The ortho surgeon said he did a distal clavicle resection with a interpositional arthroplasty. He also later called it an acromioplasty. The report shows that he removed .5cm off the distal end of the clavicle, then "an interposition arthroplasty was made with the joint capsule....the joint capsule, pediculated at the distal end of the clavicle, is sutured at the inferior part of the acromion." I thought an acromioplasty was removing part of the acromion???