Compatibility of silorane composite repaired with methacrylate-based restorative systems

Author(s)

Coffone, Bruno Turci ^[1] ; Chaves, Fernanda Oliveira ^[1] ; Bruschi Alonso, Roberta Caroline ^[1] ; Di Hipolito, Vinicius ^[1] ; Perlatti D'Alpino, Paulo Henrique ^[1]

Affiliation

^[1] Anhanguera Univ Sao Paulo UNIAN SP, Sch Dent, Biomat Res Grp, BR-02071013 Sao Paulo - Brazil

• Document type: Journal article
• Source: JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY; v. 28, n. 16, p. 1579-1591, AUG 18 2014.
• Web of Science Citations: 2

Abstract

The aim of this study was to evaluate the repair bond strength of silorane composites using either the silorane or methacrylate-based restorative systems. Expired silorane composite was used as the substrate material in all experimental groups. Silorane blocks (5 x 5 x 4 mm) were fabricated and stored at 37 degrees C for 24 h. Six experimental groups were developed according to the repair: I-silorane composite (no intermediary); II-P90 Bond/Silorane; III-P90 Adhesive System (primer/bond)/silorane; IV-P90 bond/Scotchbond Universal/methacrylate composite (Filtek P60); V-Scotchbond Universal/methacrylate; and VI-silane/Adper Single Bond 2/methacrylate. The repaired blocks were stored for 24 h at 37 degrees C, and then sectioned, yielding stick-shaped specimens (0.5 mm(2)) that were tested in tensile (0.5 mm/min). The results were analyzed using ANOVA/Tukey test (alpha = 0.05). The interfacial micromorphology and nanoleakage were also analyzed under SEM. Scotchbond Universal/methacrylate composite, either associated with the P90 bond or not, exhibited similar bond strength to that of P90 Adhesive System/silorane composite. Scotchbond Universal either associated with the P90 Bond or not to repair the silorane allowed no pre-testing failures. The worst scenarios were repairing the silorane with no intermediary (G-I) or combination silane/Adper Single Bond 2/methacrylate composite (G-VI) that presented significantly lower bond strengths and higher incidences of pre-failure testing. The importance of the silane was not confirmed. Characteristic micromorphology and no signs of nanoleakage were identified in all experimental groups. The silane-containing, phosphorylated methacrylate-based adhesive associated with a methacrylate composite was proven to reliably repair the expired composite in a similar way to that of the application of dedicated silorane adhesive. (AU)

• FAPESP's process: 12/05405-6 - Repair of silorane composite restoration: compatibility with methacrylate-based restorative systems
• Grantee: Bruno Turci Coffone
• Support Opportunities: Scholarships in Brazil - Scientific Initiation