[Extrusion into the inferior dental canal of filling material. Apropos of 18 cases].

The purpose of this article is to draw the reader's attention to a fairly frequent complication in root treatments with suspicious clinical symptoms and in which painful complications are particularly to be feared. This complication appears therefore to be a stomatological emergency, treatment for which is aimed at bringing about regeneration of the traumatised nerve, prognosis being dependent on prompt surgical measures, the site of the complication and the anatomical damage done to the lower dental nerve.