This is the area where the pulp ends and the periodontal ligament begins. The proper point at which root canals should be prepared and obturated is the cementodentinal junction (CDJ), which is also described as the minor foramen. The EALs Raypex 5 and ApexDal had higher accuracy in the anatomical foramen of the root containing chlorhexidine in the gel or in the solution form than in the canal containing sodium hypochlorite.Īccurate working length (WL) determination is a challenge for dentists. No statistically significant differences were observed between the Raypex 5 and ApexDal for all intracanal media tested. Statistically significant differences were found between CHX-S and NaOCl and CHX-G and NaOCl, but no significant differences were detected between CHX-S and CHX-G during the testing of both devices. Last, the distance between the file tip and the apical foramen was measured under a microscope at 60 x magnification. Afterwards, the roots were removed from the alginate mass, and the apical one-third of each root was cut lengthways to recover the canal system. After performing an endodontic measurement, the endodontic instruments were stabilized with flow resin composite. For each EAL, measurements were taken with the following products: 2% chlorhexidine solution (CHX-S group), 2% chlorhexidine gel (CHX-G group) and 2% NaOCl (NaOCl group). In each tooth, six endodontic measurements were made using two electronic apex locators (EALs): a Raypex 5 and an ApexDal. The crowns were cut horizontally and embedded in an alginate mass. Twenty-nine single-rooted human teeth were used in this study. The aim of this study was to determine the influence of 2% chlorhexidine digluconate solution, 2% chlorhexidine digluconate gel and 2% hypochlorite solution on the accuracy of two devices: the Raypex 5 and the ApexDal. Accurate determination of working length (WL) is crucial for the success of endodontic therapy.
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