• malocclusion – improper alignment of upper and lower jaw or teeth
• mandible – lower jaw
• mandibular canal – space within the mandible that holds the blood vessels and nerves for the lower jaw and teeth
• mastication – chewing, generally of food
• maxilla – upper jaw
• maxillary sinus – open cavity inside the maxilla
• molar – rearmost teeth, cusped, used for grinding food
• mouthguard – appliance used to protect the mouth and teeth during rigorous activity, such as sports