Effects of different surface treatments of zirconia on the bond strength of self-adhesive resinous cement. Issue 1 (2nd January 2017)

• Record Type: Journal Article
• Authors: Zanatta, Rayssa Ferreira; Esper, Maria Ângela Lacerda Rangel; Pucci, Cesar Rogério; Borges, Alessandra Bühler; Torres, Carlos Rocha Gomes
• Is Part Of: Journal of adhesion science and technology. Volume 31:Issue 1(2017)
• Page Start: 21
• Page End: 30
• Publication Date: 2017-01-02
• Subjects: Zirconia -- Nd:YAG Laser -- surface treatments -- bond strength -- self-adhesive cement; Adhesion -- Periodicals; Adhesives -- Periodicals; 668.3
• DOI: 10.1080/01694243.2016.1197085
• Languages: English
• ISSNs: 0169-4243

Abstract

Abstract: Purpose: The aim of this study was to evaluate the effects of different zirconia surface treatments on the bond strength of two self-adhesive resinous cements (SARC). Methods: Two hundred and eight cylindrical specimens were obtained from Y-TZP zirconia (half with diameter 3.2 mm and half with 4.8 mm). After sintering and polishing, specimens were divided into four groups ( n = 26), according to surface treatment: Control (no treatment); Sandblasting (Al2 O3 particles); Rocatec (Al2 O3 particles, tribochemical silica coating and silane application); Laser (Nd: YAG laser: 20 Hz, 100 mJ, 0.2 J/cm²). The surface roughness (Ra) was evaluated after the surface treatments, and the groups were divided into two subgroups ( n = 13), according to the SARC tested: RelyX U200 and Bifix SE. The 2.2-mm cylinders were bonded to 4.8-mm cylinders and stressed until failure under shear using a universal testing machine. Bond strength and Ra were analyzed using ANOVA, and Tukey's test ( α = 0.05). Results: Surface treatment was significant ( p < 0.0001), but cement type ( p = 0.73) was not. Related to roughness, significant differences were found for the treatment type ( p < 0.0001), with laser being the treatment with higher Ra values. Conclusions: Nd:YAG laser produced a rougher surface and a higher bond strength compared with sandblasting, silicatization, and control groups.