A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

U-V-W-X-Y-Z

UCR:
usual, customary and reasonable fees

Unerupted tooth:
a tooth that has not pushed through the gum and assumed its correct position in the dental arch

Veneer:
plastic or porcelain facing bonded directly to a tooth to improve its appearance. See laminate.

Vertical dimension:
arbitrary space between upper and lower jaws upon closure; may decrease over time due to wear, shifting or damage to the teeth

Wisdom teeth:
third (last) molars that usually erupt at age 18-25 (when "wisdom is attained")

Xerostomia:
dry mouth or decrease in the production of saliva