After having a very deep filling around the nerve of a molar tooth (bottom set second from the back) 2 months ago it has become very painful and i now have some swelling in my cheek/gum tissue. My dentist has told me that although Root Canal Treatment is available on the NHS it would not work well in this case and is likely to become re-infected. This is due to a more complex root system in molar teeth and their awkward position making it difficult to clean the bacteria from the small root canals. Also use of a cold rubber filling solution does not give good adhesion to the canal wall and means it is hard to fill to the ends of the roots which may leave spaces that can then become infected. With specialist treatment the risk of bacterial infection would be reduced by using a hot liquid rubber filling solution which can get to the ends of the roots. This requires the use of specialist equipment (hot melt glue gun I thought) and demands a special price £450. A crown would then be put on top in a separate treatment which is metal on the NHS. White available privately £250. So it seems that in this case it is impossible to get adequate RTC treatment on the NHS! Has anyone got any counter information?