When a tooth has a larger cavity or a crack a crown can be placed over the tooth to strengthen and protect the remaining tooth structure. Crowns are also necessary on back teeth after the tooth has had a root canal; this is because the remaining tooth structure is not as strong therefore a crown is needed to protect the tooth.
In Office "One-visit" Crowns
CEREC technology allows the dentist to make beautiful, natural looking, ceramic crowns for you in just one visit. A digital picture is taken of your existing tooth, and then tooth is prepared for the crown. Instead of taking an impression, another digital picture is taken. The dentist then designs the crown, with special software on the CEREC computer and sends the data to the CEREC milling unit, which makes the crown. Once the crown has been milled, the dentist will try it in, check the fit, polish the crown, bond it on to your tooth and then adjust your bite.
Lab Made Crowns
Gold crowns and porcelain fused to metal crowns can still be made at the lab. For these types of crowns the patient must come in for two visits. At the first visit the dentist will prepare the tooth for a crown, take an impression of the tooth and your bite, and place a temporary crown on your tooth. The dentist will send the impression to a dental lab and a lab technician will make your crown. At the second visit the dentist will try in your crown, check the fit, adjust your bite then cement the crown on to your tooth.