Inflammatory papillary hyperplasia of gingiva as a manifestation of allergic contact stomatitis caused by amalgam core preparation

Allergic contact stomatitis is a rare disorder of oral mucosa. it is less common in oral cavity when compared to skin. the diagnosis of allergic contact stomatitis is a clinical challenge. this condition may exhibit several clinical appearances that can mimic other oral mucosal lesions. thus the differential diagnosis from specific oral mucosal diseases is important in management. this report presents the first case of papillary hyperplasia of gingiva that is a manifestation of allergic contact stomatitis caused by mercury which was released from old amalgam restoration during preparation for core built up for dental crown.