Root canal redo by endodontist. Do I need an implant instead?

Allow your endodontist to be your guide as to his/her thoughts on the long term success of a root canal.  If not certain of a high probability of success, then I would consider having the implant placed.  This would require the tooth to be extracted and bone grafted.  After a period of time (usually 3-6 months), you are ready to have the implant placed.  Three to four months after placement you can have the implant restored with a crown.  I would not bother contacting you previous dentist.  He/she provided a service that worked well for almost 15 years. You certainly got some good use out of it!  Good luck.     

I didn't read anything in your description of your situation that sounds like there's any need for treatment at this time. unless you're having discomfort or there is a reason to believe that the teeth are infected, then I would simply monitor periodically.If the teeth are infected or you're having discomfort, then you have serval choices. You can have the root canal's redone, or you can have a surgical procedure called an apicoectomy, ir you can replace the tooth with a dental implant. You would need to discuss with your dentist which of these three options would make the best sense for you.I hope you found this information to be helpful,Dr. Champagne

Are there any symptoms or infection notedif not I would leave alone .  If there is pathology then I would try to retreat first    Implants are a great option. But saving a good tooth is usually the first choice calling the prior Dr after 14 years is pushing it a little