Thus, this study consists of three separate aims in order to clinically and biochemically investigate the capabilities of the Healicoil anchor and its efficacy in rotator cuff repair. One, evaluate the bone in growth of the anchor compared to a standard poly-ether ether ketone (PEEK) anchor. Two, analyze the marrow elements that are released into the repair site through the open construct. Three, compare the functional outcomes of patients with rotator cuff repairs using the Healicoil anchor compared to a traditional Twinfix PEEK anchor.