With traditional dental crowns, a patient needs to come in for at least two separate visits, usually spaced out about two to three weeks. At the first appointment, the tooth to be crowned is examined and prepared. The dentist and his/her assistants will take X ray of the tooth itself and the bone surrounding to check for the extent of decay or damage. In some cases, a root canal may have to be done before proceeding with a crown. The next step is to file down the top and sides of the tooth to accommodate the crown. If there is extensive decay and too much tooth has to be removed, the dentist will add filling material to build up the remaining tooth structure. Once the shaping of the tooth structure is finished, an impression is made of that tooth (which will serve as the basis for the new crown), along with the tooth above or below to ensure that the patient’s bite is not affected. The dentist will send off the impressions to a dental lab and place a temporary crown over the tooth at the end of the first appointment this will serve to protect the tooth during the 2-3 weeks it takes for the lab to create the permanent crown. At the second and final visit, the temporary crown is removed and the permanent crown is checked for fit and color. When these checks are finished, the permanent crown is cemented into place, sometimes with the aid of a local anesthetic.
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