Anshita Agarwal1, Mala Kamboj2, Balasundari Shreedhar3. 1. Career Post Graduate Institute of Dental Sciences, Lucknow, India. 2. Deptt. of Oral Pathology & Microbiology, Post Graduate Institute of Dental Sciences, Pt. BD Sharma University of Medical Sciences, Rohtak, Haryana, India. 3. Deptt. of Oral Pathology & Microbiology, Career Post Graduate Institute of Dental Science & Hospital, Lucknow, Uttar Pradesh, India.