As you may know, the tooth is made up of outer hard enamel, inner dentin and innermost cavity is filled with nerves and blood vessels.
Pain comes in the last stages of tooth decay, and that is when only a permanent filling will not suffice. On the contrary, that will worsen the issue.
In case you are not convinced that you need a RCT, you may take a second opinion, but do not postpone the treatment. Infection once set in keeps progressing, making it difficult to save the natural tissues.
Tentative cost range in our clinic:
Permanent tooth colored filling Rs. 800 to 2500 depending upon the extent of filling
RCT Rs. 4000 to 8000 plus Rs. 2000 for core buildup (which is required before cap fitting)
Caps Rs 3000 to 28000 depending upon the material and technique used
Next Steps
Get the infected tooth treated by a good root canal specialist
Health Tips
Do not procrastinate. It only increases the problem and cost.