A crown is a covering that encases the entire tooth surface, restoring it to its original shape and size. A crown protects and strengthens tooth structure that cannot be restored with fillings or other types of restorations. Although there are several types of crowns, porcelain are the most popular because they resemble your natural teeth. They are highly durable and will last many years. Porcelain crowns are made to match the shape, size, and color of your teeth giving you a natural, long-lasting, beautiful smile.