Other root canal videos - http://www.dental-picture-show.com/endodontics/a-root-canal-index.html | Root canal therapy sometimes fails because bacteria and contaminates have been able to seep back inside the tooth (a process termed Coronal Leakage). Placing the right type of dental restoration (possibly a dental crown) after root canal treatment can aid in preventing the problem of coronal leakage and increase the long-term success rate for the work the tooth has had performed.
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