Removal Efficiency of Calcium Hydroxide Intracanal Medicament Using Various Citric Acid Irrigation Techniques
Remnant of calcium hydroxide medicated in root canals may affect on sealing ability of root canal fillings. Vitapex® is an oil-based calcium hydroxide paste which is difficult to be removed from the root canals. The purpose of this study was to evaluate the efficiency of oil-based calcium hydroxide removal using various citric acid irrigation techniques. The palatal canals of 16 extracted maxillary molars were prepared. Teeth were cut longitudinally, then the root halves were reattached and sealed with sticky wax. The root canals were filled with Vitapex®. Three irrigation techniques were tested using the same set of tooth samples. Group 1; canals were irrigated with 10% citric acid, group 2; canals were irrigated with 10% citric acid using NaviTip FX needle, group 3; canals were irrigated with 10% citric acid and ultrasonic file. After each irrigation technique, the roots were then split for stereomicroscopic evaluation. The percentage of canal walls in the middle thirds and the apical thirds coated with Vitapex® were calculated. Results showed that in the apical third, group 3 contained significantly less Vitapex® remaining on the canal walls than group 1 (p < 0.05). In the middle third, group 2 and group 3 showed significantly less Vitapex® remaining on the canal walls than group 1. Group 2 and group 3 showed significantly less Vitapex® remaining on the canal walls in the middle third than the apical third. (p < 0.05)
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