Comparative histological and morphometric analysis of the effectiveness of manual and different recently introduced rotary instruments: An in vitro study

Shalu Krishan, Saloni Gupta

Indian Journal of Oral Sciences 2016 7(2):83-86

Aims: The aim of this study is to evaluate cleaning efficacy of K-file, ProTaper Next, and V-Taper file systems by histological and morphometric analysis. Subjects and Methods: Thirty extracted, single rooted human mandibular premolars were selected. The teeth were randomly divided into three groups with ten teeth each. In Group 1 teeth were prepared with K-file, in Group 2 with ProTaper Next rotary system, and Group 3 with V-Taper rotary system. Histological and morphometric analysis of specimen were done and observed under an optic microscope. Statistical Analysis Used: The data were statistically analyzed using nonparametric analysis of variance Kruskal-Wallis test and the level of significance was set at P < 0.05. SPSS version 12 software was used for statistical analysis. Results: Instrumentation with stainless steel K-files showed minimum amount of debris, followed by ProTaper Next files, and rotary V-Taper files were least effective with the maximum amount of debris; however, there were no significant differences between the three experimental groups. Conclusions: Both the manual and rotary instrumentation are relatively efficient in cleaning the apical third of the root canal system, and the choice between manual and rotary instrumentation should depend on case to case basis.

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