Can a core buildup be done on a tooth that has not had a RCT?​

Hello, my name is Miles. Without knowing which tooth had the root canal (i.e., was it an incisor or a molar?), and without an x-ray and ideally an intraoral photograph of the tooth, this question is impossible to answer.  However, there are some general guidelines that I believe apply....

Hi:It is sometime difficult to exactly spot the origin of the pain.  Tirgeminal neuralgia, missed canal, infection, clenching or grinding can be some of the possible causes.  I suggest to take a Cat Scan of the area to check the root canal tooth more accurately.Best,Dr. Maddahi

Hi:Sorry to hear about your situation.  Unfortunately without a photo it is difficult to judge the size and the contour of the crowns.  It's best to post a photo.Best,Dr. Maddahi