Teeth Whitening Teeth Whitening 3

Question 1

Which type of tooth discoloration CANNOT be corrected by bleaching agents?

Accepted Answer

Discoloration from a dead (non-vital) tooth

Answer

Non-vital (dead) teeth require internal bleaching or restorative options because external bleaching agents cannot penetrate to the source of the discoloration.

Question 2

What does 'walking bleach' technique refer to in dentistry?

Accepted Answer

Placing bleaching agent inside a root-treated tooth between appointments

Answer

The walking bleach technique involves sealing a bleaching agent inside the pulp chamber of a non-vital tooth to whiten it between dental visits.

Question 3

Which shade guide is most commonly used by dentists to objectively measure whitening progress?

Accepted Answer

VITA classical shade guide

Answer

The VITA classical shade guide is the industry standard used to assess and document tooth color before and after whitening.

Question 4

Dental veneers placed before whitening can cause a cosmetic problem because:

Accepted Answer

Veneers do not respond to bleaching and will appear darker than whitened natural teeth

Answer

Porcelain and composite veneers do not bleach, so if natural teeth are whitened afterward, the veneers will appear mismatched and darker by comparison.

Question 5

At what concentration does hydrogen peroxide in whitening products typically require a prescription or dental supervision in the US?

Accepted Answer

Above 6%

Answer

Products containing more than 6% hydrogen peroxide are generally classified as requiring dental supervision or a prescription in many regulatory frameworks.

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Teeth Whitening Practice Test

Teeth Whitening Teeth Whitening 3