Inclusion Criteria:  histological diagnosis of OLP non smoker no diabetes melitus no hepatitis  Exclusion Criteria:  diabetes melitus hepatitis occurrence dysplasia in the histopathological specimen; use of lichenoid reaction inducing medication and presence of amalgam fillings nearby the lesions; interventions for OLP in the previous 12 weeks; pregnant or breastfeeding women; proved or suspected hypersensitivity to any of the chemicals used in the treatment