抄録
Delamination is 1 of the horizontal tears combined with articular side tears and bursal side tears observed in full-thickness rotator cuff tears. Double row rotator cuff repair is the current arthroscopic surgical technique for rotator cuff tears with delamination. We reported that bursal side rotator cuff was well repaired, though articular side retear was seen in 50% after double row repair for delamination at the 34th JSS meeting. The aim of this study was to evaluate the relevance between articular side rotator cuff retear and preoperative rotator cuff tear size. We retrospectively evaluated 22 shoulders in which we performed preoperative MR arthrography and arthroscopic double row repair for delamination type rotator cuff tears. Postoperative MRI was performed at 8.0 months postoperatively on average. Patients were classified into retear group (11 shoulders) and well-repaired group (11 shoulders) according to the repair integrity of articular side rotator cuff. We measured tear sizes of articular and bursal side with preoperative MR arthrography images and evaluated the relevance to articular side rotator cuff retear. Preoperative articular side rotator cuff tear size was 2.79 ± 0.47 cm in retear group and 3.29 ± 0.89 cm in well-repaired group. Preoperative bursal side rotator cuff tear size was 2.22 ± 0.95 cm in retear group and 2.27 ± 1.13 cm in well-repaired group. Neither of them were significant differently. There was no relevance between preoperative rotator cuff tear size and prognosis of articular side rotator cuff after arthroscopic double row repair for delamination.
