Automatic Electronic Device Used for the Evaluation of Cyclic-Fatigue Resistance of Nickel-Titanium Instruments

The aim of this study was to evaluate the cyclic-fatigue fracture of different Nickel-Titanium motor-driven rotary instruments (ProTaper® Universal, ProFile®, and Mtwo® systems) in artificial canals by means of an Automatic Electronic Device (AED). The study was performed using Nickel-Titanium instr...

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Detalhes bibliográficos
Autores: Gaitán-Fonseca DDS, MSc, PhD, Cesar, Lara-Alvarado DDS, MSc, Edith, Flores-Reyes DDS, MSc, PhD, Héctor, Pozos-Guillén DDS, MSc, PhD, Amaury, Méndez-González DDS, MSc, Verónica
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2017
País:Costa Rica
Recursos:Universidad de Costa Rica
Repositório:Portal de Revistas UCR
Idioma:inglês
OAI Identifier:oai:portal.ucr.ac.cr:article/27288
Acesso em linha:https://revistas.ucr.ac.cr/index.php/Odontos/article/view/27288
Access Level:Acceso aberto
Palavra-chave:Cyclic-fatigue
Nickel-Titanium instruments
Automatic electronic device
Rotary instruments
ProTaper® Universal System
ProFile® System
Mtwo® System
Descrição
Resumo:The aim of this study was to evaluate the cyclic-fatigue fracture of different Nickel-Titanium motor-driven rotary instruments (ProTaper® Universal, ProFile®, and Mtwo® systems) in artificial canals by means of an Automatic Electronic Device (AED). The study was performed using Nickel-Titanium instruments 25/0.06 evaluated in canals with a 45-degree curvature and 2-mm radius. The analyses evaluated two parameters: fracture by cyclic fatigue, and time of fracture; in addition, the length of separated fragment was evaluated. Medians and range values were calculated for each group. Data were analyzed by the Kruskall–Wallis and Mann–Whitney U tests to determine statistical difference. The ProFile motor-driven rotator system exhibited highest resistance to fracture due to cyclic fatigue and highest fracture time compared with the ProTaper and Mtwo systems (p <0.05). The equipment proposed in this study (AED) demonstrated efficiency for recording information, automation, scheduled work times and durations, cycle number, time of fracture, pressure changes and, principally control of the human factor.

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