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Table 1 Materials used in this study according to source, composition and batch, based on information supplied by the manufacturers, safety datasheets and solutions prepared in laboratory

From: Antioxidant pre-treatments are able to reduce waiting time for restorative treatment after dental bleaching: a microtensile bond strength exploratory study

Product Manufacturer Composition Batch
Filtek™ Z250 (A3 color) 3M ESPE, USA Bis-GMA, UDMA, TEGDMA, Bis-EMA, zirconia and silica filler particles (60 wt%) NA13481
Grape seed extract (100 mg vegetable capsules) Solgar Inc., USA Microcrystalline cellulose and vitis vinifera extract containing 90% polyphenols 223113-05
Green tea sachets
(Tetley Green Tea Classic)
Tata Global Beverages GB Ltd. UK Green tea leaves containing 0.62 mg/mL of flavanoids 191693
16% Opalescence PF Regular Ultradent Products, USA 16% carbamide peroxide, potassium nitrate, sodium fluoride and water BGP3
Optibond™ FL Kerr, Italy Primer: HEMA, GPDM, MMEP, ethanol, water and initiators 6732914
Adhesive: Bis-GMA, HEMA, GDMA, barium aluminosilicate, sodium hexafluorosilicate and fumed silica, initiators
Placebo gel Fabricated at IUEM, Portugal 93.8% water, 5% glycerine and 1.2% carbopol
Scotchbond™ Etchant 3M ESPE, USA Water, 34% ortophosphoric acid, polyethylene glycol, synthetic amorphous silica, aluminium oxide 4785595
Sodium ascorbate Fabricated at IUEM, Portugal Sodium ascorbate 10%, carbopol 934 (2.5%) and triethanolamine
(pH = 7)
  1. pH values were measured using a bench pH meter (Crison Basic 20 + , Crison Instruments, Spain)
  2. Bis-GMA bisphenol-A-glycidyl dimethacrylate, GDMA glycidyl dimethacrylate, GPDM glycerophosphate dimethacrylate, HEMA hydroxy ethyl methacrylate, N/A not available in the information supplied, MMEP mono(2-methacryloyloxy) ethyl phthalate, TEGDMA triethylene glycol dimethacrylate, UDMA urethane dimethacrylate