Teeth are held in the jaw by their roots. Inside, there are nerves and a blood supply in the ‘root canal’. When the tooth is healthy the nerves are alive, but when decay or injury occurs the nerves can die. A dead nerve inside a tooth can cause the tooth to change colour, cause infection and sometimes pain. Root Filling the tooth means removing damaged or dead nerves and filling the void that remains. The tooth can then be repaired with a restoration.
Nerve damage can cause severe toothache, this pain will disappear when the root canal is cleaned and filled. Without a root filling a tooth with a dead nerve would have to be extracted. Root fillings are usually successful and can last many years.