Root Canal Fails Again

Root Canal Fails Again

This patient came into the office complaining of sensitivity and only a small amount of pain due to the fact that the tooth’s nerve had been removed and was no longer registering pain. This case clearly highlights the fact that root canal treated teeth are dead, embalmed teeth that can lead to serious jaw bone infections.

As you will see on the X-ray and by examining the tooth, this infection was essentially invisible (hidden under a crown), unfelt by the patient and misdiagnosed by at least one other dentist. Root-canal treated teeth are effectively dead teeth that can, and all too frequently do become silent incubators for highly toxic anaerobic bacteria. These bacteria can, under certain conditions make their way into the bloodstream, causing a number of serious medical conditions—conditions that may not even become apparent until decades later.

The patient came complained of slight pain under the existing crown, which another dentist recommended re-cementing back into place, opting to completely ignore the patient’s issue of pain. Luckily the patient chose to seek another opinion. This picture depicts the condition of the crown.

The primary root canal abscess usually involves both the root tip of the tooth and the dead pulp. A colony of live bacteria builds up inside the root canal and spreads into the surrounding tissue. This rapid spread of infection can cause the dental ligament to develop acute periodontitis (to become inflamed) and can result in mild to extreme pain. Sometimes, the inflammation is so sudden and severe that it pushes the tooth slightly out of the tooth socket and brings even more pain when chewing. In this case, below you can see the severe periapical pathology (infection) around the mesial tooth root:

These types of root canal failures can have serious repercussions on the body, primarily due to the level of toxic bacteria that is released from the infected site into the body. Often various strains of staphylococci and streptococci are contributory microorganism; however, a wide variety of other anarobes microorganisms such as Baccteroides, Peptococcus, Pepr­tostreptococcus, Actinomyces, Eubacterium, and Fusohacterium, are sometimes found. Unfortunately these anaerobes tend to be resistant to antibiotic treatment including penicillin. Below, the discoloration of the dead root-canal treated tooth was surrounded by infection and inflammation.

More often than not teeth treated by root canals result in infection. While this type of infection can remain hidden as it did for the patient in this case, a substantial number of people can and will suffer sudden and insidious pain due to inflammation caused by the aggressive nature of the bacteria. Ultimately the risks associated with root canal therapy will never justify the need to keep a dead tooth in your mouth where it can become an incubator of highly toxic bacteria.



  1. Many irresponsible doctors have increased the suffering of patients. They did not consider the problem from the patient’s point of view.

  2. good site

  3. >The patient came complained of slight pain under the existing crown, which another dentist recommended re-cementing back into place, opting to completely ignore the patient’s issue of pain.

    … Jesus. He should lose his ability to practice dentistry.

  4. I find it hard to believe the high success rate of root canal treatment. I guess it may depend on the dentist doing it, but I have had five upper crowns done over the years and every one of them became infected. This meant weakening them by the dentist drilling the back of them to allow draining. Consequently they were weakened, and once sealed again were still prone to periodic infection again. Result? Weakened, vulnerable roots. Eventually I had little choice but to have them all out and replaced by a bridge. Not impressed by dentistry at all!!!

  5. I have an old root canal and crown, and this week, suddenly found a sore bump on the gums (cheek side). I’m on an antibiotic. Am I forced to have the crown removed, the inner tooth taken out, and an implant?? That’s what was recommended and it’s very costly.

    • Carrie T Says: June 23, 2018 at 11:29 pm

      Which tooth is it? If it is in the top front, before extraction, I would see if an apicoectomy is an option. I have crowns for my two front teeth, both with root canals. I had an apicoectomy on one of them 18 years ago, and have not had a problem with it since. I just went through an apicoectomy on the other one, and I am crossing my fingers this one will be successful, too. When possible, it is always preferable to maintain your original teeth, especially in the top front, where the aesthetics of implants can be very difficult. Find the best endodontist you can and see if the apicoectomy (basically a surgical root canal through the gums) can be an option for you. Do NOT go to a general dentist for this procedure! Endodontist ONLY, and make sure the endodontist uses a microscope for the procedure. Apicos that are done with microscopes have success rates of 90+%. I hope this helps!

  6. My question is I had a root canal had it removed now I have a titanium implant, I have had pain and swelling in my face and behind my eye can I have a bone infection?

  7. Looked at photos so I’m wondering if the root were intact or fractured with microleakage as the post looked large for the roots?
    Also do you have opinions on; a) the disinfection of root canals with ozone and b) disinfection of the root canals with pulsed laser light prior to root filling?

    • Most root-canaled teeth are dry and become brittle. They sometimes end up breaking when they are being extracted. If you have a post in the tooth, the now weakened tooth is even more likely to break when being pulled.

