Effect of Bleaching and Thermocycling on Resin-Enamel Bond Strength

Table 1

Materials, chemical compositions, and manufacturer used in the study.

Material	Components	Manufacturer
Filtek Z350 resin composite	BIS-GMA, BIS-EMA (6), UDMA, and TEGDMA, a nonagglomerated/nonaggregated, 20 nm nanosilica filler, loosely bound agglomerated zirconia/silica nan cluster, consisting of agglomerates of primary zirconia/silica particles with size of 5–20 nm fillers (82% wt)	3M ESPE, Filtek Z350 Universal Restorative Dental Products, St. Paul, USA
Filtek silorane resin composite (P90)	Silane-treated quartz, 3,4-epoxycyclohexylcyclopolymethylsiloxane, yttrium trifluoride, bis-3,4-epoxycyclohexylethyl-phenylmethylsilane, mixture of epoxy functional di- and oligo-siloxane by-products, mixture of alpha substituted by-products, mixture of other byproducts, and mixture of epoxy-mono-silanole byproducts (79% wt)	3M ESPE, Filtek silorane, Dental Products, St. Paul, USA
Scotchbond Etchant	32% phosphoric acid, fumed silica, and water	3M ESPE, Scotchbond Etchant, Dental Products, St. Paul, USA
Adper Single Bond 2	BisGMA, HEMA, dimethacrylates, ethanol, water, a novel photoinitiator system and a methacrylate functional copolymer of polyacrylic and polyitaconic acids, and silica particles	3M ESPE, Adper Single Bond 2 adhesive, Dental Products, St. Paul, USA
Silorane System Adhesive Self-Etch Primer	2-Hydroxyethyl methacrylate (HEMA), bisphenol A diglycidyl ether dimethacrylate (BisGMA), water, ethanol, phosphoric acid-methacryloxy-hexyl esters, silane-treated silica, 1,6-hexanediol dimethacrylate, copolymer of acrylic and itaconic acid, (dimethylamino)ethyl methacrylate, DL-camphorquinone, phosphine oxide	3M ESPE, Dental Products, St. Paul, USA
Silorane System Adhesive Bond	Substituted dimethacrylate, silane-treated silica, triethylene glycol dimethacrylate (tegdma), phosphoric acid methacryloxy-hexyl esters, 1,6-hexanediol dimethacrylate, and DL-camphorquinone	3M ESPE, Dental Products, St. Paul, USA
Opalescence Endo	35% hydrogen peroxide	Ultradent Products Inc., USA

HEMA: 2-hydroxyethyl methacrylate; Bis-GMA: bisphenol A diglycidyl methacrylate; TEGDMA: triethylene glycol dimethacrylate; BIS-EMA: ethoxylated bisphenol A glycol dimethacrylate; UDMA: urethane dimethacrylate.
The “number () and ()” are as the chemical formulation or the part of name of “BIS-EMA” and “Filtek Silorane resin composite” respectively.