Table 1 The composition and manufacturers of the materials tested in this study
Group | Material/Shade | Polymer | Filler | Manufacturer |
|---|---|---|---|---|
GRA | Gradia, A2 | UDMA, methacrylate copolymer | Microfine ceramic/prepolymerized filler, 75% by mass | GC (Tokyo, Japan) |
VSC | VarseoSmile Crown Plus, A2 | Esterification products of 4.4’-isopropylidiphenol, ethoxylated and 2-methylprop-2enoic acid. Silanized dental glass, methyl benzoylformate, diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide. | Total content of inorganic fillers (particle size 0.7 μm) is 30–50% by mass. | BEGO (Bremen, Germany) |
VBM | Vitablocs Mark II, A2 | - | Feldspathic crystalline particles (4 𝜇m) in glassy matrix | Vita Zahnfabrik, Germany |