The mandibular foramen is the opening into the mandibular canal. It is located on the medial surface of the ramus of the mandible providing a passage to the inferior alveolar nerve, artery, and vein. The mandibular foramen thus allows these structures to supply the lower jaw, teeth, and part of the chin with blood, nutrients, gas exchange, and sensation. For oral procedures, the dentist or oral surgeon must be aware of the location and size of the mandibular foramen in order to administer a nerve block to numb the teeth and tissues that will be involved. Since a cranial nerve is involved with the mandibular foramen, it’s location must also be known before placing a dental implant to prevent damage to this nerve. The size and placement of the mandibular foramen can differ between patients since factors such as age, skull shape, and facial dimensions can affect its location.