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Background.  The aim of this study was to evaluate the effectiveness of different irrigation techniques in the removal of triple antibiotic paste (TAP), which was applied for 7, 21 or 90 days, from simulated root canals of immature teeth.  Methods.  The root canal spaces of 190 maxillary canine teeth were filled with TAP and randomly divided into a control and 3 experimental groups according to the intracanal medicament period (7, 21 or 90 days). Syringe irrigation (SI), passive ultrasonic irrigation (PUI) and XP-endo Finisher (XP) were used for the removal of TAP (n=20). The amount of remaining medicament was calculated under a stereomicroscope using a 4-grade scoring system. Kruskal-Wallis H and Wilcoxon signedrank tests were used for statistical analyses (P&lt;0.05).  Results.  The mean percentage of residual TAP was significantly greater in the SI group compared to PUI and XP at all the time intervals (P&lt;0.05). Paste removal efficacy of PUI was not affected by the intracanal time of TAP (P&gt;0.05), whereas the efficacy of SI and XP was significantly affected (P&lt;0.05). No significant differences were detected between PUI and XP at 7- and 21-day intervals (P&gt;0.05); however, at 90-day interval, PUI removed significantly greater amount of TAP than XP did (P&lt;0.05).  Conclusion.  The time of the TAP in the root canal negatively affected the removal efficacy of the SI and XP-Endo Finisher; however, it did not affect the efficacy of the PUI.

journal of dental research, dental clinics, dental prospects.

Effect of intracanal time of triple antibiotic paste on its removal from simulated immature roots using passive ultrasonic irrigation and XP-endo Finisher