Oral submucous fibrosis is a chronic progressive premalignant condition, characterized by gradually increasing fibrosis of sub mucosa of cheek resulting in trismus thereby limiting mouth opening. Various surgical modalities have been tried in surgical management, but each has its own limitations. Buccal fat pad and collagen membrane has seen satisfactory results. In the present study these two grafting materials have been compared and assessed their roles in improving the mouth opening post operatively. The study group consisted of 15x2=30 patients with bilateral clinically and...