The effect of coronal pre-flaring and root canal irrigant on apex locators’ accuracy: an in-vitro study

Background: Successful root canal treatment is influenced by the apical extent of preparation and eventual filling. Achieving full working length until constriction, which usually 0.5 – 1 mm shorter than anatomical apex, crucial. Electronic apex locators were used to detect more accurately. There are six generations electronic in market. The selection appropriate irrigation with each locator for accurate determination not fully investigated. Methods: actual lengths 120 freshly extracted human single-rooted teeth measured compared their using 3rd generation (Root ZX) followed 6th (Raypex 6) dry medium, presence 5.25% sodium hypochlorite, 2% chlorhexidine, without coronal pre-flaring after same irrigating media. Data collected, tabulated, afterward analyzed one-way ANOVA post-hoc evaluate significant difference average between length, Root ZX, Raypex 6 accuracy. Results: results shown roots that coronally pre-flared a medium locator. While ZX locator, most while chlorhexidine solution. Conclusions: It concluded it very important know specific be achieve results.