      I don’t agree with the long-term prognosis of ozoning or laser treating root canals.
      Dr. Marvin

  8. Root Canal Problems After In 80210 | Root Canal Denver Says: November 4, 2015 at 6:45 am

    […] Root Canal Fails Again – Natural Dentistry – Hi My cousin had 5 root canal teeth and since I am a neurologist who had read about this procedure, I advised him to remove them all since they are dead. […]

  9. Problems With Root Canal In 80210 | Root Canal Denver Says: November 3, 2015 at 10:43 pm

    […] Root Canal Fails Again – Natural Dentistry – Root Canal Fails Again – Natural Dentistry – There is a lot more going on here that the evil root canal. The crown was obviously leaking bacteria due to a failed … […]

  10. Infection In Tooth With Root Canal In 80210 | Root Canal Denver Says: November 1, 2015 at 3:57 pm

    […] Root Canal Fails Again – Natural Dentistry – There is a lot more going on here that the evil root canal. The crown was obviously leaking bacteria due to a failed seal and secondary decay. […]

  11. […] Root Canal Fails Again – Natural Dentistry – There is a lot more going on here that the evil root canal. The crown was obviously leaking bacteria due to a failed seal and secondary decay. […]

  12. Hello i recently had my 3rd root canal on a back molar and going on a 4th next friday.. my first/secound ones fail due to unfound curved roots… i was refered to a speciolist to work on my 3rd root canal and was informed that i has a small 4th root that was hard to work on and might cause an infection in the future not knowing how long in the future…i was also advice of needing a crown for this specific moler…i been really drepress because of this situation. Dont know what would be the best option..of going on with the crow placement knowing i might get an infection on my molor later on or just extract the molar so i dont risk the infection in th de future…knowing im 26 and defenetly not wanting to be toothless i whant diferent options …please advice.

    • Advice? But a dictionary.

      • Do not be an ass hole. This person is asking for advice, not a fucking grammar class.

        • Right? I bet doc can’t spell every single dental medical terms correctly without any spell check or auto correct. Ain’t nobody got time for that. Besides, unless you can’t understand or make out what words mispellings or not, i would agree, don’t be an asshole. Especially since that person likely is whom keeps your bills paid and gives you job security.
          Perhaps they were using speech to text. Besides you are a dentist not an english professor. Thats why there is no options available for you to circle with red ink or pencil !!

      • “But” a dictionary! Classic.

      • Holy shit. Did you, a doctor, really write this response ?

  13. Hello,
    I recently had crown placed back in May 2013, it was horrible! The dentist tried to refuse correcting it. The crown was extremely big and wide, which would cause me to bit my check and tongue when I spoke. After much arguing with the dental office, they finally agreed to replace it free of charge and just as I thought I was out of the woods with my tooth, I found out TODAY (Aug. 1 2014) that I need a root canal under that new crown. I had complained about slight discomfort and sensitivity to cold liquids for a month to my dental office and they kept insisting that it was because of the new crown. Needless to say, I am very upset that I had to pay for a crown AFTER the dentist told me that I did NOT need one as a different dentist had suggested. What are my options??? This crown is a metal infused crown with porcelain. Also, shouldn’t they be held liable for giving me the wrong information?!

  14. Hi
    My cousin had 5 root canal teeth and since I am a neurologist who had read about this procedure, I advised him to remove them all since they are dead.
    Any way we did a panoramic x ray, I sent it to both mainstream dentist who said all root canal were perfect . And to biological dentist who said they were all infected!!!!!!
    So I just asked the biological one for removal
    After removal, I saw an abscess around them all, all infected infected infected.
    My cousin had no symptoms, no swelling even
    By the way, each tooth was treated by different dentist and some with well known endodentists in my country.

    As a neurologist I will support biological dentistry 100% till proven otherwise.
    I had some studies prove dr. Price work, while I am still looking for a study prove the opposite
    So please if any mainstream dentist read this post, can you provide me with at least one study prove RCT is safe with teeth showing no bacteria later on
    Yes root canal is effective agree….. But I do not think its safe currently

  15. Moses Kochmanski Says: June 6, 2013 at 6:50 pm

    Acute pain might be mild and last just a moment, or it might be severe and last for weeks or months. In most cases, acute pain does not last longer than six months, and it disappears when the underlying cause of pain has been treated or has healed. Unrelieved acute pain, however, might lead to chronic pain.

  16. Ana Enciso Says: May 11, 2013 at 12:03 am

    I currently hve several root canals. I was wondering what are my options.

