Arthroscopic Rotator Cuff Repair With Multimodal Analgesia(MMA)

* The purpose of this study is to compare the efficacy of periarticular injections consisting of ropivacaine, morphine, epinephrine, cefotetan, and hyaluronic acid with the efficacy of periarticular injections consisting of the same amount of placebo(isotonic saline) during arthroscopic rotator cuff repair. * Adding of multimodal analgesia(MMA) to conventional rotator cuff repair, it was expected that could reduce postoperative pain and narcotic consumption.