AIM: The aim of this study was to determine the influence of operator experience on the time needed for canal preparation when using a rotary nickel-titanium (Ni-Ti) system. METHOD: A total of 100 simulated curved canals in resin blocks were used. Four operators prepared a total of 25 canals each. The operators included practitioners with prior experience of the preparation technique, and practitioners with no experience. The working length for each instrument was precisely predetermined. All canals were instrumented with rotary Ni-Ti ProFile Variable Taper Series 29 engine-driven instruments using a high-torque handpiece (Maillefer, Ballaigues, Switzerland). The time taken to prepare each canal was recorded. Significant differences between the operators were analysed using the Student's t-test and the Kruskall-Wallis and Dunn nonparametric tests. RESULTS: Comparison of canal preparation times demonstrated a statistically significant difference between the four operators (P < 0.001). In the inexperienced group, a significant linear regression between canal number and preparation time occurred. CONCLUSION: Time required for canal preparation was inversely related to operator experience.
AIM: The aim of this study was to determine the influence of operator experience on the time needed for canal preparation when using a rotary nickel-titanium (Ni-Ti) system. METHOD: A total of 100 simulated curved canals in resin blocks were used. Four operators prepared a total of 25 canals each. The operators included practitioners with prior experience of the preparation technique, and practitioners with no experience. The working length for each instrument was precisely predetermined. All canals were instrumented with rotary Ni-Ti ProFile Variable Taper Series 29 engine-driven instruments using a high-torque handpiece (Maillefer, Ballaigues, Switzerland). The time taken to prepare each canal was recorded. Significant differences between the operators were analysed using the Student's t-test and the Kruskall-Wallis and Dunn nonparametric tests. RESULTS: Comparison of canal preparation times demonstrated a statistically significant difference between the four operators (P < 0.001). In the inexperienced group, a significant linear regression between canal number and preparation time occurred. CONCLUSION: Time required for canal preparation was inversely related to operator experience.
Authors: Regis Augusto Aleixo Alves; João Batista Souza; Ana Helena Gonçalves Alencar; Jesus Djalma Pécora; Carlos Estrela Journal: Iran Endod J Date: 2013-10-07
Authors: Orlando Aguirre Guedes; Marcus Vinícius Corrêa da Costa; Maura Cristiane Gonçales Orçati Dorilêo; Helder Fernandes de Oliveira; Fábio Luis Miranda Pedro; Matheus Coelho Bandeca; Álvaro Henrique Borges Journal: J Int Oral Health Date: 2015-03