General term for teeth. Often used in the set phrase 歯牙にもかけない (to not care at all; to ignore).
He paid no attention to my advice.
teeth and tusks
Rare literary or historical usage referring to teeth and tusks collectively, especially of animals.
In old documents, there are descriptions of elephant teeth and tusks.
odontoma
dental disease
orthodontia; orthodontics
Compound of 歯 (tooth) and 牙 (tusk, fang). The exact historical derivation is uncertain, but the word has been used in classical Japanese to refer to teeth and tusks.