Apical microfiltration in obtured canals with apexit, previous dental treatment

The purpose of this study was to compare the apical microfiltration in obtured canals with Apexit, with or without the use of EDTA 10% during 3 minutes, after two and seven days of immersion in the methylene blue to 2%. 50 were selected roots of dental pieces, divided into four groups, Group 1: 5 roots, positive control, preparation chemical-mechanical conventional without shutter root. Group 2: 5 roots, negative control, preparation chemical-mechanical conventional, shutter root with vitremer. Group 3: 20 root, preparation chemical-mechanical conventional, Shutter radicular lateral condensation technique and cement Apexit. Group 4: 20 roots, preparation chemical-mechanical conventional, treatment with EDTA 10% for 3 minutes, sealing root, lateral condensation and cement Apexit. The samples were immersed in methylene blue 2% for 48 hours and 7 days, then were observed under the microscope with a magnification of 40 X, the measurement of penetration was obtained with a rule millimeter. The data were statistically processed through the test of Duncan, showing significant differences between the measurements of seepage into the obtured canals with and without the use of EDTA at 2 and 7 days of immersion in the coloring, lower seepage in the lines treated with EDTA. The filtration recorded a significant increase in time for both study groups. It was concluded that EDTA 10%, removes the layer formed during the chemical-mechanical instrumentation, which favored the accession of cement apexit, reducing the filtration of apical root canal.