title: Effect of root canal filling techniques on the bond strength of epoxy resin-based sealers.
abstract: The aim of this study was to evaluate the effects of different root canal filling techniques on the bond strength of epoxy resin-based sealers. Sixty single-rooted canines were prepared using ProTaper (F5) and divided into the following groups based on the root filling technique: Lateral Compaction (LC), Single Cone (SC), and Tagger Hybrid Technique (THT). The following subgroups (n = 10) were also created based on sealer material used: AH Plus and Sealer 26. Two-millimeter-thick slices were cut from all the root thirds and subjected to push-out test. Data (MPa) was analyzed using ANOVA and Tukey's test (α = 0.05). The push-out values were significantly affected by the sealer, filling technique, and root third (p < 0.05). AH Plus (1.37 ± 1.04) exhibited higher values than Sealer 26 (0.92 ± 0.51), while LC (1.80 ± 0.98) showed greater bond strength than THT (1.16 ± 0.50) and SC (0.92 ± 0.25). The cervical (1.45 ± 1.14) third exhibited higher bond strength, followed by the middle (1.20 ± 0.72) and apical (0.78 ± 0.33) thirds. AH Plus/LC (2.26 ± 1.15) exhibited the highest bond strength values, followed by AH Plus/THT (1.32 ± 0.61), Sealer 26/LC (1.34 ± 0.42), and Sealer 26/THT (1.00 ± 0.27). The lowest values were obtained with AH Plus/SC and Sealer 26/SC. Thus, it can be concluded that the filling technique affects the bond strength of sealers. LC was associated with higher bond strength between the material and intra-radicular dentine than THT and SC techniques.
authors.affiliation: School of Dentistry, Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brazil.
authors.forename: Fuad Jacob Abi
authors.initials: FJ
authors.lastname: Rached-Júnior
authors.affiliation: School of Dentistry, Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brazil.
authors.forename: Angélica Moreira
authors.initials: AM
authors.lastname: Souza
authors.affiliation: School of Dentistry, Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brazil.
authors.forename: Luciana Martins Domingues
authors.initials: LM
authors.lastname: Macedo
authors.affiliation: School of Dentistry, Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brazil.
authors.forename: Walter
authors.initials: W
authors.lastname: Raucci-Neto
authors.affiliation: School of Dentistry, Universidade Positivo, Curitiba, PR, Brazil.
authors.forename: Flares
authors.initials: F
authors.lastname: Baratto-Filho
authors.affiliation: School of Dentistry, Universidade Positivo, Curitiba, PR, Brazil.
authors.forename: Bruno Marques
authors.initials: BM
authors.lastname: Silva
authors.affiliation: School of Dentistry, Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brazil.
authors.forename: Yara Teresinha Corrêa
authors.initials: YT
authors.lastname: Silva-Sousa
mesh_terms: D000704:Analysis of Variance; D001729:Bismuth / Q000737:chemistry; D002126:Calcium Hydroxide / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods*; D003786:Dental Pulp Cavity / Q000187:drug effects; D019232:Dental Restoration Failure; D003804:Dentin / Q000187:drug effects; D004853:Epoxy Resins / Q000737:chemistry*; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D008422:Materials Testing; D012016:Reference Values; D015203:Reproducibility of Results; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation / Q000379:methods*; D013499:Surface Properties / Q000187:drug effects
chemical_list: D004853:Epoxy Resins; D012387:Root Canal Filling Materials; C080620:Sealer 26; C534916:epoxy resin-based root canal sealer; D006171:Gutta-Percha; D002126:Calcium Hydroxide; D001729:Bismuth