How many dental appointments will it take to complete your tooth's root canal treatment?

Traditionally, dentists and endodontists have broken a tooth's root canal treatment up into two or more appointments. The first appointments were primarily focused upon the task of cleaning and shaping the tooth's root canal system. The last appointment, possibly scheduled about a week after the previous one, used for filling and sealing the tooth's root canal system). The reasoning associated with this multi-visit approach was based on the rationale that it optimized the dentist's ability to achieve root canal space disinfection, optimally manage patient comfort, and also have opportunity to monitor the progress of the tooth's healing process.

Opinions about the need for multi-visit root canal treatment have changed.

In recent years and decades, an approach involving single-appointment endodontic treatment has gained attention. Allowing it to become both increasingly popular as well as increasingly controversial within the dental community. As studies evaluating the comparative success of multi-visit and single-visit endodontic therapy have been performed, it has become clear that neither approach is necessarily best but instead that case selection must play the prominent role in deciding which approach is most suitable.

Endodontic research has helped to clarify the issue.

Dental research has suggested that the choice between single or multi-visit treatment should be based upon the degree to which the tooth's root canal system harbors infection. If its infection is limited to just a portion of the tooth's nerve tissue (as it is with vital teeth), then single-visit endodontic therapy makes an excellent, possibly even preferred, treatment modality. In those cases where the entire root canal system harbors bacteria (as is the case with necrotic teeth), single-visit treatment may or may not be an appropriate choice.

This criteria is based upon the fact that no study has been able to show that the bacterial count of an infected root canal system can predictably be reduced to zero in a single treatment session. However, as a point of contention, there are conflicting opinions and evidence regarding the need for complete disinfection before a tooth's root canal system is filled and sealed.

Your dentist may not know which approach is needed until they have begun your tooth's treatment.

Clearly this suggests that making the appropriate choice between single and multi-visit root canal treatment will need to rely heavily upon the treating dentists or endodontist's judgement as based on their knowledge, experience and the specific conditions they find present when they treat your tooth. The latter of which they may not be able to fully evaluate until they have begun the treatment of your tooth.