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Cyclic and Torsional Fatigue Resistance of Seven Rotary Systems.
Furlan, Renan D; Alcalde, Murilo P; Duarte, Marco A H; Bramante, Clovis M; Piasecki, Lucila; Vivan, Rodrigo R.
Afiliación
  • Furlan RD; School of Dentistry, University of São Paulo, 17012-901 Bauru, SP, Brazil.
  • Alcalde MP; School of Dentistry, University of São Paulo, 17012-901 Bauru, SP, Brazil.
  • Duarte MAH; School of Dentistry, University of São Paulo, 17012-901 Bauru, SP, Brazil.
  • Bramante CM; School of Dentistry, University of São Paulo, 17012-901 Bauru, SP, Brazil.
  • Piasecki L; School of Dentistry, University of São Paulo, 17012-901 Bauru, SP, Brazil.
  • Vivan RR; School of Dentistry, University of São Paulo, 17012-901 Bauru, SP, Brazil.
Iran Endod J ; 16(2): 78-84, 2021.
Article en En | MEDLINE | ID: mdl-36704225
Introduction: This study aims to evaluate the cyclic and torsional fatigue resistance of seven rotary systems. Methods and Materials: A total of 140 instruments were tested, 20 of each system including Genius (GN) 25/0.04, TruShape (TS) 25/0.06, Logic (LOG) 25/0.06 taper, Vortex Blue (VB) 25/0.06, ProTaper Gold (PTG) 25/0.08, Hyflex CM (HCM) 25/0.06 and Hyflex EDM (EDM) 25/0.08 taper. Cyclic fatigue resistance testing was performed using an artificial stainless steel canal with a curvature (60° angle and 5-mm radius) located at 5 mm from the tip. The files (n=10) rotated until fracture, and time was recorded in seconds. The torsional test was evaluated according to ISO 3630-1. Data were analysed with one-way ANOVA and Tukey's tests (α=5%). The fractured surface of the instruments were assessed using scanning electron microscopy to confirm the type of fracture. Results: The cyclic fatigue resistance value of EDM was significantly higher than those of all tested instruments (P<0.05). LOG showed a higher cyclic fatigue resistance than GN or TS (P<0.05). There was no difference among the other groups (P>0.05). The torsional test showed that PTG 25/0.08 had the highest torsional strength value of all instruments tested followed by VB and EDM (P<0.05). The LOG showed significant difference only with GN (P<0.05). No difference was found among the other groups (P>0.05). In relation to angular deflection, the GN; TS; HCM, and EDM showed significantly higher values until fracture than the other groups (P<0.05). No difference was found among PTG, LOG, and VB (P>0.05). Conclusion: Our in vitro study EDM group had the highest cyclic fatigue resistance among all the tested instruments. For the torsional test, the PTG showed highest torsional strength and lowest angular deflection values.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Iran Endod J Año: 2021 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Irán
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Iran Endod J Año: 2021 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Irán