Root canal therapy is indicated during the restoration of a tooth with extensive decay with tooth pulp involvement or compromised vitality and pathology around the tip (apex) of the root in the bone like and abscess or granuloma. Root canal treatment can be very complex and the operating microscope used in our practice is utilised to find and negotiate complex canal systems. During the root canal treatment procedure the entire root canal system is cleaned out to eradicate remaining pulp tissue and all bacteria with a combination of hand instruments and rotary motor driven instrumentation and the canals are chemically cleaned to be able to fill the entire root canal system up to the tips of the roots. The root canal treated tooth can then be restored with a post and core if indicated to form the foundation for the crown or inlay/onlay/filling final restoration. Root canal treatment can also be a solution for very sensitive teeth (cold/heat/sweet sensitivity) if more conservative treatment is not effective.