Microsurgical endodontic retreatment of post restored posterior teeth: a case series.

Post-treatment apical periodontitis may persist due to biological factors as outlined by Nair or when treatment procedures have been ineffective in eliminating the intraradicular infection. This case series reports on the management of five posterior teeth restored with posts where microsurgical techniques were employed utilising the operating microscope, ultrasonics, micro-instrumentation and mineral trioxide aggregate as a root-end filling material. Healing was evident at 12-month review appointments. Microsurgical techniques have significantly improved the outcomes for healing of periapical lesions when compared to traditional approaches to endodontic surgery. Success rates have been shown to be comparable with conventional orthograde treatment.