Assessment of smear layer removal protocols in curved root canals

作者：Yeung William; Raldi Denise Pontes; Cunha Rodrigo Sanches; Mello Isabel^*

来源：Australian Endodontic Journal, 2014, 40(2): 66-71.

DOI：10.1111/aej.12038

• EDTA
• irrigation
• root canal
• smear layer
• sonication

This study sought to assess if the final rinse protocol interferes with the smear layer removal in the apical area of curved canals. Sixty-four extracted human mandibular molars with curved mesial roots were instrumented with rotary files and divided into six experimental groups for final rinse: 1EDTA (syringe irrigation with 1mL of 17% ethylenediaminetetraacetic acid (EDTA)), 5EDTA (syringe irrigation with 5mL of 17% EDTA), 1EDTA-P (syringe irrigation with 1mL of 17% EDTA+pumping with gutta-percha point), 5EDTA-P (syringe irrigation with 5mL of 17% EDTA+pumping with gutta-percha point), 1EDTA-EA (syringe irrigation with 1mL of 17% EDTA+EndoActivator) and 5EDTA-EA (syringe irrigation with 5mL of 17% EDTA+EndoActivator). Final rinsing was carried out over 3min. The specimens were split lengthwise and observed under a scanning electron microscope using a score criterion. Comparison among the groups showed statistically significant difference only between the 5EDTA-EA group and the other groups (Kruskal-Wallis and Dunn%26apos;s post-hoc tests, P%26lt;0.05). The combination of 5mL of 17% EDTA and 3mL of 2.5% sodium hypochlorite (NaOCl) with the EndoActivator removed smear layer from the apical area of curved root canals more effectively than the other protocols used.

• 出版日期2014-8