Efficiency of the nickel-titanium rotary instruments for glide path preparation: in-vitro preliminary study

Kim,  Hyeon-Cheol; Kwak,  Sang Won; Ha,  Jung-Hong

J Korean Dent Assoc > Volume 55(10); 2017 > Article

The Journal of The Korean Dental Association 2017;55(10):688-694.
Published online October 31, 2017.

Glide path 형성용 니켈티타늄 회전 파일의 효율: in-vitro 예비 연구

김현철¹, 곽상원², 하정홍³

^¹부산대학교 치의학전문대학원 치과보존학교실
^²부산대학교 치의학전문대학원 치과보존학교실
^³경북대학교 치의학전문대학원 치과보존학교실

Efficiency of the nickel-titanium rotary instruments for glide path preparation: in-vitro preliminary study

Hyeon-Cheol Kim¹, Sang Won Kwak², Jung-Hong Ha³

¹Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute
²Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute
³Department of Conservative Dentistry, School of Dentistry, Kyungpook National University

Abstract

Objectives
This preliminary study compared the effects of glide path establishing instruments prior to substantial root canal preparation. Materials and Methods: Glide path was established by enlargement of the 2nd mesiobuccal root canal of Dentalike by using three kinds of glide path preparation nickel-titanium file; PathFile, One G and ProGlider. The pre- and post-instrumented Dentalikes were weighed in the resolution of 1 / 10mg. In addition, after glide path preparation, torque generated during shaping using the WavoOne file was measured. The data were analyzed by one-way ANOVA and Tukey post-hoc test at a significance level of 95%. Results: The ProGlider had the significantly larger amount of reduced weight than other instrument groups (p < 0.05). There was no significant difference between group of glide path preparation with ProGlider and without glide path preparation in maximum torque and total stress generation during the shaping with WaveOne. Conclusions: Glide path preparation instruments may have different efficiency according to their geometries. The Dentalike artificial teeth were revealed to have discrepancies in the size of root canals by microCT examination. It is impossible to make a meaningful judgment of the results due to the reliability or resolution problem of the root canal size of the artificial tooth selected as the standardized tooth.

Key Words: artificial tooth;simulated canal;Dentalike;Glide path preparation;nickel-titanium file;