Clinically Diagnosed Oral Lichen Planus Improved after Removal of Dental Alloys: Report of a Case

Abstract

A 22-year-old female with a white lesion on the left side of the tongue is reported. This lesion was diagnosed as oral lichen planus, clinically and pathologically. In the patient's oral cavity, positive metal against patch test was detected by metal analysis of dental alloys. A topical steroid was ineffective; however, after the removal of dental alloys, the lesion disappeared. These findings strongly suggested that a dental alloy metal allergy led to the lesion.