Methods: The study will be a randomized trial with the patient and data collector blinded to type of cutting guide used for the surgical procedure. The study will be conducted at one site and enrollment goal is 100 patients. Data collection will be done preoperatively and at 4 wks, 3 months, 6 months, one year and two year. Established instruments, the (Western Ontario and McMaster Universities Osteoarthritis Index) Womac and Oxford Knee Score, will be used. Measurements will be done to evaluate ROM (Range Of Motion) and assess post-op recovery. Surgical data and hospitalization data will be used for analysis of costs. Statistical analysis will be used for comparison of the two groups.