齿颚矫正学 /chǐ'è jiǎozhèng xué/ angolul

orthodontics▼(correcting misalignment of teeth)
noun
[UK: ˌɔː.θə.ˈdɒn.tɪks] [US: ˌɔːr.θə.ˈdɑːn.tɪks]