Usually you don’t come to the dentist until your tooth starts to pain. It is not that late to save it if there is even a slight tooth structure left.
Root canal treatment (RCT) is a procedure of removing the decayed part of the tooth and making it bacteria free, thus reducing the infection. It is similar to preserve the tooth.
Root canal treatment can be done to the tooth if there is decay, or it is painful or if a trauma has occurred, vital or non-vital.
Procedure of RCT
This procedure is mostly painless or can be done under local anesthesia.
Saving the tooth is quite cost effective and better option rather than having the tooth removed and getting it replaced.