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Dentistry/Root Canal Complication


Hello, may I have your explanation and advise please. I had root canal procedure for premolar tooth from a reputable health facility in August 2014. The dentist advised me to go fro checking after six months. I had job transfer to another city in the following month (September). After four months I noticed a blister besides the tooth. I went to see the dentist (not the one who treated me-I am in another city),he gave me antibiotics and said the blister will go off. it worked for a while but the blister showed up again. I went to the same dentist, he advised I extract the teeth. I asked him to let me think and would come back.
I went to see another dentist in another facility, he said it was a mere infection. i should use mouth wash. I did, but it took only few days, the blister re-emerges now and then.

Last December I went to the very first facility, where the root canal procedure was done. the dentist who attended me is no longer working there. I had another dentist who took the x-ray on the tooth. He said there is infection down there. he explained that it re-occurs when my immune system is a bit low and disappears when the immune is up. The tooth need not extraction.He advised check after every six months

Now i am getting a bit worried. i have different explanations from 3 people of the same cadre. my questions are:
1. if the blister re-occur now and then, means the infection persist down there, is it not going to cause some complications like cancer etc.

2. is it not the right time that i get the teeth extracted? I d wish to keep it but I would be ready to take it off than developing complications in future

3. what do you advise me?

hello neema,
I will answer your question in one paragraph :

the occurrence of a blister in a previously root canal treated tooth is an indication of a failed rct due to reinfection. such teeth can be healed/ cured but only after thorough evaluation by a root canal specialist (endodontist).
no you wont get cancer and yes the tooth can be saved in 5/10 cases (ie 50% chance).
visit an endodontist near you and you will not be disappointed.
best wishes  


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dr mayank kaurani BDS, MDS


rootcanals, cosmetic dentistry, dental pain, cavities, tooth colored fillings, endodontic diagnosis, post & cores, ceramic veneers, composite fillings, dental whitening, bleaching etc. please remember: i cannot treat you online and neither can i touch your teeth or test their health! i can give you general suggestions and critically evaluate various treatments and offer my advice.


14 years of clinical experience. i am a professor in a postgraduate dental school, in the department of endodontics. my primary field of specialization is in endodontics and conservative dentistry. i am a consultant endodontist in private dental clinics and run my own clinic restricted to conservative dentistry & endodontics since 2006.

DENTAL SPA, JAIPUR (INDIA). Mahatma Gandhi Dental College, jaipur(india)

new york state dental journal journal of contemporary dental practise

BDS, MDS (conservative dentistry & endodontics)

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