He smiled, showing his lower teeth.

In the Edo period, women blackened their teeth as a symbol of beauty.

If you don't brush your teeth every day, dental plaque can accumulate and potentially cause cavities.

While waiting for the test results, he gritted his teeth.

He died young.

He is dedicated to the study of the dentary bone.

My toothache is very painful.

The tooth of the zipper on my jacket broke.

My gums hurt.

His teeth have strong dentin, making them less prone to cavities.