The Effect of Calcium Hydroxide and File Sızes on the Accuracy of the Electronic Apex Locator in Simulated Immature Teeth

Abstract

Objective: The aim of this research was to appreciate the effects of different file sizes and the presence of calcium hydroxide on the correctness of the electronic apex locator (EAL) at simulated immature teeth. Methods: In this study, 30 maxillary central teeth were used beforehand extracted due to periodontal reasons. The actual root canal length determined with K-File and measured behind 0.5mm from the apex. In order to simulate an immature tooth, the apical of roots were prepared with a diameter of 1,4mm Gates-Glidden drills and K-Files. Working lengths of samples were measured using the Root ZX by 110-140 K-Files. Each measurement was repeated three times and averaged. Then all the samples were filled with calcium hydroxide medicament and working lengths were determined by the same method. Statistical analysis was performed using the Two-way ANOVA. Results: The measurements were closer to the actual root canal length as the diameter of the file increased at the presence and absence of calcium hydroxide. However, there was a difference between the presence and absence of calcium hydroxide in the determination of root canal length. Conclusions: In these experimental study conditions, it was concluded that the presence of calcium hydroxide in simulated immature teeth and file size affect the EAL.