Mental foramen
The mental foramen is one of two foramina located on the anterior surface of the mandible. It transmits the terminal branches of the inferior alveolar nerve and vessels. The mental foramen descends slightly in toothless individuals.Variations
The most frequent position of the mental foramen is in line with the longitudinal axis of the 2nd premolar tooth and generally lies at the level of the vestibular fornix and about a finger's breadth above the inferior border of the mandible. Multiple mental foramina are observed in 17% of the sides. Only of the mandibles show bilateral multiple mental foramina. The majority of the multiple foramina are unequal in size: a single large foramen while the others are small foramina. An incisive mental foramen is observed in 1% of the sides.
