title: Silanated Surface Treatment: Effects on the Bond Strength to Lithium Disilicate Glass-Ceramic.
abstract: The aim of this study was to evaluate the effect of silanization protocols on the bond strength of two resin cements to a lithium disilicate glass-ceramic. Thirty-two ceramic discs were assigned to 2 groups (n=16): G1 - dual-cured resin cement and G2 - light-cured resin cement. Four subgroups were evaluated according to the used silanization protocol. The glass-ceramic was etched with 10% hydrofluoric acid for 20 s and silane was applied for 1 min, as follows: CTL - according to the manufacturer's instructions; HA - dried with hot air; NWA - washed and dried with water and air at room temperature; HWA - washed and dried with hot water and hot air. Thereafter, adhesive was applied and light-cured for 20 s. Silicon molds were used to prepare resin cement cylinders (1x1 mm) on the ceramic surface. The specimens were stored in deionized water at 37 °C for 48 h and subjected to a micro-shear test. The data were submitted to statistical analysis (?#61537;=0.05). Group G1 showed higher bond strengths than G2, except for the CTL and NWA subgroups. Differences as function of the silanization protocol were only observed in G1: HWA (25.13±6.83)≥HA (22.95±7.78)≥CTL(17.44±7.24) ≥NWA(14.63±8.76). For G2 there was no difference among the subgroups. In conclusion, the silanization protocol affected the resin cement/ceramic bond strengths, depending on the material. Washing/drying with hot water and/or hot air increased only the bond strength of the dual-cured resin cement.
authors.affiliation: Graduate Program in Dentistry, Department of Operative Dentistry, UP - Positivo University, Curitiba, PR, Brazil.
authors.forename: Samantha Schaffer Pugsley
authors.initials: SS
authors.lastname: Baratto
authors.affiliation: Graduate Program in Dentistry, Department of Operative Dentistry, UP - Positivo University, Curitiba, PR, Brazil.
authors.forename: Denis Roberto Falcão
authors.initials: DR
authors.lastname: Spina
authors.affiliation: Graduate Program in Dentistry, Department of Operative Dentistry, UP - Positivo University, Curitiba, PR, Brazil.
authors.forename: Carla Castiglia
authors.initials: CC
authors.lastname: Gonzaga
authors.affiliation: Graduate Program in Dentistry, Department of Operative Dentistry, UP - Positivo University, 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, UP - Positivo University, Curitiba, PR, Brazil.
authors.forename: Flares
authors.initials: F
authors.lastname: Baratto Filho
authors.affiliation: Graduate Program in Dentistry, Department of Operative Dentistry, UP - Positivo University, Curitiba, PR, Brazil.
authors.forename: Gisele Maria
authors.initials: GM
authors.lastname: Correr
mesh_terms: D002516:Ceramics; D003776:Dental Porcelain / Q000737:chemistry*; D005898:Glass; D008422:Materials Testing; D012821:Silanes / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D012821:Silanes; C493120:lithia disilicate; D003776:Dental Porcelain