Placing a dental crown usually requires two visits to the dentist but some clinics can create and place them on the same day. To prepare for a crown placement, your dentist will numb the area around the tooth so that they can shape the tooth surfaces in order to accommodate the new crown. Extremely damaged teeth may need special techniques to build them up so that they can hold a crown securely. Tooth impressions are taken to ensures that the crown fits properly and also that the colour is perfectly matched. Once the laboratory has finished the crown, the dentist will cement it into place over the existing tooth where it will be evaluated and adjusted as needed.