About. Oak Ridge is a mecca for scientific and technological innovations. We take pride in utilizing advanced techniques to provide services for general, pediatric and sports medicine orthopaedic care. OrthoTennessee Oak Ridge offers a comprehensive orthopaedic approach to patient care enabling us to treat a wide range of conditions.Contact & Location‧Cletus J. Mcmahon, Jr., M.D‧About‧Services‧Physicians‧Resources.