The Chinese word for dentist is
牙医

yá yī

Chinese Definition

dentist
1. 牙科医生
Components
牙
1. (anatomy) tooth
拔牙 - to take out a tooth -
我牙疼。 - I have a toothache. -
2. (anatomy) ivory; tusk of elephant
牙雕 - ivory sculpture -
3. screw thread
4. (literary, obsolete) to bite
5. (obsolete) Alternative form of 衙 (government office; yamen)
6. (obsolete) Alternative form of 芽 (to sprout)
7. (Hong Kong Cantonese, Internet slang) (Prefix used in front of the surname or last character of someone’s given name to express familiarity or friendliness.)
8. (historical) broker
医
1. Simplified form of 醫