Crowns are used to fully cover a tooth that is weak or too decayed to be fully restored with a filling. This is generally done following a root canal treatment or when a large filling wears out. A weakened tooth is at risk of breaking or cracking, which is a serious matter and much more difficult to treat. Crowns ride over the weakened tooth, restoring strength and protecting the tooth from additional damage that can be caused by normal biting and chewing. Using Cerec 3D CAD/CAM imaging, our office can prepare and deliver a crown the same day.