Total knee arthroplasty (TKA) is a common and effective treatment for severe knee osteoarthritis. As the average age of the population increases in developed countries, the number of TKAs performed is projected to increase to 3.48 million procedures per year by 2030, a 673% increase from 2005. Although TKA is widely accepted as an efficacious form of treatment for severe knee osteoarthritis, the incidence of patient dissatisfaction and postoperative pain cannot be ignored. Genicular nerve RFA has been performed in non-surgical patients with chronic knee osteoarthritis with significant post procedure improvement in pain and functional status. This study is designed to determine the efficacy of preoperative genicular nerve RFA in improving acute and chronic postoperative pain as well as functional status in patients undergoing TKA.