吸収性アンカーを用いた鏡視下腱板修復術後のアンカー孔の拡大

概要

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Several studies have reported complications of bioabsorbable anchors including the enlargement of anchor holes. The prevalence of the enlargement of anchor holes and its effects on clinical outcomes were evaluated retrospectively after arthroscopic rotator cuff repair with bioabsorbable suture anchors. Sixty shoulders from 58 patients with a mean age of 65.7 years old were included in this study. There were 5 small, 33 medium, 20 large, and 2 massive tears. CT scan was performed at 3 months postoperatively and MRI at 6 and 12 months postoperatively for all patients. The JOA score was significantly improved from 68.9 points preoperatively to 94.9 points postoperatively. Anchor hole enlargement was noted in 5 anchor holes (3.2%) from 4 patients with ST scan at 3 months after surgery, however, all of these enlargements were not aggravated until the latest follow-up. Postoperative MRIs showed 17type I, 29type II, 2type III, 5type IV, and 7 type V. Total re-tear rate was 20.0%. All enlargements were noted in patients with type I or II and did not affect the final outcomes. Micromotion of the anchors due to poor initial fixation may cause the enlargement of anchor holes.