ABSTRACT

The existing root filling is removed and the infected root canal is disinfected using irrigants and medicaments. This is often the preferred treatment modality for a failed root filling. Root canal retreatment can be complicated since restorations may need to be dismantled in order to gain access to the canal system. The tooth should be assessed for

restorability before this prolonged and often expensive treatment is started. If the tooth is unrestorable then it may be better to extract it and provide an alternative replacement.