Resumen

CASTRO-NUNEZ, Gabriela et al. Comparison of ProTaper Universal system with adulterated homologous: descriptive study. Rev. Estomatol. Herediana [online]. 2016, vol.26, n.3, pp.184-190. ISSN 1019-4355.  http://dx.doi.org/10.20453/reh.v26i3.

Objectives: To describe the macroscopic, microscopic characteristics and material characterization of nickel titanium (NiTi) ProTaper Universal system scompared to similar instruments of dubious origin. Material and methods: Macroscopic analysis was performed using macro photography of the boxes and files. For microscopic analysis, S1 and F1 files were used, which were sectioned and analyzed by scanning electron microscopy comparing active parts and cross-sections at 300-550X magnification. Additionally, the characterization of fragments was performed by energy dispersive x-ray microanalysis (EDX). Results: Macroscopic analysis showed that boxes differed in design and specifications. File shanks showed differences in shape, color, finish. The active part of some files showed differences in diameter, shape and finish. Microscopic analysis indicated that adulterated files showed less sharp cutting angles and absence of triangular convexities. By EDX, comparing the chemical composition of the instruments, it was shown that both instruments have a composition Ni-Ti like. Conclusions: The major differences between ProTaper Universal system and its counterpart adulterated, were presented in macroscopic analysis. Microscopic analysis showed differences mainly in cross-section configuration.

Palabras clave : endodontics; Ni-Ti; photography; microscopy; x-ray microanalysis.