He is conducting research on the radula of mollusks.

He died young.

He is dedicated to the study of the dentary bone.

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.

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

The three friends of winter are planted in his garden.

If you don't get regular dental check-ups, you may develop periodontitis.

If you don't have regular dental check-ups, you may develop periodontitis.

The saber-toothed tiger is a type of extinct mammal.