Question 3 of 8
Which of these substances is safe for home teeth whitening?
A: Carbamide peroxide 10%
RIGHT
Explanation: The most common and most studied bleaching agents are carbamide peroxide 10% (used at home with a mouthguard) and hydrogen peroxide 35% (used in the dentist's office). Carbamide peroxide is a mixture of hydrogen peroxide and urea. Products with carbamide peroxide are active for longer (up to 10 hours) and their acidity is reduced to a level where the enamel is not attacked and the tooth is not damaged.
B: Hydrogen peroxide 35%
ERROR
Correct Answer: The most common and most studied whitening substances are carbamide peroxide 10% (used at home with a mouthguard) and hydrogen peroxide 35% (used in the dentist's office). Carbamide peroxide is a mixture of hydrogen peroxide and urea. Products with carbamide peroxide are active for longer (up to 10 hours) and their acidity is reduced to a level where the enamel is not attacked and the tooth is not damaged.