Squamous cell carcinoma comprises of 90 to 95% of all oral malignancies. In this section we shall use the term Oral Cancer (OC) to be synonymous with squamous cell carcinoma. In International Classification of diseases by WHO 1977 Oral cancer is denoted with ICD 140-Lip, 141-Tongue, 143-Gingiva and alveolar ridge; 144-Floor of mouth and 145-Other parts. In all centers in India we follow these recommendations meticulously. Incidence of OC in Asia ranges from 1.6 in Japan to 13.5 in India (Waterhouse et al). In the Manipuri District of India annual incidence rate of 21.4/100, 000 has been determined by Wahi et al. Apart from being the guardian of dental health of the patient, it is the dentist’s duty to keep a sharp eye for the premalignant lesions and conditions. He also plays a stellar role in the education of the patient in the ill effects of tobacco, raw alcohol and chewing of betel leaf, betel nut in various combinations including the smokeless and the snuff variety. The effective management of an oral cancer case depends on the three factors “Three-link theory”.