Photomicrographs of rabbit oral mucosa for immunohistochemical examination of TNF-α. C1: Heavy expression of TNF-α (arrows) in control group compared to (T1) treatment group at one-day interval reveals heavy infiltration of inflammatory cells. C3: TNF-α also continue to express in control group, while reduced in treatment group (arrows) (T3) at three-day interval. C7&T7: Control and treatment group at seven-day interval, showed remission of TNF-α in (T3) in contrast to (arrows) (C7) control group (arrow). C10: Control group appeared slightly expression of TNF-α (arrows) compared to completely absence of TNF-α in (T10) treatment group at 10-day interval. 100×.