IRCT201109197594N1 IRCT 2012-09-04 Tehran University of Medical Sciences comparison the efficacy of bovine colostrum with topical triamcinolone acetonide 0/1% Comparison the efficacy of bovine colostrum with topical triamcinolone acetonide 0/1% in the treatment of erosive oral lichen planus. 2012-10-21 anticipated 40 Complete https://irct.ir/trial/8083 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. 2 oral lichen planus. Intervention 1: Intervention group: Five ml of pasteurized bovine colostrum under standard conditions between patients in the distribution of sterile vial and instructions for its use, both in writing and orally to patients placed.(4 times a day and each time for 2 min, 5 ml in the mouth gargle). Meanwhile, 10 minutes after taking drug,avoid the eating and drinking, and brushing.All patients refer again after two weeks and four weeks after treatment to evaluate the lesion and to complete the final questionnaire. Intervention 2: control group: This group of patients treated with triamcinolone acetonide is also called the drug four times daily for 4 weeks and the lesion can be localized.Meanwhile, 10 minutes after taking drug,avoid the eating and drinking, and brushing.All patients refer again after two weeks and four weeks after treatment to evaluate the lesion and to complete the final questionnaire.