Sachin C Sarode1, Gargi S Sarode2. 1. Professor, Department of Oral Pathology and Microbiology, Dr. D. Y. Patil Dental College and Hospital, Pimpri, India. Electronic address: drsachinsarode@gmail.com. 2. Associate Professor, Department of Oral Pathology and Microbiology, Dr. D. Y. Patil Dental College and Hospital, Pimpri, India.