I have been doing a lot of research into root canals as I need one done too.
Basically, it is possible for the treatment to fail if the procedure was not done thoroughly enough. If not all the pulp is removed or it's not capped properly then bacteria can get back in and reinfection can occur. You will then need to get the procedure redone (which has a lower success rate) or have the tooth extracted.
Was the treatment done privately or on the NHS? If on the NHS then any further treatment on that tooth should be covered by your initial payment. Even if it's private then if you can show that the treatment wasn't done properly to start with, they shouldn't charge you more to sort it out.
Oh god!! How would i show it wasn't done properly in the first place tho?
I really would not want to have it extracted,i have already had the pre molar pulled due to failed root canal treatment ie --shit dentist-- not enough anasthetic and i wimped out,so ther would be massive space iyswim?
Oh well i have an appt on Monday so will find out then
I had an appointment with a private dentist last week about my RCT and he said that they would do any more work needed on the tooth in the next couple of years without further payment. If the treatment had been done properly then it shouldn't flare up this quickly. But obviously you will have to see what your dentist says.