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Questions and Answers
What is the main cause of tooth sensitivity after using in-office bleaching technique with H2O2 and heat?
What is the main cause of tooth sensitivity after using in-office bleaching technique with H2O2 and heat?
- Decrease in enamel hardness
- Penetration of the bleaching agent into enamel and dentine (correct)
- Effect on composite fillings
- Effect on pulp
What effect do bleaching agents have on enamel hardness?
What effect do bleaching agents have on enamel hardness?
- Restore enamel hardness
- Increase enamel hardness
- No effect on enamel hardness
- Decrease enamel hardness (correct)
What may happen when the bleaching agent penetrates the enamel and dentine?
What may happen when the bleaching agent penetrates the enamel and dentine?
- External cervical resorption
- Cervical resorption
- Surface roughening of the restoration
- Transient reduction in pulpal blood flow (correct)
What happens to composite fillings after bleaching?
What happens to composite fillings after bleaching?
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What condition may occur when using H2O2 of more than 30% concentration during bleaching?
What condition may occur when using H2O2 of more than 30% concentration during bleaching?
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