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Sodium hypochlorite (NaOCl) is the most commonly used endodontic irrigator during the mechanical chemical preparation of root canals, acting as a tissue solvent. The action of NaOCl may not be restricted, however, to the root canal wall, considering the risk of leakage of the solution to the periapical tissues via the foramen. The purpose of this report is to describe a case of endodontic complication of an upper right lateral incisor (element 12), due to 2.5% NaOCl leakage, with the formation of diffuse edema and emphysema in the face, in order to discuss the cause and clinical conduct in the face of this type of complication. The immediate therapeutic approach, by irrigating the root canal with saline, calcium hydroxide solution and intracanal medication associated with drug prescription, was effective in controlling pain and preventing further complications in this case.

Conduta diante de um acidente por extravasamento de hipoclorito de sódio durante tratamento endodôntico: Relato de caso