Accuracy of working length measurement by Raypex 6: Electronic apex locator versus actual measurements under stereomicroscope

Background/Aim: This study aimed to evaluate the precision of Raypex 6 apex locator in locating apical constriction (AC) and major foramen (MF) during a root canal treatment compared with microscopic evaluation. Another aim present was accuracy presence different irrigating solutions (NaOCl, saline, EDTA, etidronic acid-HEBP). Material Methods: One hundred nine patients were included this randomly assigned into four groups according irrigation solution used; NaOCl, HEBF saline. Electronic MF (EMF) AC (EAC) measured by using 6. The teeth extracted. 3 mm each trimmed expose file tip. samples observed under stereomicroscope, actual length (ALMF) (ALAC) measured. data analyzed x2 test, significance set at P< 0.05. Results: accurate 71.4% time ±0.5mm 93.3% ±1mm determining ALAC. While similar ALAC-EAC differences saline (p= 0.230), highest seen HEBP group 1.000). working measurement depends on type irrigation. All allowed reliable detection AC. However, significantly increased risk overpreparation. Conclusions: can be recommended for clinical use its is not affected irrigant when MF.