| Objective: To compare the accuracy of working length obtained using the Propex apex locator in the presence of sodium hypochlorite (NaOCl), Smear Clear (EDTA) and chlorhexidine. Methodology: There were used 30 extracted human teeth with single canal and with complete root formation. Teeth were divided into 3 groups of 10 for each irrigated with NaOCl 5.25%, chlorhexidine 2% and Smear Clear respectively. The working length was done with limes K type # 10 or # 15 (Maillefer) with ducts without irrigation. The file # 10, # 15 was placed in the tube surpassing through the foramen and subtracting 1 mm to obtain a baseline prior to the installation and use of the LEA.
It was taken a second length using the LEA working with Propex canal irrigant within (group 1: 5.25% NaOCl, group 2: 0.2% chlorhexidine, group 3: Smear Clear [EDTA 17%]). Results: The analysis of variance (ANOVA) showed that there are not significant differences (F = 2.27 = 1384, p =. 268) in the average accuracy of the locator in relation to the type of irrigation. The results of this study showed differences between the means of precision locator using different types of irrigation. Conclusions: The apical pager Propex is suitable for measurements in liquid media such as those used in this study. |