title: Effect of Enamel and Dentin Surface Treatment on the Self-Adhesive Resin Cement Bond Strength.
abstract: The aim of this study was to evaluate the effect of enamel and dentin surface treatment on the micro-shear bond strength of self-adhesive cement. Seventy-two extracted third molars had their crowns embedded in acrylic resin and worn to obtain a flat enamel or dentin surface. The enamel and dentin specimens were randomly assigned to 8 groups (n=12) that were based on surface treatment (11.5% polyacrylic acid solution or no treatment), substrate condition (wet or dry) and storage period (1 day or 90 days), and treated accordingly. Cylinders (1 × 1 mm) were fabricated using self-adhesive resin cement (RelyX U200) following the manufacturer's instructions. The specimens were stored in distilled water at 37 °C for either 1 day or 90 days and subjected to micro-shear bond strength test (EMIC DL 2000 at 0.5 mm/min). After this, the failure type of the specimens was determined. Data were subjected to statistical analysis (a=0.05). According to the results, the 11.5% polyacrylic acid application decreased the bond strength in both enamel and dentin samples. The moist groups showed higher bond strength than the dry ones, regardless of the substrate and surface treatment. Storage period did not influence bond strength. In conclusion, surface treatment with 11.5% polyacrylic acid and absence of moisture decreased the bond strength of the resin-cement (RelyU200), regardless of the storage period.
authors.affiliation: Graduate Program in Dentistry, Department of Operative Dentistry, Universidade Positivo, Curitiba, PR, Brazil.
authors.forename: Amanda Mahmmad
authors.initials: AM
authors.lastname: Mushashe
authors.affiliation: Graduate Program in Dentistry, Department of Operative Dentistry, Universidade Positivo, Curitiba, PR, Brazil.
authors.forename: Carla Castiglia
authors.initials: CC
authors.lastname: Gonzaga
authors.affiliation: Graduate Program in Dentistry, Department of Operative Dentistry, Universidade Positivo, Curitiba, PR, Brazil.
authors.forename: Leonardo Fernandes da
authors.initials: LF
authors.lastname: Cunha
authors.affiliation: Department of Operative Dentistry, Endodontics and Dental Materials, Bauru Dental School, USP - Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Adilson Yoshio
authors.initials: AY
authors.lastname: Furuse
authors.affiliation: Graduate Program in Dentistry, Department of Operative Dentistry, Universidade Positivo, Curitiba, PR, Brazil.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Moro
authors.affiliation: Graduate Program in Dentistry, Department of Operative Dentistry, Universidade Positivo, Curitiba, PR, Brazil.
authors.forename: Gisele Maria
authors.initials: GM
authors.lastname: Correr
mesh_terms: D003743:Dental Enamel; D003804:Dentin; D019279:Resin Cements / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D019279:Resin Cements