Adhesive systems effect over bond strength of resin-infiltrated and de/remineralized enamel [version 1; peer review: 2 approved]
Alessandra Buhler Borges,
Amjad Abu Hasna,
Amanda Guedes Nogueira Matuda,
Stephanie Ribeiro Lopes,
Ana Paula Valente Pinho Mafetano,
Aline Arantes,
Angélica Ferreira Duarte,
Daphne Camara Barcellos,
Carlos Rocha Gomes Torres,
Cesar Rogério Pucci
Affiliations
Alessandra Buhler Borges
Department of Restorative Dentistry, Operative Dentistry, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, São Paulo, 12245-000, Brazil
Amjad Abu Hasna
Department of Restorative Dentistry, Endodontic Division, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, São Paulo, 12245-000, Brazil
Amanda Guedes Nogueira Matuda
Department of Restorative Dentistry, Operative Dentistry, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, São Paulo, 12245-000, Brazil
Stephanie Ribeiro Lopes
Department of Restorative Dentistry, Operative Dentistry, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, São Paulo, 12245-000, Brazil
Ana Paula Valente Pinho Mafetano
Department of Restorative Dentistry, Operative Dentistry, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, São Paulo, 12245-000, Brazil
Aline Arantes
Department of Restorative Dentistry, Operative Dentistry, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, São Paulo, 12245-000, Brazil
Angélica Ferreira Duarte
Department of Restorative Dentistry, Operative Dentistry, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, São Paulo, 12245-000, Brazil
Daphne Camara Barcellos
Department of Restorative Dentistry, Operative Dentistry, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, São Paulo, 12245-000, Brazil
Carlos Rocha Gomes Torres
Department of Restorative Dentistry, Operative Dentistry, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, São Paulo, 12245-000, Brazil
Cesar Rogério Pucci
Department of Restorative Dentistry, Operative Dentistry, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, São Paulo, 12245-000, Brazil
Background: The purpose of this study was to evaluate the effect of different bonding agents on bond-strength to demineralized enamel after remineralizing treatments and resin infiltration. Methods: Buccal enamel of 120 bovine incisors was polished and then were divided into five experimental groups: SE (sound enamel); DE (demineralized enamel); AS (demineralized enamel immersed in artificial saliva for eight weeks); NaF (demineralized enamel treated with 0.05% sodium fluoride solution (one minute) for eight weeks); Ic (demineralized enamel infiltrated with a low-viscosity resin (Icon-DGM). These groups were subdivided according to adhesive system used: self-etching adhesive Adper Easy One (3M/ESPE) and etch-and-rinse adhesive Single Bond (3M/ESPE). The composite resin blocks were fabricated using a Teflon matrix. A thermomechanical cycling machine was used to carry out the artificial aging of the specimens and thus were sectioned into sticks. The microtensile tests were performed using a universal testing machine at a cross-head speed of 1 mm/min. Data (in MPa) were subjected to two-way ANOVA and Tukey’s tests (5%). Results: Significant differences were found for both factors tested and interactions (p<0.05). Tukey’s test results of µTBS (mean ± SD) were: etch-and-rinse SE (28.79±3.93); DE (30.41±7.22); AS (29.03±3.33); NaF (29.81±4.06)a; Ic (29.47±5.5); and self-etching SE (30.37±6.96); DE (14.62±4.47); AS (9.79±2.32); NaF (9.36±2.31); Ic (30.78±8.68). Conclusions: Resin infiltration did not affect the bond strength of demineralized enamel for both adhesive systems tested. For etch-and-rinse adhesive, no differences were observed for the tested groups. For self-etching adhesive, only the resin-infiltrated group showed similar bond strength to sound enamel. Both etch-and-rinse and self-etching adhesive systems can be used in resin-infiltrated enamel, if a composite restoration needs to be further performed. In enamel that has undergone the de/remineralization process, the use of a total-etch adhesive might be preferable for the restorative procedure.
