In the case of devitalized teeth that have crowns older than 10-15 years, with pivots, when should they be changed? This question is asked to us very often, and Dr. Simona Boberis - Dentist, specialized in dental prosthetics and aesthetics, explains the following. Dental crowns are prosthetic pieces that are used to reconstruct a tooth that has lost a lot of tooth substance. They completely cover the crown of the tooth being repaired. A dental crown does not have a predetermined shelf life. The length of time the crown retains its properties depends on: How much tooth substance is missing from the natural tooth [...]