Traditionally crowns have been fabricated using a metal core and baking porcelain onto the metal. This type of porcelain crown is still used because it is inexpensive and easy to place.
However, it is not a conservative procedure. It requires removal of the entire perimeter of the tooth. Also, this crown is not esthetic because the metal creates a flat or opaque look.
Often, it has a dark line next to the gum. Today, there are highly esthetic, conservative options that replace only the part of the tooth that is filled or decayed. The newer, all-porcelain restorations mimic the natural tooth in strength and beauty and better preserve the health of the surrounding gum. Gold crowns are still a very good and conservative choice where esthetics is not a concern.
