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Oral Submucous Fibrosis (OSMF) is premalignant condition having high malignant transformation rate and increased risk of oral squamous cell carcinoma which itself accounts for 40% deaths due to malignancy across the world. Objective: To study the prevalence of OSMF among betel nut chewers in north Indian population. Methods: A total of 320 subjects consisting of 246 males and 74 females Dental patients of Patna were selected. The subjects were divided into two groups. The first group wasdoi:10.7324/ijcrr.2017.91311 fatcat:szbax4rrlbfdrg3p56xy5ept5a