Table 1: Description of analyzed materials.

MaterialKey contentsManufacturer

Tetric EvoCeram
Lot L24180
Filler particles consisting of barium glass, ytterbium trifluoride, mixed oxide and prepolymer, and unspecified dimethacrylate monomers (17 wt%)Ivoclar Vivadent, Schaan, Liechtenstein
Gradia Direct X
Lot 0805142
Fluoroaluminosilicate glass, prepolymerised filler, silica, UDMA, and unspecified dimethacrylate comonomers (23 wt%).GC Co., Tokyo, Japan
Beautifil II
Lot 060854
S-PRG glass filler, fluoride containing fluoro-boro-alumino silicate glass filler particles, TEGDMA, and Bis-GMA (17 wt%)Shofu Inc., Kyoto, Japan
Fuji IX Extra
Lot 0804151
Fluoroaluminosilicate glass, copolymer of acrylic and maleic acid, tartaric acid, and waterGC Co., Tokyo, Japan

S-PRG filler: surface reaction-type prereacted glass ionomer; Bis-GMA: 2,2-bis 4-( -hydroxy- -methacryloxypropoxy)phenyl propane; TEGDMA: triethylene glycol dimethacrylate; UDMA: urethane dimethacrylate.