If you have a tooth that has broken down due to decay or you have a large metal filling that needs to be replaced. A white crown can be used to restore that tooth back to its prominence. White crowns provide strength and a natural appearance where little tooth structure remains. In addition, white crowns can be used to cover space where a tooth has been lost. By fusing porcelain together crowns form what is called a bridge and bring a natural appearance to that space.
Crowns are excellent restorations and have few disadvantages. They are highly durable, but they will eventually need to be re-cemented or replaced due to normal wear.