faculty of dentistry; dental school
Refers to the organizational unit within a university that teaches and researches dentistry. Equivalent to a college or school of dentistry.
He is majoring in oral surgery at the dental school.
This university's faculty of dentistry is nationally famous.
歯科 refers to the field of dentistry or a dental clinic, whereas 歯学部 is the academic faculty within a university.
Compound of 歯 (tooth) + 学 (study, learning) + 部 (department, faculty). The reading しがくぶ follows standard on'yomi.