<s>[INST] I had a root canal done twice  on the same tooth.  I had to see a specialist the second time.  Need less to say Ispent a lot of money on this one tooth.  Im still having tooth aches. And I am now having headaches everyday.  I believe they did the root canal on the wrong tooth. [/INST] Hello, Welcome Thanks for consulting Chat Doctor, I have gone through your query, as you have pain even after root canal treatment then it can be due to Periapical pathology or due to you have periodontal pocket in Fixed prosthesis (Capping) . For this you should consult dentist and go for investigations IOWA x-ray if won't get relief then go for Extraction and then fix prosthesis. Hope this will help you. </s>