Fig. 2

Table of the main causes of cast alloy related with oral galvanism could be divided as dental origins including anatomic anomalies, materials, rehabilitated preparation, dental plaque, and viral or fungal reaction or non-dental origins including general disease, medication, and others such as psychological backgrounds. Dental materials with biological incompatibility, such as bacterial adhesions, toxicity, subtoxic effects, and allergy, were the representative cause of oral galvanism