Ex vivo comparative study between four endodontic instruments used to prepare long oval canals

Abstract

The aim of this study was to compare the shaping ability of ProTaper rotary  instruments (Universal), ProTaper rotary instruments (Next), hand ProTaper instruments and traditional NiTi hand instruments in long oval-shaped root canals. Forty human teeth with long oval-shaped root canals were sectioned at one level in the apical third, 3 mm from the apex. A modified Bramante technique was used; changes in the surface area (ΔA) of the root canal were analyzed. The sample was divided into four subgroups of 10 teeth. Each group was prepared using one of the four instrumentation systems. The morphological changes were analyzed using a software program (AutoCAD 2013). The data were subjected to an ANOVA one-way test with a significance level of p<0.05.The changes in the surface area of the apical third of the treated teeth were not statistically significant among the four groups. Resume L’objectif de cette etude etait de comparer la capacite de mise en forme des instruments rotatifs ProTaper, des instruments ProTaper manuels et des instruments NiTi manuels traditionnels dans de longs canaux radiculaires de forme ovale. Quarante dents humaines presentant cette morphologie radiculaire ont ete sectionnees a 3 mm de l’apex. La technique de Bramante modifiee a ete utilisee et les variations de la surface canalaire ont ete analysees a un grossissement x 10. L’echantillon a ete divise en quatre sous-groupes contenant chacun 10 dents, et les dents de chaque groupe ont ete traitees par l’un des quatre systemes d’instrumentation selectionnes. Les modifications morphologiques ont ete analysees par le programme logiciel (AutoCAD 2013). Le test ANOVA utilise n’a pas montre de differences significatives entre les quatre groupes.