Introduction: On the anterolateral aspect of mandible, mental foramen is found which transmits mental nerve and vessels.It is the ending of mandibular canal which gives passage for inferior alveolar nerve and vessels. The commonly used injection for anaesthetising the mandibular teeth is the inferior alveolar nerve block. Materials & Methods: During osteology demonstrations, we observed accessory mental foramen in 9 (nine) mandibles with varying location with reference to mental foramen’s location. We have conducted study on 35 mandibles. Results: We observed accessory mandibular foramen above mental foramen in 3 (three) mandibles and behind mental foramen in 6 (six) mandibles. To anesthetise anterior teeth, the possible way is to introduce anaesthesia besides mental foramen.