Teeth Whitening Professional In-Office Whitening Procedures

Question 1

What is the typical concentration of hydrogen peroxide used in professional in-office whitening treatments?

Accepted Answer

25–40%

Answer

3–6%

Answer

10–15%

Answer

50–60%

Question 2

Before applying in-office whitening gel, why does the clinician place a resin or liquid dam on the gingiva?

Accepted Answer

To protect soft tissue from chemical burns caused by high-concentration peroxide

Answer

To speed up the bleaching reaction at the gum line

Answer

To hold the lip retractor in place

Answer

To prevent saliva from diluting the whitening agent

Question 3

Which light-activated in-office whitening system uses a plasma arc lamp?

Accepted Answer

Zoom WhiteSpeed uses LED; BriteSmile historically used plasma arc

Answer

Opalescence Boost uses plasma arc

Answer

KöR uses plasma arc in all protocols

Answer

Day White uses a plasma arc lamp

Question 4

How many applications (cycles) of gel are typically performed during a single Zoom in-office whitening appointment?

Accepted Answer

Three 15-minute applications

Answer

One 60-minute continuous application

Answer

Five 5-minute applications

Answer

Two 30-minute applications

Question 5

What is the purpose of a pre-treatment dental cleaning (prophylaxis) before in-office whitening?

Accepted Answer

Remove plaque and calculus so the gel contacts clean enamel evenly

Answer

Activate the peroxide gel faster

Answer

Harden enamel against peroxide penetration

Answer

Open dentinal tubules wider for deeper bleaching

Question 6

Which in-office whitening system is known for a refrigerated, high-viscosity gel and a desensitizing protocol called KöR-Seal trays?

Accepted Answer

KöR Whitening

Answer

Zoom WhiteSpeed

Answer

Opalescence Boost

Answer

Venus White Ultra