M Hari Kumar1, M Siva Kumar2, Vishalakshi Siva Kumar2, Sabitha Hari Kumar3. 1. Department of Oral Medicine and Oral Radiology, Rajas Dental College and Hospital, Tirunelvelli, Tamil Nadu, India. 2. Maxillo Facial, Doctor Kamalkanadasan Dental Clinic, Chennai, Tamil Nadu, India. 3. Dental Department, Jeba Dental Clinic, Chennai, Tamil Nadu, India.