Abstract
Introduction: Lichenoid changes are pathological reactions that are characterized as an immune response to an allergen agent such as restorative materials, systemic medications or foods. may present on the skin and oral mucosa. Case detailing: The aim of the present study is to report the clinical case of a patient, 41,CMS, years old diagnosed with oral lichenoid reaction associated with dental amalgam restorations and the conduct used to treat this change. The complementary exam of choice is the incisional biopsy, but it was chosen to replace the amalgam restoration to see if there was regression of the lesion, being a less invasive semi-technical maneuver. After the period of three months, there was complete regression of the lesion and to date there were no recurrences. Discussion: Because it is a differential diagnosis of other lesions such as lichen planus, accurate clinical examinations are necessary for the correct diagnosis and treatment. Removal of the causative agent leads to significant improvement of the pathological condition.