Effect of a Posterior Shoulder Pillow on Pain and Sleep Quality After Rotator Cuff Repair

Brief Summary

The goal of this clinical study is to learn if using a special pillow placed behind the shoulder can help to reduce pain and improve sleep for patients after surgery to repair a torn rotator cuff. The main questions it aims to answer are: * Do patients who choose to use the posterior shoulder pillow have lower pain levels after surgery? * Do these patients report better sleep quality during recovery? * How safe and comfortable is the pillow for patients to use? Researchers will compare patients who use the pillow to those who do not use it to see if there is a difference in their recovery. Participants will: * Be asked about their willingness to use the pillow. Their treatment and recovery plan will be decided together with their doctor. * Be asked to rate their pain and sleep quality several times after surgery: at 1 week, 2 weeks, 4 weeks, and 6 weeks. * Have their shoulder function assessed by a clinician at 2, 4, and 6 weeks after surgery. * Receive a standard MRI scan before and 6 weeks after surgery as part of their regular medical care to check on healing.