PERIODONTICS, IMPLANT SURGERY, LASER PERIODONTAL TREATMENT, COSMETIC GUM SURGERY Dr. Robert Cain is a highly trained and experienced periodontist serving patients in the Hardin Valley area. Our Knoxville office provides advanced care and treatment options for patients suffering from periodontal disease, cosmetic concerns and missing teeth. We are one of few area dentist offices offering IV sedation for your dental treatment. In addition to dental sedation, Dr. Cain the latest digital 3D technology for the best possible patient experience, including more predictable results.