Endodontic techniques with Nickel Titanium instruments: analysis of quality and efficiency of instrumentation in primary molars

ABSTRACT Objective: The purpose of the present in vitro study was to evaluate efficiency three different instruments root canals artificial primary molars as well quality fillings. Methods: Sixty were divided into groups 20 teeth. Each group submitted a technique: Group 1 - conventional manual technique using Kerr files; 2 with nickel-titanium 3 NiTi rotary technique. filled calcium hydroxide paste. Aspects such homogeneity fillings, taper and flowability preparations considered comparatively assess instrumentations. non-parametric Kruskal-Wallis Mann-Whitney tests used compare preparation canal considering times them. Results: All techniques equally effective at shaping working time shorter instrument (p=0.000). In pairwise comparisons, compared steel files (p=0.000) Comparing techniques, (p=0.011). Moreover, less variability found when used. Conclusions: mechanized method led operating comparison is therefore preferable option for