Every tooth has a space in the middle where the nerves live. If your tooth becomes chronically irritated, inflamed, or infected, the nerve may need to be removed. This allows the tooth itself to stay in your jaws and continue to be used. Teeth that have had root canal treatment ( ie nerve removed from middle of tooth) will often need larger restorations (sometimes even crowns) to build them back up into use.
Root canals sometimes get a bad rap, if the root canal was inappropriate for a tooth in the first place, or the crown is not properly treated, the root canal can fail.
On our Facebook Page Dr Kate recently answered a question about the reliability of root canals and posted the answer in the video below.