SEM study of the effect of passive ultrasonic irrigation on the cleanliness of dentinal tubules in endodontic retreatment

Aim and Objective: Endodontic retreatment is indicated in the event of a failure of initial treatment of the root canal and of an initial treatment that looks to be correctable with retreatment. This in-vitro study was designed to assess the efficacy of passive ultrasonic irrigation in endodontic retreatment, by employing scanning electron microscopes, on the cleanliness of dentine tubules with and without solvent in curved root channels. Material and method: Sixty human maxillary molar teeth were treated endontically. The protaper rotary instrument was used in root canals in the crown down procedure under copious 3% NaOCl (2 ml) and Glyde irrigation. The saline solution (1 ml) was used for final rinsing. The 10 sample root surfaces of each group were evaluated for SEM pictures. Results: Amongst group I and II here were more open dentinal tubules that were statistically significant (p<0.05) in Group II without solvent group. Group IV demonstrated larger, statistically significant open dentinal tubules between group  III and IV. The most dentinal open tubules were found in Group IV among the four groups