Shaping ability and cyclic fatigue resistance between Genius ProFlex, ZenFlex, and TruNatomy rotary systems: an experimental study.

Restorative Dentistry & Endodontics Pub Date : 2025-02-01 Epub Date: 2025-02-13 DOI:10.5395/rde.2025.50.e9

Raimundo Sales de Oliveira Neto, Murilo Priori Alcalde, Pedro Cesar Gomes Titato, Pedro Henrique Souza Calefi, Carlos Alberto Spironelli Ramos, Guilherme Ferreira da Silva, Rodrigo Ricci Vivan, Marco Antonio Hungaro Duarte

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Abstract

Objectives: The aim of this study was to investigate the efficacy of three newly introduced rotary endodontic systems: Genius ProFlex (Medidenta), TruNatomy (Dentsply Maillefer), and ZenFlex (Kerr).

Methods: Forty-five mandibular molars with root canal curvatures <5° were utilized. Micro-computed tomography scans were performed pre- and post-preparation to assess apical transportation, centralization, percentage of dentin wear, and canal volume alterations. Eight instruments of each diameter underwent cyclic fatigue testing.

Results: The percentage of dentin wear on mesial and distal walls showed no significant differences among ZenFlex, TruNatomy, and Genius ProFlex at 1, 2, 3, and 4 mm from the apical foramen and root canal orifice (p > 0.05). Centering ability varied in the mesiolingual canal (p < 0.05). No notable differences were observed in transportation (p > 0.05). Genius ProFlex demonstrated lower volumetric changes (p < 0.05). There were significant differences in cyclic fatigue, with higher values for Genius ProFlex and lower values for TruNatomy (p < 0.05).

Conclusions: The three nickel-titanium rotary instruments are safe and efficient for root canal preparation, with Genius ProFlex exhibiting superior cyclic fatigue resistance.

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Genius ProFlex、ZenFlex和TruNatomy旋转系统的成形能力和抗循环疲劳性能：一项实验研究。

目的：本研究的目的是调查三种新引入的旋转根管系统的疗效：Genius ProFlex (Medidenta), TruNatomy （Dentsply Maillefer）和ZenFlex （Kerr）。结果：ZenFlex、TruNatomy和Genius ProFlex在离根尖孔和根管口1、2、3、4 mm处近中、远端牙本质磨损率差异无统计学意义（p < 0.05）。中舌管对心能力差异有统计学意义（p < 0.05）。两组在转运方面差异无统计学意义（p < 0.05）。Genius ProFlex的体积变化较小（p < 0.05）。两组间循环疲劳差异有统计学意义（p < 0.05）， Genius ProFlex组较高，TruNatomy组较低。结论：三种镍钛旋转器械用于根管预备是安全有效的，其中Genius ProFlex具有较好的抗循环疲劳性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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