Evaluation of the tip of standardized D0 gutta percha cones of four Rotary systems, by means of an endodontic ruler

Juliana Do Prado Tavares Bueno,Gustavo Golgo Kunert,Tiago André Fontoura De Melo

doi:10.1590/1981-863720170002000023168

Juliana Do Prado Tavares Bueno, Gustavo Golgo Kunert + Show 1 more

Open Access

https://doi.org/10.1590/1981-863720170002000023168

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Abstract

ABSTRACT Objective : This study aimed to evaluate the D0 diameter of standardized gutta-percha cones for four mechanized systems: ProTaper Universal®, Mtwo®, Wave One® and Reciproc®. Methods: An endodontic calibrator ruler was used to measure the D0 diameter of 60 main cones of the above systems. Measurements were made according 3 scores as follows: gutta-percha cone fits exactly into the same hole as the endodontic ruler gauge (score 1), cone falls short of the ruler gauge whole size (score 2); or exceeding the ruler gauge hole size (score 3). The diameters D0 obtained were compared with the values reported by manufacturers. All data were analyzed by means of T Test, at 1% level of significance. Results: The average value measured was significantly higher than the measures established by manufacturers (p <0.001). Conclusion : The gutta-percha cones of ProTaper Universal® systems Mtwo®, Wave One® and Reciproc® were not standardized, except for R40 cone of the Reciproc® system (Reciproc®). The trend was for variation in the D0 Diameter towards increasing measurement values.

Highlights

The trend was for variation in the D0 Diameter towards increasing measurement values
One of the factors related to successful endodontic treatment is hermetic sealing of the root canal, performed during the filling stage[1]
RGO, Rev Gaúch Odontol, Porto Alegre, v.65, n.4, p. 299-302, out./dez., 2017 percha cone to the apical region is fundamentally known to depend on perfect coincidence of its D0 diameter with that of the instrument used for apical preparation[2]

Summary

Introduction

One of the factors related to successful endodontic treatment is hermetic sealing of the root canal, performed during the filling stage[1]. Diverse studies analyzing the diameter and morphology of gutta percha cones have warned about the lack of standardization in the manufacturing process[3,4,5,6]. This reality harms the objectives of standardizing materials, and makes clinical practice difficult. According to Mayne et al.[7] and Goldberg et al.[8], among the contents of a box of No.[40] gutta percha cones, variations in their diameter range from Number 35 to 45, demonstrating imprecision in the entire sample analyzed

Methods

Discussion

Conclusion