Analysis of Physical and Mechanical Properties of Universal Composites under Different Types of Polishing before and after Acid Challenge
Table 1
Identification of composite resins and surface sealants with regard to their classification and chemical composition.
Material/manufacturer/color
Classification
Chemical composition
Estelite omega/Tokuyama, Japan/EB1
Supranano composite
Bis-GMA (bisphenol A-glycidyl methacrylate) and TEGDMA (triethylene glycol dimethacrylate) monomers; silica-zirconia filler, with spherical morphology and average inorganic particle size of 200 nm (82% by weight or 71% by volume); initiators; stabilizers and pigments
Palfique/Tokuyama, Japan/A2 Esmalte
Supranano composite
Bis-GMA and TEGDMA monomers; silica-zirconia filler, with spherical morphology and an average inorganic particle size of 200 nm (82% by weight or 71% by volume); initiators; stabilizers and pigments
Filtek™ Z350 XT/3M ESPE, USA/B2E
Nanoparticulate composite
Bis-GMA, UDMA (urethanes dimethacrylate), TEGDMA, and Bis-EMA (bisphenol hydroxyethyl methacrylate). Silica filler with size 20 nm nonagglomerated/nonaggregated, zirconia with size 4–11 nm nonagglomerated/nonaggregated and agglomerated, clusters of aggregated zirconia/silica particles (combination of silica particles with 20 nm and Zirconia with 4–11 nm). The inorganic particle loading represents about 78.5% by weight (63.3% by volume)
