Refers to the medical field or practice of dentistry, including diagnosis, treatment, and prevention of oral diseases.
He went to university to study dentistry.
歯科 is a more common, general term for dentistry or a dental clinic, while 歯科医術 specifically emphasizes the medical techniques and practice of dentistry.
歯学 is often used in academic contexts (e.g., 歯学部), whereas 歯科医術 can sound slightly more clinical or practical.
Compound of 歯科 (dental department) and 医術 (medical art). The exact historical derivation is uncertain, but the term is a straightforward Sino-Japanese formation.