Microinfiltrazione apicale con sistemi semplificati di strumentazione e otturazione canalare

Abstract Aim: This study quantitatively compared two simplified instrumentation and obturation integrated techniques, which have been recently introduced, by evaluating the apical seal in single-rooted teeth with a non-destructive procedure. Methods: Twenty-four single-rooted caries-free teeth, which had been previously extracted for periodontal reasons, were divided in two test groups (n°=10) and two control groups (n°=2). The crowns were removed and the roots embedded in alginate into plastic boxes with covers, in order to obtain the electronic working length. For this purpose a K-file and the an apex locator were used. The root canals were thereafter treated with instrumentation and obturation protocols as follows: Ni-Ti Revo-s/One Step Obturator (Group 1); GTX/GT Obturator (Group 2). The specimens were stored for a week in 0,9% sodium chloride containing 0,02% sodium azide solution at 37°C and then underwent a fluid filtration test, following the model described by Çobankara et al. After four minutes to achieve the system’s stabilization, four measurements were made, one every two minutes. The collected microleakage values were analyzed by means of Mann-Whitney and Wilcoxon tests (p<0,05). Results: The final filtration mean values (±SD), expressed in μl/min, were: Group 1, 0,14 (±0,06); Group 2, 0,15 (±0,07). The infiltration was significantly time dependent (p<0,001). No differences between groups were found. Conclusions: In the limits of the present study techniques provided comparable apical seal.