力を得られる術後MRI修復所見とは？

概要

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The purpose of this study was to elucidate what kind of healing condition of rotator cuff tears (RCTs) assessed by MRI provides good shoulder strength postoperatively. 52 patients with RCTs, who underwent cuff repair, were assessed their healing condition by MRI at the 6-12 months of operation and their shoulder muscle strengths (abduction strengths at 45 and 90 degree abduction, and internal and external rotation strengths at adduction and neutral position) were measured at the follow-up by the digital hand dynamometer. The ratio of muscle strength of the operated and healthy shoulders was calculated and used for evaluation. The average age at operation was 65 years old (26-79) and the average follow-up period was 18 months (12-30). The thickness of repaired tendon and the size of re-tear were evaluated by MRI. The influence of repair condition on the shoulder strength ratio was analyzed. There were no statistical differences between the muscle strength ratio of a well repaired tendon and that of a thin repaired tendon and the tendon with size of re-tear less than 2mm. The significant weakness was seen in the 45 and 90 degree abduction strength ratio of the tendon with a re-tear of over 2mm. The shoulders with cuff a re-tear of over 2mm assessed by MRI after the operation showed poor abduction strength.
日本肩関節学会の論文