tartar – commonly used term for dental calculus, hard, rough deposit on teeth that attracts plaque

temporomandibular joint disorder/dysfunction (TMD) – a condition involving pain and tension in the jaw and facial area, may include restricted movement

temporomandibular joint (TMJ) – connecting hinge between lower jaw (mandible) and the base of the skull

treatment plan – set of procedures agreed upon by doctor and patient to address oral health concerns

trench mouth – gum disease involving severe mouth ulcers, loss of tissue, and halitosis