JOE 저널, 에지테이퍼 플래티늄과 프로테이퍼 골드 회전피로파절 비교

 

https://www.jendodon.com/article/S0099-2399(19)30117-7/pdf

 

Basic Research| Volume 45, ISSUE 5, P611-614, May 01, 2019

Cyclic Fatigue and Torsional Failure of EdgeTaper Platinum Endodontic Files at Simulated Body Temperature

Highlights

This study provided data on the cyclic fatigue resistance and torsional resistance of EdgeTaper Platinum (ETP) and ProTaper Gold (PTG) systems.

The ETP was associated with superior cyclic fatigue resistance compared with PTG.

The ETP showed inferior torsional resistance compared with PTG.

Abstract

Introduction

The aim of this in vitro study was to compare the cyclic fatigue resistance and torsional resistance of EdgeTaper Platinum (ETP) with those of ProTaper Gold (PTG) at simulated body temperature.

Methods

ETP and PTG files with #25 tip size were selected. Cyclic fatigue tests were performed in a stainless steel artificial canal until file fracture occurred. The time to fracture was recorded. For the torsional resistance testing, the apical 5 mm of the file was firmly secured with acrylic resin, and the assembly was fixed over torque gauge device. A uniform torsional stress was applied with continuous rotation motion until fracture occurred. The torque at failure was recorded. Both experiments were conducted at 35 ± 1°C. Fractured surfaces were tested via scanning electron microscopy. Statistical analysis was performed using independent Student t test at 5% significance level.

Results

The ETP had superior cyclic fatigue resistance than PTG ( P < .01). However, it exhibited lower torsional resistance ( P < .05). The ETP and PTG showed typical features of cyclic and torsional fatigue behavior under scanning electron microscopy.

Conclusions

The ETP exhibited superior resistance to cyclic fatigue but failed to show any improvement in the torsional resistance compared with PTG.

Key Words

• Cyclic fatigue

• EdgeTaper Platinum

• ProTaper Gold

• torsional resistance