A type of dental crown that has a cast metal substructure (for strength) covered by layers of tooth-colored porcelain (for aesthetics).
For decades, this was the gold standard. It is strong enough for back molars. However, over time, a "dark line" (the metal edge) often appears at the gumline, which is why many patients now prefer Zirconia (metal-free) crowns.
A crown with a metal heart and a porcelain skin.