What are the likely success rates?
Well controlled clinical studies that have been published in dental journals, report success rates of around 90% for first time root treatments done by specialists or within a hospital environment.
These success rates are reduced to about 80% if the tooth has already been root canal treated.
The only studies to give an indication of general success rates are epidemiological (epidemiology; the study of disease within a community) studies. Reported success rates are generally much lower at 50-60%.