Tooth and Mouth Problems

I think I have overbite .. I want to know about the overall expenses to fix this problem.

I have a two decayed teeth. Now I have to cure it with root canal. What is the cost of that two teeth for root canal

I have Ulcer in my month since 2 weeks. I daily  Eat yogurt to avoid ulcer but still facing the same issue.

I can't eat any spicy foody. It started last Saturday. The same problem facing my sister also.

My doc appointment is tomorrow but i have little pain so can i take 1 ketorol dt but 3 houres ago i took 1 this tablet is it safe to take another?

My lips is swollen on the outside and it is having pus on it... It is painful, itching etc.

Sir I used to get tooth sensitivity when I take sweet food, especially in the pre molar teeth of lower jaw. Hope for your valuable suggestion. Thanks-

I have been having rapid pain day and night in my tooth from 2 days i have cavity problem what to do please suggest

Regarding teeth braces i want to do braces and have very tiny tooth cavity. the dentist suggested me to clean the cavity before braces fixing. but i want the cavity treatment during the treatment period when i visit him monthly braces checkup . so what should i do ....can i do cavity tret during the braces monthly checkup or have to do it before fixing the braces and WHY? your reply will be so helpful... thanks

I have a recurrent aphthous stomatitis in my mouth. Not able to eat little spicy food. Usually prefer to eat yogurt. Still facing the problem since 2 weeks