Other variants include a bifid canal with a branch (~41%): following the course of the main mandibular canal before re-joining it (forward or buccolingual type); terminating at the apex of a tooth, usually the molar teeth (dental type); opening as an accessory mental foramen.
Other types include a split channel with a supplementary branch (~41%): running parallel to the main mandibular canal before reconnecting it (forward or buccolingual type); ending at the tip of a tooth, typically the molar teeth (dental type); opening as an auxiliary mental foramen.