Dental crowns are really common and popular treatment people adopt now a days. Crowns can last for a long time. It depends on the care and precautions you are following. Gold crowns last for decades and have a wide lifespan. Other materials like metal, ceramic etc. are not better than gold. When it comes to replacing of dental crown, the decision should be made carefully. The decision regarding replacing of crown should be made after considering everything as replacing the dental crown everytime damages the pulp which can be very dangerous.