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

A home kit with extra-strength strips

Answer

An ultrasonic device that blasts stains off enamel

Answer

A laser that vaporizes stain molecules

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

Internal bleaching is faster than external for all cases

Answer

The patient has severe gum recession around that tooth

Answer

Surface whitening is contraindicated if a crown is present

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

Calcium hydroxide paste

Answer

Zinc oxide eugenol cement

Answer

Chlorhexidine gel

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

5–10 minutes

Answer

One week

Answer

One month

Question 5

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

Accepted Answer

Untreated active caries (cavities)

Answer

Mild enamel fluorosis

Answer

Coffee and tea staining

Answer

Recent dental crown placement

Question 6

What is 'rebound' in the context of teeth whitening?

Accepted Answer

A slight darkening of teeth in the weeks following whitening as enamel rehydrates

Answer

The bounce-back of peroxide bubbles during application

Answer

A patient's allergic reaction to whitening gel

Answer

The reactivation of old stains by acidic foods