Crowns cover and strengthen broken or decayed teeth. Crowns look natural and give you a healthy smile. When the size of a filling exceeds a certain proportion of the tooth, it must be replaced with a cap also called a crown. Porcelain crowns look very natural and don’t have a dark metal line. They reflect light with a natural healthy glow. Porcelain crowns can make even the ugliest teeth look like a movie star smile!