Table 1.

Restorative Materials and Adhesive System Used in the Study

Material	Composition	Filler loading	Manufacturer
SonicFill	Bis-GMA, Bis-EMA, EBPADMA, TEGDMA Silicon dioxide modified dimethacrylate aminoformate"。	81.3 wt% (65.5 vol%)	Kerr, Brea, CA USA
Beautifil II	Bis-GMA, TEGDMA Multifunctional glass filler, Surface prereacted glass-ionomer filler based on aluminofluoro-borosilicate glass	83.3 wt% (68.6 vol%)	Shofu, Tokyo, Japan
Clearfil SE-Bond	Primer: MDP, HEMA, dimethacrylate monomer, water, catalyst Bond: MDP, HEMA, dimethacrylate monomer, microfiller, catalyst	Kuraray, Tokyo, Japan

Abbreviations: Bis-GMA bisphenol-a-glycidyl dimethacrylate, Bis-EMA ethoxylated bisphenol-a-glycol dimethacrylate, EBPADMA ethoxylated bisphenol A dimethacrylate, TEGDMA triethylene glycol dimethacrylate,MDPMedronic Acid, HEMA 2-Hydroxyethyl methacrylate