Hello Dear, As you had told in your question that RCT has already been done on your tooth and you had read a lot about it on internet, see my brother complications can happen in any case but it is not like that it can happen in every case. RCT is a proven method and is performed from many years. I am doing it from past 14 years. Please dont worry much about it. Regards, Dr Vishal Jain faridabad

RCT is the root canal treatment to clean  and disinfect the root canals of teeth which are grossly carious, infected and whose infection and caries have approached the pulp or in cases where there is exposed pulp. This treatment is advised in cases when the patient is not willing for extraction of tooth or in cases where there's possibility of saving the teeth. However as this is technique sensitive process and there's chances of relapse of infection inspite of best treatment done and the success rate of RCT is internationally claimed to be around 70%. If the RCT is not successful then Re -RCT can be done or extraction of the tooth can be done. Later on Bridge can be given on missing tooth.