Sometimes to repair teeth, more than just a filling may be needed. Some teeth may need a crown(s) placed to properly restore them. Crowns may be necessary for a variety of reasons. These may include fractured or cracked teeth, large decay which cannot be properly restored with a filling, or a previous root canal-ed tooth which needs to be protected. Sometimes it is necessary to replace missing teeth with a multi-crown bridge or implant(s). Crowns and bridges can be made from a variety of materials from porcelain to ceramics to gold depending on ones preference or situation.