Tooth-colored crowns can be made of porcelain and metal to provide strength and aesthetics. But with the new technology available today, they can be made entirely of porcelain shaded materials for an even more aesthetic appearance.
To have enough strength to withstand biting forces, porcelain crowns are often built upon a metal core. New breakthroughs in materials and stronger porcelains now make it possible to make crowns entirely out of porcelain colored material using a zirconia based framework.
Zirconia crowns maintain a translucency that makes them hard to tell from natural teeth. Without the darker metal underneath, the problem of the dark blue line at the edge of the gums is eliminated. This allows your dentist to place the edge of the crown above the gum line, which is healthier for your tooth and gums.
When you want to improve your smile, porcelain over zirconia crowns are a beautiful and natural-looking choice!