Effect of different glide path establishing systems on apically extruded debris in curved root canals – An in vitro study

Abstract

ABSTRACT Aim: The aim of this study was to evaluate the effect of different glide path establishing systems when used along with WaveOne Gold (WOG) single-file reciprocating system and ProTaper Gold (PTG) rotary multifile system on apically extruded debris in curved root canals. Methods: Eighty extracted mandibular molar teeth with curved mesial roots were selected for this study. Specimens were randomly divided into eight experimental groups according to the root canal preparation (n = 10): Group 1 (WOG + H and K-file), Group 2 (WOG+ G-Files),Group 3 (WOG+ One G), Group 4 (WOG + ProGlider), Group 5 (PTG + Hand K-file), Group 6 (PTG+ G-Files), Group7 (PTG+ One G), and Group 8 (PTG + ProGlider). Roots were attached to preweighed Eppendorf tubes. All instruments were used according to the manufacturers’ instructions. During root canal preparation, 8 mL of distilled water was used for each specimen. Apically extruded debris was collected in Eppendorf tubes. After the completion of root canal preparation, Eppendorf tubes were removed from the specimens and stored in an incubator at 70°C for 5 days. Eppendorf tubes were weighed after evaporation to calculate the amount of extruded debris. The data were subjected to statistical analysis using one-way analysis of variance and post hoc Tukey’s test at a significance level of P < 0.05. Results: A statistically significant difference was observed between the ProGlider and K-file groups. The ProGlider group was associated with significantly less debris extrusion than the K-file group for both the shaping systems used: WOG (P = 0.048) and PTG (P = 0.044). There was no statistically significant difference between NiTi rotary glide path files: ProGlider, G-Files, and One G files. All experimental groups caused apical debris extrusion. Conclusion: Among all mechanical glide path files tested, ProGlider showed the least debris extrusion which was significantly less than K-file. Glide path preparation using NiTi rotary files in combination with rotary shaping files (PTG) was associated with less apical debris extrusion than the rotary glide path files used along with reciprocating file (WOG).