Rotator Cuff Repair Using Standard Double Row Technique With Platelet Rich Fibrin Membrane vs. Standard Double Row Technique

Inclusion Criteria: * Evidence of a rotator cuff tear as determined by clinical examination and diagnostic imaging (MRI) * Patient undergoes arthroscopic rotator cuff repair * Age 18 or older Exclusion Criteria: Pre-operative exclusion criteria * Patient has had a previous arthroscopic rotator cut repair * A previous diagnosis of Rheumatoid Arthritis * Evidence of major joint trauma, infection, avascular necrosis, chronic dislocation, inflammatory or degenerative glenohumeral arthropathy, frozen shoulder, or previous surgery of the affected shoulder, * Evidence of significant rotator cuff arthropathy with superior humeral translation and acromial erosion diagnosed by x-ray or other investigations, * Medical device that would exclude the patient from having a MRI, including a pacemaker, cardiac defibrillator, aneurysm clips, carotid artery clamp, neurostimulator, insulin or infusion pump, implanted drug infusion device, bone growth/fusion stimulator, or ear implant. * Major medical illness (life expectancy less then 2 years or unacceptably high operative risk), * Inability to speak or read English * Psychiatric illness that precludes informed consent. * Pregnant patients. * Age 17 or younger * Unwillingness to be followed for 2 years. * Bilateral Rotator cuff tear confirmed by clinical exam and MRI * Patients enrolled in the study who demonstrate retear on clinical exam and MRI, then elect for a repeat surgery. Intra-operative exclusion criteria (Note: This information will be collected during the chart audit and patients will be excluded from the study at that time.) * Irreparable cuff tears or tears extending into the subscapularis or teres minor * Isolated teres minor or subscapularis tears. * Inelastic and immobile tendon which cannot be advanced to articular margin