(a) ``Dental services'' means diagnostic, preventive, or corrective procedures provided by or under the supervision of a dentist in the practice of his profession, including treatment of--
(1) The teeth and associated structures of the oral cavity; and
(2) Disease, injury, or impairment that may affect the oral or general health of the beneficiary.
(b) ``Dentist'' means an individual licensed to practice dentistry or dental surgery. [43 FR 45224, Sept. 29, 1978, as amended at 45 FR 24888, Apr. 11, 1980]