DESOBTURACIÓN DEL CONDUCTO RADICULAR Y USO DE CIANOCRILATO FRENTE A LA MICROFILTRACIÓN.

Objective: to avoid the microfiltration in the root canal using cyanoacrylate to seal the cavity. Material and Method: experimental, transversal, comparative study; done in 60 extracted bottom human canines, one single canal, no calcification, standardizing the radicular portion to 16mm, the biomechanics preparation to 15mm. Three groups were classified: I: disobturated, without apical compaction or coating, II: desobturated, with apical compaction and without coating. III: desobturated, with apical compaction and coated with cyanoctylate using paper cones Number. 55. The external side was covered with two coats of nail polish, except for the apical third and the cervical surface. Dried for three hours, were submerged in blue methyl for 48 hours. After three hours, they were washed up with water and dried for 24 hours. The varnish was taken out and were frozen for 24 hours. Finally they were broken to observe, measure and analyze the micro filtration. Results: The Group III presented a less microleakage compared with the other groups as well as in the ihird apical itself was a minor leak in comparison with the other thirds. These were analysed using the Kruskal Wallis test, which determines that there is difference between the levels of microfiltration in the different groups and thirds of the teeth studied. Conclusion: The cyanoacrylate is a impermeable material and can be used in the root canal. [ABSTRACT FROM AUTHOR]