Os resultados desta pesquisa mostraram que, a lima Logic (Easy) apresentou valores estatísticos maiores que os demais sistemas utilizados na metodologia, quando utilizado o movimento rotatório contínuo, seguido do sistema MTwo (VDW), ProTaper NEXT X2 (Dentsply) e Hero (MicroMega).
Utilizando os instrumentos selecionados em cinemática reciprocante e ângulo de curvatura de 30°, não houve diferença estatística entre Logic (Easy), MTwo (VDW) e Reciproc R25 (VDW), sendo estes superiores as limas ProTaper NEXT X2 (Dentsply) e Hero (MicroMega).
Com o aumento do ângulo de curvatura para 45°, a lima Logic (Easy) foi estatisticamente melhor que as demais em cinemática reciprocante, embora, não houve diferença estatística com o grupo controle.
Novas pesquisas devem ser realizadas investigando o desempenho da lima ProTaper NEXT X2 (Dentsply) em movimento reciprocante, pois os resultados encontrados mostraram valores de resistência a fratura cíclica semelhantes a limas com liga de NiTi convencional.
A angulação utilizada no dispositivo teste foi um fator determinante para os resultados. A angulação de 30º apresentou resultados melhores que na angulação de 45º, em ambos os movimentos. Confirmando que quanto maior a gravidade do ângulo de curvatura maior a susceptibilidade a fratura dos instrumentos.
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