Whether it is temporary or permanent, attention is needed when something comes off your tooth because teeth can permanently move in as few as a couple of days. If your crown comes off during business hours, call us and we will arrange to see you the same day or the following day. If it is after hours and we will return to the office in two days or less, it is not necessary to call for immediate attention. Many times the crown will stay on if you simply place it back on the tooth, pushing it down firmly. If it falls out easily, do not leave it in your mouth as it could be accidentally swallowed or inhaled into the lungs. Pharmacies have crown cement kits which are paste mixtures for temporarily re-cementing of a crown. A thin slurry mixture of flour and water works well also.