My tooth fell out.

我的牙掉了。

youdao

It's not my tooth.

这不是我的牙。

youdao

I lost my tooth.

我的牙齿掉了。

youdao

When you've got the toothache, all you're thinking about is 'Wow, my tooth really hurts.

CNN: Finding words for 'The King's Speech' took decades

"Your honor, last night I bit down on something, and I have an abscess in my tooth, " Muhammad said, according to the court transcript.

CNN: Muhammad blames toothache for lawyer switch

I'm going to fight tooth and nail to keep my job as mayor.

BBC: Toronto Mayor Rob Ford ordered to step down