It is possible for a dentist to go for Root Canal Treatment with only OPG as diagnostic aid. Depending on the condition such as decay, pulp and periodontal chamber condition, any pathology (if present) at the tip of the roots, an OPG will be enough to take a decision to start RCT. Even some asymptotic conditions will require RCT.
Next Steps
Make sure to ask why exactly is RCT is needed.
Health Tips
No need to worry about this treatment procedure. It simple and painless.