Both crowns and bridges are used to complete a full smile. Dental crowns and bridges are usually made of gold, porcelain, or a combination of both.
The purpose of dental crowns is to stabilize teeth that have been weakened by tooth decay, an injury, or gum disease. Crowns can be used to cover a large filling so that a smaller crown can be placed over it. These are most commonly used on the front teeth, where they are the most visible.