tartar:
    also called calculus, a hard deposit containing bacteria and minerals that adheres to teeth
tmd:
    temperomandibular disorder; term given to condition characterized by facial pain and restricted ability to open/move the jaw
tmj:
    the temporomandibular joint, the point where the lower jaw attaches to the upper jaw
tmj disorder:
    term given to condition characterized by facial pain and restricted ability to open/move the jaw

third-party provider:

    insurance company, union, government agency that pays all or a part of cost of dental treatment
tooth bud:
    early embryonic structure that becomes a tooth
tooth whitening:
    a process to lighten the color of teeth
torus:
    common bony growth on the palate or lower jaw
transplant:
    placing a natural tooth in the empty socket of another tooth
trauma:
    injury caused by a blow, chemicals, temperature extremes, or poor tooth alignment

trench mouth:

    gum disease characterized by severe mouth sores and loss of tissue. See ANUG.