malocclusion

Improper alignment of upper and lower jaw or teeth.

mandible

Lower jaw.

mandibular canal

Space within the mandible which 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.