A Crown/Cap is the portion of a tooth above the gum line that is covered by enamel. The artificial cap can be made of porcelain, composite, or metal and is cemented on top of the damaged tooth. Porcelain is the most popular choice because it is tooth colored and resembles your natural teeth. Much like fillings, crowns are highly durable and will last you many years, but they may need to be replaced in the future.
Typical reasons for a crown include: a tooth that has had a root canal, decayed teeth, fractured or large fillings, broken teeth, or for cosmetic enhancement.