Today, with modern dentistry, root canal treatment has become a common form of treatment for diseased (abscessed) teeth. This treatment can be provided by your regular dentist or root canal specialist (Endodontist). Here’s how it’s done: In healthy teeth, the interior of the tooth is filled with tissue (pulp). Once the tooth is injured, cracked, or decayed, it is necessary to open the tooth and clean out the infected tissue in the centre. This space is then filled and the opening sealed. During the procedure the area around the tooth is frozen. Sometimes difficulties may be encountered during or after root canal treatment. This may require the use of medication or involve further treatment. A crown or cap may be necessary to protect the tooth, once the root canal treatment has been completed. Teeth that have had root canal treatment can stay as healthy and last as long as other teeth. In most instances, you won’t be able to feel or see a difference. Information as per the Ontario Dental Association.