Glossary of Dental Health Terms
underbite: when the lower jaw protrudes forward causing the lower jaw and teeth to extend out beyond the upper teeth.
unerupted tooth: a tooth that has not pushed through the gum and assumed its correct position in the dental arch.
veneer: a thin, custom-made shell of tooth-colored plastic or porcelain that is bonded directly to the front side of natural teeth to improve their appearance -- for example, to replace lost tooth structure, close spaces, straighten teeth, or change color and/or shape.
wisdom teeth: third (last) molars that usually erupt at age 18-25.
xerostomia: dry mouth or decrease in the production of saliva.
X-rays: high frequency light (or radiation) that penetrates different substances with different rates and absorption. In dentistry, there are typically four types of X-rays: periapical, bite-wing, occlusal, and panoramic.