Arthroscopic Surgery and Platelet Rich Plasma In Rotator Cuff Tear Evaluation

Inclusion Criteria: * Men or women who are between 18 and 70 years of age. * Primary, traumatic or degenerative rotator cuff tears measuring 3 cm or less. * Rotator cuff tears requiring arthroscopic repair within 18 months of initial diagnosis. * Provision of informed consent. Exclusion Criteria: * Rotator cuff tears secondary to a fracture. * Patients with an associated dislocation at the time of randomization. * Rotator cuff tears that underwent prior surgical repair or revision arthroscopy. * Non-surgical rotator cuff associated treatment in the 1 month prior to randomization including corticosteroid injection and anti-inflammatory treatment. * Prior platelet rich plasma injection. * Pre-existing conditions associated with upper extremity pain, including arthritis, ongoing infection, carpal tunnel syndrome, cervical neuropathy or other nerve pathology, local malignancy, and systemic disorders (e.g., uncontrolled diabetes, hypothyroidism). * Patients with gross shoulder instability. * Patients with an active infection. * Patients who are pregnant or plan to become pregnant in the next 12 months. * Patients with a pre-operative platelet count less than 125,000 and a pre-operative hemoglobin of 7.5g/dl or less. * Likely problems with follow-up (i.e. patients with no fixed address, report a plan to move out of town, or intellectually challenged patients without adequate family support). * Patients who do not read and speak English. * Patients participating in another ongoing trial that would interfere with the assessment of the primary or secondary outcomes. * Any other reason (in the judgment of the surgeon).