Teeth Whitening Professional In-Office Whitening Procedures 2

Question 1

What does 'power bleaching' refer to in dentistry?

Accepted Answer

In-office whitening using high-concentration peroxide, often with light or heat activation

Answer

Power bleaching is the clinical term for chairside whitening using high-concentration gel accelerated by a light or heat source under professional supervision.

Question 2

Why might a dentist recommend internal (non-vital) bleaching for a single darkened tooth?

Accepted Answer

The tooth has had a root canal, and the stain originates inside the pulp chamber

Answer

Non-vital (internally darkened) teeth are bleached from inside the pulp chamber after root canal treatment because the stain source is within the tooth.

Question 3

The 'walking bleach' technique involves placing which agent inside the pulp chamber between appointments?

Accepted Answer

Sodium perborate mixed with water or hydrogen peroxide

Answer

Sodium perborate (with or without hydrogen peroxide) is sealed inside the pulp chamber and slowly releases oxygen to bleach the tooth from within between visits.

Question 4

After in-office whitening, the dentist typically advises the patient to avoid colored foods and drinks for how long?

Accepted Answer

24–48 hours

Answer

The enamel surface is more porous and susceptible to re-staining immediately after whitening, so the 24–48-hour 'white diet' minimizes early chromogen uptake.

Question 5

Which patient condition is an absolute contraindication for in-office whitening?

Accepted Answer

Untreated active caries (cavities)

Answer

Active caries must be treated before whitening because peroxide can penetrate through decayed enamel directly to the pulp, causing irreversible pulp damage.

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Teeth Whitening Professional In-Office Whitening Procedures 2