PMID- 32515428 OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - Oral Health Prev Dent JT - Oral Health and Preventive Dentistry IS - 1757-9996 (Electronic) IP - 1 VI - 18 PST - epublish DP - 2020 PG - 555-562 LA - en TI - Comparative Effect of Rotary Microbrush Combined with Different Chemical Irrigants on Root Dentin Microhardness, Roughness and Bond Strength to an Epoxy-based Sealer LID - 10.3290/j.ohpd.a44692 [doi] FAU - Barbosa, Ana Flávia Simões AU - Barbosa A FAU - Mello, Larissa Malheiro de AU - Mello L FAU - Teixeira, Francine Guedes AU - Teixeira F FAU - Rached-Júnior, Fuad Jacob Abi AU - Rached-Júnior F FAU - Trindade, Thais Fantinato AU - Trindade T FAU - Raucci-Neto, Walter AU - Raucci-Neto W CN - OT - EDTA OT - endodontics OT - epoxy resin based root canal sealer OT - root canal irrigantsaler AB - Purpose: This study evaluated the effect of 17% EDTA, 10% citric acid (CA), and 2% chlorhexidine (CHX) activated with a rotary microbrush (CanalBrush) on root dentin microhardness, roughness, and epoxy-based sealer bond strength. Materials and Methods: One hundred sixty single-rooted bovine incisors were instrumented and divided into 8 groups according to treatment: 1. 17% EDTA; 2. 17% EDTA+2% CHX; 3. 10% CA; 4. 10% CA+2% CHX; 5. 17% EDTA with CanalBrush; 6. 17% EDTA+2% CHX with CanalBrush; 7. 10% CA with CanalBrush; and 8. 10% CA+2% CHX with CanalBrush. Ten roots in each group were split into halves and submitted to microhardness and roughness analyses (n = 10). Following endodontic filling with AH Plus sealer, 10 roots in each group underwent push-out bond strength testing (n = 10). Data were analyzed using two-way ANOVA and Tukey's tests (α = 0.05). Results: All groups had similar microhardness values (p > 0.05) which was higher in the apical third than in the middle and cervical thirds (p < 0.05). The CanalBrush groups had higher roughness than the no-activation groups (p < 0.05), with significantly higher roughness in the cervical third than in the apical third (p < 0.05). All groups exhibited similar bond strength (p > 0.05), with the cervical third being higher, followed by the middle and apical thirds (p < 0.05). Conclusions: Microbrush activation had a direct impact on dentin roughness and did not influence the dentin microhardness or the retention of epoxy-based sealer to the root canal. AID - 842332