Oral submucous fibrosis(OSMF) is well recognized as one of the most common potentially malignant condition of the oral mucosa in India related to chewing of arecanut products and characterized by mucosal rigidity of varying intensity caused by fibroelastic changes of the juxta-epithelial layer, resulting in a progressive inability to open the mouth. The present study aimed to measure submucosal thickness by high frequency ultrasonography (USG) transcutaneously...