This procedure is recommended if a tooth has cracked or is missing a large portion for example like after a Root Canal procedure. A crown takes 2 appointments. At the 1st appointment, the tooth is prepared and a scan of the tooth is taken. The Scan is then sent to a lab where the crown will be made. You will leave your from your 1st appointment with a temporary crown or bridge and return 2-3 weeks later to have the final/permanent crown or bridge cemented.