  17. Ana Enciso Says: May 11, 2013 at 12:02 am

    I currently have several root canals, I was wondering what my options are.

  18. Dr Shvartsman Says: November 17, 2012 at 3:23 am

    Here is another perspective on Root Canal Therapy:

  19. Dr Shvartsman Says: November 17, 2012 at 3:20 am

    There is a lot more going on here that the evil root canal. The crown was obviously leaking bacteria due to a failed seal and secondary decay. This bacterial leakage no doubt contaminated the root canal system causing a secondary infection. In addition the furcation is fractured and decayed. This is clearly seen on the x-ray as the roots are separated and there is furcation involvement (a chronic periodontal infection at the junction of the roots. Blaming this tooth failure and infection solely on the root canal therapy is the wrong diagnosis and also irresponsible. As non-rentists, not fully understanding the processes that have occurred her to cause the failure take you at your word. And your word is dead wrong. Properly disinfected root canal systems with the use of Lasers and possibly Ozone, which are then sealed with biocompatible , non-toxic bioceramic cements and immediately bonded and sealed with fiber reinforced resin composite posts and cores are very viable holisitc therapies that , when done properly will save millions of teeth and not turn patients into dental cripples.

    • Non rentists ? Is that like dentists with an r because if you typed this on a phone i can see how the r was accidentally pressed instead of the d and why auto correct might not pick up on it.

  20. Dr Shvartsman Says: November 17, 2012 at 3:07 am

    Really? The root canal failed??? If you really believe that the main problem with this tooth is rot canal failure , I would be very concerned about your other diagnosis.

  21. Darian Diachok Says: October 2, 2012 at 9:14 pm

    I had a root canal done a month ago, and within the last 24 hours, developed sudden acute pain and the right side of my jaw has swollen out as if I had been kicked by a horse. The swelling is spreading and now I feel a constriction in my throat. This is all extremely worrying since it’s midnight and I have no idea if the Emergency folks at the local hospital would know what to do, and my dentist, an elderly gentleman is unreachable by phone. The internet gives very little advice except to rely on ibuprofen, which I’ve taken in dosages of two and threes all day. I believe I’m reaching some kind of limit with ibuprofen. What else can I do? My appointment is not for another ten hours.

    • You’ve probably (hopefully) already seen your dentist by now, but for anyone else reading this, if you have a toothache late at night, make sure you leave a message with your regular dentist, then search for an emergency dentist online. If you can’t find an emergency dentist, you CAN visit the emergency room. They most likely won’t have a dentist on staff, but they can prescribe antibiotics and/or pain medication depending on the circumstances.

  22. Dr. Marvin

    It is a sad day for the profession of dentistry when a “dentist” blogs such none sense with no scientific background. I would really like to know what your “knowledge” is based on. As an endodontist ( root canal specialist) I know for a fact that root canal therapy has a very high success (rate 80-95%). I will highly discourage any person on this blog from reading or believing any of this so called ” information”. Ask any properly trained dentist and they will tell you the truth about root canals.

    • I would say its safe for me to say that statisical percentage rates are pretty much bullshit because they obviously can not apply to every patient and or endodontist which is how i would conclude they are based on my own experience as a patient who had 2 root canals on two different teeth by one endo less than 7 years ago come to find out recently they both failed. On one though the file tip broke towards the very end of the procedure which she did inform me about. Also could have been the dentists fault due to bad crowns and not re sterilizing before replacing on over root canals.
      But im over the blame game because im just happy to have them both out of my mouth and health slowly but surely healing from the damages occured in a span of the past 3 years of hell.

  23. Thank you for this information, though alarming I’m grateful. Can I ask what I should do if I have had a root canal and capped tooth? I don’t know if I’ve missed this information somewhere…
    Thank you again, Kendra

  24. You’re welcome Renee!

  25. I just wanted to say thank you for sharing this information! We certainly need to get the word out about the dangers of root canals.

    • I had a root canal with a crown that looked like it was failing. My dentist suggested I take the tooth out and get a implant. During the preparation phase of the implant I started to have a metallic taste due to the abutment (metal) . The last was so pronounce It tasted like a battery in my mouth. I had the dr. but a plastic abutment and the gum sealed over it. When the implant went in the laste was back and it progressively got worse. I had the crown placed on and the taste persisted. It has been a nightmare for me because no one know what this is from. No infection is apparent on the X-rays. I had the implant taken out and still have the taste. Im thinking it could be the tissue is infected, nerve lose, bone Graff inlace is causing this act. Can someone tell me what this could be?

      • Google metallic taste in your mouth. It could be a sign that you should see your regular health practitioner and not a dentist.

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