INTRODUCTION: The aim of this study was to evaluate the effectiveness of different irrigant agitation techniques on smear layer removal in curved root canals. METHODS: Mesiobuccal canals of 62 extracted lower molars with a curvature of 33 degrees were used and instrumented up to ProTaper F2. The samples were divided into 3 experimental groups according to the final irrigation: conventional irrigation, ultrasonic irrigation, and sonic irrigation by using the EndoActivator system. The control group was composed of 2 specimens without any final irrigation. In all of the experimental groups, 5 mL of 17% ethylenediaminetetraacetic acid was used for 1 minute, and 5 mL of 2.5% NaOCl was used for 30 seconds. The analysis of the apical region was performed via scanning electron microscopy by 3 examiners. The data were submitted to the Kruskal-Wallis and Dunn tests (P < .05). RESULTS: The activation systems removed significantly more smear layer than did conventional irrigation. CONCLUSIONS: Sonic and ultrasonic irrigation resulted in better removal of the smear layer in the apical third of curved root canals than did conventional irrigation.
INTRODUCTION: The aim of this study was to evaluate the effectiveness of different irrigant agitation techniques on smear layer removal in curved root canals. METHODS: Mesiobuccal canals of 62 extracted lower molars with a curvature of 33 degrees were used and instrumented up to ProTaper F2. The samples were divided into 3 experimental groups according to the final irrigation: conventional irrigation, ultrasonic irrigation, and sonic irrigation by using the EndoActivator system. The control group was composed of 2 specimens without any final irrigation. In all of the experimental groups, 5 mL of 17% ethylenediaminetetraacetic acid was used for 1 minute, and 5 mL of 2.5% NaOCl was used for 30 seconds. The analysis of the apical region was performed via scanning electron microscopy by 3 examiners. The data were submitted to the Kruskal-Wallis and Dunn tests (P < .05). RESULTS: The activation systems removed significantly more smear layer than did conventional irrigation. CONCLUSIONS: Sonic and ultrasonic irrigation resulted in better removal of the smear layer in the apical third of curved root canals than did conventional irrigation.
Authors: Alexander Pompermayer Jardine; Ricardo Abreu da Rosa; Manuela Favarin Santini; Márcia Wagner; Marcus Vinícius Reis Só; Milton Carlos Kuga; Jefferson Ricardo Pereira; Patrícia Maria Poli Kopper Journal: Clin Oral Investig Date: 2015-04-24 Impact factor: 3.573
Authors: Andrea F Campello; Marília F Marceliano-Alves; José F Siqueira; Simone C Fonseca; Ricardo T Lopes; Flávio R F Alves Journal: Clin Oral Investig Date: 2021-04-26 Impact factor: 3.573
Authors: Li-na Niu; Xiao-juan Luo; Guo-hua Li; Eduardo A Bortoluzzi; Jing Mao; Ji-hua Chen; James L Gutmann; David H Pashley; Franklin R Tay Journal: J Dent Date: 2014-05-27 Impact factor: 4.379