Definition

Dentin

The layer beneath enamel, naturally yellower and more opaque. As enamel thins with age or erosion, more dentin shows through — one reason teeth look yellower that whitening can only partly change.

Why teeth look yellow

Related terms

Measure it on your own smile

One photo gives you a whiteness score, a VITA shade match and a visible stain estimate — the vocabulary in this glossary, applied to your teeth.