Table 1.

Study groups and toothpaste contents

Groups	Product name	Ingredients	Tooth whitening technology used
Group 1	Pepsodent whitening germicheck	Calcium carbonate, water, sorbitol, hydrated silica, sodium lauryl sulphate, potassium nitrate, flavour, sodium monofluorophosphate, perlite, cellulose gum, sodium silicate, benzyl alcohol, sodium saccharin, CI 74160, CI 74260, CI 77891	Perlite (abrasive)
Group 2	Closeup diamond Attraction Whitening	Sorbitol, water, hydrated silica, sodium lauryl sulphate PEG-32, flavour, cellulose g, trisodium phosphate, sodium fluoride, sodium saccharin, PVM/MA copolymer, C174160, Mica/Cl77019, limonene, CI 77891	Blue covarine (optical pigment)
Group 3	Colgate Visible White Plus Shine	Silica, sorbitol, glycerine, polyethylene glycol, pyrophosphate, sodium tripolyphosphate, tetrapotassium pyrophosphate, sodium lauryl sulphate, flavour, cocamidopropyl betaine, sodium carboxymethyl cellulose, sodium monofluorophosphate, xanthan, sodium saccharin in aqueous base	Sodium tripolyphosphate (chemical)
Group 4	Colgate Charcoal Clean	Sorbitol, water, silica, sodium lauryl sulphate, flavour, cocamidopropyl betaine, polyethylene glycol 600, sodium carboxymethyl cellulose, sodium saccharin, sodium fluoride, charcoal, benzyl alcohol, eugenol	Activated charcoal (abrasive)
Group 5-control	Pepsodent 2 in 1	Water, sorbitol, calcium carbonate, hydrated silica, sodium lauryl sulphate, flavour, PEG-32, sodium monofluorophosphate, cellulose gum, trisodium phosphate, benzyl alcohol, sodium saccharin, CI 77891, CI 74160, limonene	Nonwhitening toothpaste