Usually because you have had a tooth extracted or knocked out in an accident, leaving you with a gap in your teeth. Closing the space is important for cosmetic reasons, but your dentist has good clinical reasons to fill in
Will the dentist use an anaesthetic?
When the tooth has already been root treated it isn’t necessary, but in most cases your dentist will need to anaesthetise the tooth before working on it so that you don’t feel anything.
How long does a crown last?
Crowns should last for many years. This does heavily depend on how you care for them. Consider the daily habits that could be affecting your crowns, and you’ll be able to extend their wear.