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Re Root Canal Treatment

A tooth that has been root treated can last many years, particularly if it is appropriately restored following root canal treatment. On occasion, teeth can fail to heal or become infected again. This can happen months or years after the original treatment. The tooth becomes painful and sometimes a gum boil can appear, sometimes there are no symptoms and the failure is only detected with an x-ray. Carrying out re-treatment can give the tooth a second chance.

Failure of a root canal treatment can happen for several reasons:

Most common:

  • Bacteria (infection) remaining within the canals e.g missed or incompletely filled canals
  • New bacteria have entered the root canal e.g through a lost or broken restoration (filling/crown/bridge), decay or root fracture

Less common:

  • Infection has spread from within the root canal and into surrounding tissues
  • A reaction to the filling materials placed beyond the root canal into the tissues surrounding tooth
  • A cyst has developed at the end of the root (although often these will heal with root canal treatment)
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