Avaliação da eficácia dos localizadores apicais eletrônicos NOVAPEX, ROOT ZX e APEX D.S.P: estudo ex-vivo

Abstract

Currently, electronic devices are the main method of the tooth length, but there is controversy about the accuracy of such equipment. This study, ex vivo, had the objective of evaluating the effectiveness of electronic locators (EL) NOVAPEX, ROOT ZX and APEX DSP, considering a tolerance of 0.5 mm between measuring electronic (EM) and the real extent of the tooth. Twenty single-root teeth have been wore out until the height of the pulpal camera and accessed with diamonds ball broach #1012 in high rotation. Initially, the real measure of the tooth was determined by the visualization of a file type Kerr (LK) #10 in the foraminal exit (Group CA). Next, the samples were placed in a mold base alginate / 0.9% saline, and the EM performed with the EL NOVAPEX (Group CB), ROOT ZX (Group CC) and APEX DSP (Group CD). In each EM the samples were irrigated with 2 ml of NaOCl 5,25%. All of the measures have been verified by a digital caliper (Lee Tools) and by an optic clinic microscope (DF Vasconcelos). The groups were compared in pairs using the Wilcoxon test (p < 0,05). And the sets of differences between groups (CB, CC and CD) and the actual length (CA), were compared, considering the reference value of 0.5 mm by Binomial test. We conclude that the EL NOVAPEX and EL ROOT ZX were effective, that is, the ME equivalent such as real tooth length and EL APEX DSP was not effective considering a tolerance of 0.5 mm between measurements.