Scaffold Implant for Rotator Cuff Lesions Encountered on the Supraspinatus Tendon

This study is testing whether placing a thin collagen scaffold (a supportive patch made from natural material) during shoulder surgery helps to thicken and repair a damaged rotator cuff tendon better than surgery alone. The rotator cuff is a group of tendons that holds the shoulder together. Partial tears are common and can cause ongoing pain. MRI scans will be used to measure tendon thickness before and after surgery. You may be eligible if: - You are between 40 and 65 years old - You have chronic shoulder pain lasting more than 3 months - Your pain has not improved with medications or other treatments - You need surgery for a partial or small full-thickness tear of your shoulder tendon You may NOT be eligible if: - You have shoulder instability or significant cartilage damage - You have previously had rotator cuff surgery on the same shoulder - You have diabetes requiring insulin, an autoimmune disorder, or an immune deficiency - You are pregnant or planning to become pregnant - You are a heavy smoker (more than 20 cigarettes per day) - You have a known allergy to bovine (cow-derived) materials Talk to your doctor about whether this trial might be right for you.