A Histopathological section of oral mucosal wound at day 1. A,B; for control group showed thickening of mucosal tissue at the edges of the wound with numerous blood cells filled the mucosal defect. C,D; sections of treated group with neo-orabase paste demonstrated thickening of the mucosa next to the wound edge and the oral mucosal epithelium extended into the wound cavity with fibrin strands and numerous inflammatory cells were seen in the submucosal wound. The mucosal layer indicated by solid arrow, the inflammatory and blood cells by open arrow, the fibrin strands by open triangle. H& E, ×100 & ×400.