NHS Dentist check up yesterday where I told them a tiny amount of filling came away from a heavily filled molar a few weeks ago. No pain. Dentist X-rayed the tooth and said showing signs of inflammation and would need private root canal treatment at £750 plus £282 for a crown. Now I had root canal treatment on that tooth approx 10 years ago. Is it normal to need this done again? Also if I leave it for now and then in the near future it starts to become infected then won’t it have to be done on the NHS?