Root canals are indicated when there is an infection of the tooth, Infections can be caused by deep cavities that have spread to the inner tooth layer that contains the live part of the tooth, the nerve. Sometimes, the infected tooth may be asymptomatic but most of the time, an infected tooth will have symptoms such as pain on hot, cold, and sweets. The pain can come and go and sometimes, it is constant. If these symptoms are present, It is important to visit the dentist as soon as possible as an infected tooth can cause harm to the mouth, face and body.
Root canals have a reputation of being painful and frequently unsuccessful.