There are either metal or metal free crowns.
Metal Crowns have a core of metal onto which a tooth coloured porcelain is fired. These crowns typically are held in place by a slight taper in the preparation design, and a cement. Preparations of these types of crowns mean tooth structure is removed all the way to the gum margin that sometimes results in the strongest part of the tooth been weakened. | Metal Free Crowns are made up of porcelain (IPS e.max Ceram) IPS e.max is a ceramic material which combines strength and beauty unlike any other dental restorative. With the new bonding systems available, porcelain can be reliably bonded to the tooth structure, allowing a more conservative approach to preparing the crown without having to cut down to the gum level. These types of crowns are also known as overlays - and your dentist may use these two terms interchangeably - crown/overlay. |