Table 1. The composite resins investigated and their composition.
| Brand | Manufacturer | Type | Composition |
|---|---|---|---|
| Tetric N-Ceram | IvoclarVivadent AG, Schaan, Liechtenstein | Nano-hybrid | Barium glass 63.5 wt%, prepolymer 17 wt% UDMA, bis-GMA, bis-EMA |
| Tetric Flow | IvoclarVivadent AG, Liechtenstein | Flowable | UDMA, bis-GMA, Bariumglass 63 wt% |
| Gradia LoFlo | GC Corp., Tokyo, Japan | Flowable | UDMA, TEGDMA, Strontium glass 69 wt%, 50 vol% |
| Tetric EvoCeram Bulk Fill | IvoclarVivadent AG, Liechtenstein | Bulk-fill | Barium glass filler 80 wt%, 60 vol% Dimethacrylate co-monomers |
| SDR | Dentsply, York, PA | Bulk-fill | TEGDMA, EBADMA, 68 wt%, 44 vol%, Barium borosilicateglass |
| Alert | Jeneric/Pentron, Wallingford, CT | Condensable | Filler (conventional and micro glass fiber) 84 wt%, 62 vol% |
| everX Posteior | GC Corp, Tokyo, Japan | Short fibre composite | bis-GMA, PMMA, TEGDMA, Shot E-glass fiber filler, Barium glass 74.2 wt%, 53.6 vol% |
PMMA, polymethylmethacrylate; MMA, methylmethacrylate; bis-GMA, bisphenol-A-glycidyldimethacrylate; TEGDMA, triethylene glycol dimethacrylate; UDMA, urethane dimethacrylate; EBADMA, EthoxylatedBisphenol A dimethacrylate; bis-EMA, Ethoxylatedbisphenol-A-dimethacrylate; wt%, weight percentage; vol%, volume percentage.