[Accessory mandibular canals in the human].

Besides the persisting mandibular canal accessory ducts pass through the bony lower jaw in fetuses and children. 2 of the ducts are more constant than others. They are named according to the first authors canals of Serres and Robinson. By histological and macroscopical methods and by X-ray technique we studied these ducts during development in human fetuses and children and counted their occurrence in the adult.