You assumed that the root canal and crown took care of the initial problem. This is not always the case, though. That tooth may still be susceptible to an infection. Inadequate Root Canal The goal of root canal therapy is to completely clean the inflamed or infected tissue from the root and then totally seal the space to the tip of the root. But debris left in the end of the canal can harbor bacteria that may cause an infection.
Read more http://www.livestrong.com/article/142943-abscessed-tooth-years-after-root-canal-crown/
Ache in Tooth After a Root Canal & Crown
One of the reasons for failure is a severely fractured root, according to the American Association of Endodontists. Such cracks are not usually detectable before treatment and can cause tooth pain after root canal and crown treatment are completed. Unfortunately, root fractures are not apparent on dental x-rays and can be very frustrating for both patient and brighton dentists. It is only after a persistently painful tooth is extracted that the diagnosis can be confirmed. Missed Canal The goal of endodontic or root canal treatment is to rid the tooth of all inflamed or infected tissue located in the root canals of a tooth. One of the complications that occurs is a tooth with more root canals than normally anticipated, according to the Cleveland Clinic. When diseased tissue is not removed from one of these canals, it causes inflammation or infection to persist in the surrounding bone and ligament.
Read more http://www.livestrong.com/article/140728-ache-tooth-after-root-canal-crown/
Painless Root Canal Alternatives
Instead of hollowing out the tooth and removing the pulp containing the nerves as is done in a root canal, the exposed nerve area is cleaned thoroughly and sealed. “We now have bonding technology that allows us to seal over the nerve using the same liquid plastic that contact lenses are made of,” he tells WebMD. “It hardens to form a hermetic seal that coats the nerve as well as the tooth.” Although the procedure, known as direct pulp capping, has been around for many decades, the use of traditional adhesives resulted in long-term failure rates as high as 80%. Teitelbaum says he has done around 200 direct pulp caps using the newer sealant, with a success rate of 92%. “When this fails patients usually end up having a root canal, which they would have had anyway,” Teitelbaum says.
Read more http://www.webmd.com/oral-health/news/20030718/painless-root-canal-alternatives
Root Canal or Dental Implant?
Read more http://www.webmd.com/oral-health/news/20081119/root-canal-or-dental-implant