Abstract
We report seven cases of knot impingement and acromial erosion associated with rotator cuff repair. Between June 2007 and April 2009, we operated on 73 cases of rotator cuff tear using a suture anchor with the double row technique (Twin Fix, Fastin RC and Panalok Loop RC). Among 48 patients who underwent 3D-CT, 33 (68.8%) were found to have acromial erosion due to knot impingement. We operated again on 7 patients (1 man and 7 women) with a mean age of 66.2 years (range 49 to 76 years). With regard to size, the rotator cuff tears comprised one on the bursal side, 2 small tears, 3 medium tears and one large tear. Four cases were not associated with pain and had almost a full range of motion, and 3 cases were associated with some pain and contracture. A knot of thread projected from rotator cuff and the acromion were scraped off the surface with the image of the arhroscope. All threads and knots projected from rotator cuff were removed. After surgery, 3 patients who had pain and contracture showed an improved range of motion and reduced pain.
