Kléber Campioni Dias1, Carlos José Soares2, Liviu Steier3, Marco Aurélio Versiani1, Fuad Jacob Abi Rached-Júnior4, Jesus Djalma Pécora1, Yara Terezinha Correa Silva-Sousa4, Manoel Damião de Sousa-Neto5. 1. Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil. 2. Department of Restorative Dentistry, Dental School of Uberlândia, Federal University of Uberlândia, Uberlândia, Brazil. 3. Department of Endodontics, Warwick Dentistry, The University of Warwick, Coventry, United Kingdom. 4. Department of Endodontics, School of Dentistry, University of Ribeirão Preto, Ribeirão Preto, Brazil. 5. Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil. Electronic address: sousanet@forp.usp.br.
Abstract
INTRODUCTION: This study compared the bond strength, interfacial ultrastructure, and tag penetration of resin-based sealers applied to smear-free radicular dentin using 70% isopropyl alcohol as the active final rinse. METHODS: Eighty root canals were prepared and assigned to 2 groups (n = 40) according to the drying protocol: paper points or 70% isopropyl alcohol. Then, roots were divided into 4 subgroups (n = 10) with respect to the sealer and obturation material: AH Plus (Dentsply De Trey GmbH, Konstanz, Germany) and gutta-percha (AH/GP), Hybrid Root SEAL (Sun Medical, Tokyo, Japan) and gutta-percha (HR/GP), Epiphany SE (Pentron Clinical Technologies, Wallingford, CT) and gutta-percha (EP/GP), and Epiphany SE and Resilon (EP/RS). Roots were sectioned, and the push-out test was performed. Failure modes were examined under stereomicroscopy and sealer penetration into the dentinal tubules under scanning electron microscopy. Data were statistically analyzed by 2-way analysis of variance post hoc Tukey tests with a significant level of 5%. RESULTS: Overall, canals dried with isopropyl alcohol showed significantly higher bond strength values (2.11 ± 1.74 MPa) than with paper points (1.81 ± 1.73 MPa) (P < .05). The HR/GP group showed lower bond strength than the AH/GP group (P < .05) but higher than the EP/GP and EP/RS groups (P < .05). The most frequent type of failure was cohesive in the AH/GP and HR/GP groups and adhesive in the EP/GP and EP/RS groups. Scanning electron microscopic evaluation revealed better adaptation of the adhesive interface in the AH/GP and HR/GP groups in comparison with the EP/GP and EP/RS groups. CONCLUSIONS: A final rinse with EDTA and 70% isopropyl alcohol improved the bond strength and penetration of the sealers into dentinal tubules of the root.
INTRODUCTION: This study compared the bond strength, interfacial ultrastructure, and tag penetration of resin-based sealers applied to smear-free radicular dentin using 70% isopropyl alcohol as the active final rinse. METHODS: Eighty root canals were prepared and assigned to 2 groups (n = 40) according to the drying protocol: paper points or 70% isopropyl alcohol. Then, roots were divided into 4 subgroups (n = 10) with respect to the sealer and obturation material: AH Plus (Dentsply De Trey GmbH, Konstanz, Germany) and gutta-percha (AH/GP), Hybrid Root SEAL (Sun Medical, Tokyo, Japan) and gutta-percha (HR/GP), Epiphany SE (Pentron Clinical Technologies, Wallingford, CT) and gutta-percha (EP/GP), and Epiphany SE and Resilon (EP/RS). Roots were sectioned, and the push-out test was performed. Failure modes were examined under stereomicroscopy and sealer penetration into the dentinal tubules under scanning electron microscopy. Data were statistically analyzed by 2-way analysis of variance post hoc Tukey tests with a significant level of 5%. RESULTS: Overall, canals dried with isopropyl alcohol showed significantly higher bond strength values (2.11 ± 1.74 MPa) than with paper points (1.81 ± 1.73 MPa) (P < .05). The HR/GP group showed lower bond strength than the AH/GP group (P < .05) but higher than the EP/GP and EP/RS groups (P < .05). The most frequent type of failure was cohesive in the AH/GP and HR/GP groups and adhesive in the EP/GP and EP/RS groups. Scanning electron microscopic evaluation revealed better adaptation of the adhesive interface in the AH/GP and HR/GP groups in comparison with the EP/GP and EP/RS groups. CONCLUSIONS: A final rinse with EDTA and 70% isopropyl alcohol improved the bond strength and penetration of the sealers into dentinal tubules of the root.
Authors: Bruno Piazza; Melissa Esther Rivera-Peña; Murilo Priori Alcalde; Bruno Carvalho de Vasconcelos; Marco Antonio Húngaro Duarte; Ivaldo Gomes de Moraes; Rodrigo Ricci Vivan Journal: Eur Endod J Date: 2017-12-22
Authors: José Pedro Martinho; Sara França; Siri Paulo; Anabela Baptista Paula; Ana Sofia Coelho; Ana Margarida Abrantes; Francisco Caramelo; Eunice Carrilho; Carlos Miguel Marto; Maria Filomena Botelho; Henrique Girão; Manuel Marques-Ferreira Journal: Materials (Basel) Date: 2020-12-01 Impact factor: 3.623