Deck 8: Teeth Whitening Materials and Procedures

Question 1

Which of the following is/are a potential side effect(s)of bleaching?

A) Condyle pain
B) Tooth sensitivity
C) Gum irritation
D) All of the above

Answer 1

All of the above

Question 2

How does tooth whitening work?

A) Dissolves stain from tooth enamel
B) Works as an abrasive against stains
C) Passes through enamel to lighten dentin
D) Forms free radicals on the tooth surface

Answer 2

Passes through enamel to lighten dentin

Question 3

Which of the following is considered to be an intrinsic stain?

A) Coffee
B) Black line
C) Tetracycline
D) Chlorhexidine

Answer 3

Tetracycline

Question 4

In addition to pumice,what substance is used to perform enamel microabrasion?

A) Carbamide peroxide
B) Hydrogen peroxide
C) Hydrochloric acid
D) Phosphoric acid

Question 5

Which item listed is not a side effect of in-home bleaching?

A) Tooth sensitivity
B) Irritated gingiva
C) Sore muscles of the jaw
D) Broken esthetic restorations

Question 6

Sodium peroxyborate monohydrate (Amosan)is utilized with _____ bleaching.

A) vital external
B) vital internal
C) devital external
D) devital internal

Question 7

Match the items with the correct description below.
This is the active ingredient in at-home bleaching kits.

A)Extrinsic stains
B)Intrinsic stains
C)Hydrogen peroxide
D)Carbamide peroxide
E)Hydrochloric acid

Question 8

What is the active ingredient in OTC bleaching materials?

A) Carbamide peroxide
B) Phosphoric acid
C) Sodium nitrate
D) Sodium hypochlorite

Question 9

What is the active ingredient used for in-office bleaching materials?

A) Sodium nitrate
B) Phosphoric acid
C) Hydrogen peroxide
D) Carbamide peroxide

Question 10

Which stains are most effectively removed by bleaching of vital teeth?

A) Black stains
B) Green stains
C) Blue-gray stains
D) Yellow-brown stains

Question 11

Match the items with the correct description below.
These stains form on the surface of the teeth and are caused by food,drink,smoking,and a variety of other sources.

A)Extrinsic stains
B)Intrinsic stains
C)Hydrogen peroxide
D)Carbamide peroxide
E)Hydrochloric acid

Question 12

Which of the following statements regarding power-whitening is correct?

A) The patient must return several times in order to get the desired effect.
B) Power-whitening is a permanent procedure.
C) Patients are sent home with custom trays and additional whitening materials.
D) Power-whitening does not cause tooth sensitivity.

Question 13

Which of the following statements is true regarding teeth bleaching?

A) All teeth bleaching products contain peroxide.
B) Teeth bleaching occurs when the bleaching material passes through the spaces in enamel and oxidizes the stains.
C) Acid etching before the application of the bleach chemical may enhance penetration of the bleach.
D) Acid etching will polish the surface of the enamel.

Question 14

What is the best way to protect oral tissues during a power-whitening appointment?

A) Isolight
B) Dry angles
C) Cotton rolls
D) Rubber dam

Question 15

Which of the following statements is true regarding types of tooth stains?

A) Intrinsic stains are on the tooth surface.
B) All extrinsic stains can be removed by hand or ultrasonic scaling and coronal polishing.
C) In general,yellow-brown discolorations are easier to bleach than blue-gray and black colors.
D) Tetracycline derivatives such as minocycline will cause discoloration of teeth in children but not in adults.

Question 16

Which of the following statements is true regarding home bleaching prescribed by the dentist?

A) The material consists of clear,flexible strips containing a peroxide gel that are adapted over the teeth and worn for 30 minutes at a time once or twice a day.
B) Only the anterior six teeth are covered.
C) The gel is placed in a custom-formed soft,thin plastic tray and is worn by the patient for periods as short as 30 minutes twice daily or as long as overnight.
D) The home bleaching process is less effective than the in-office process.

Question 17

Which stains have the best chance of removal when a bleaching product is used?

A) Iron
B) Food
C) Coffee
D) Antibiotics

Question 18

When should tooth whitening be done if the patient needs to have restorative work?

A) After the restorative is completed
B) At the same time as the restorative
C) Before the restorative is completed

Question 19

Why should a leaking restoration be replaced before the bleaching process is started?

A) Ensure a correct shade match
B) Prevent a line of black stain around the restorations
C) Be certain that restorative needs are treated before esthetic needs
D) Prevent excessive penetration of bleach through dentinal tubules that might irritate the pulp and cause sensitivity

Question 20

Bleaching materials often contain _____ to help cut down on tooth sensitivity.

A) potassium nitrate
B) fluoride
C) eugenol
D) calcium hydroxide

Question 21

What is the role of the dental assistant or dental hygienist in the delivery of whitening services for the patient?

Question 22

Match the items with the correct description below.
This is the active ingredient in power-whitening products used in the dental office.

A)Extrinsic stains
B)Intrinsic stains
C)Hydrogen peroxide
D)Carbamide peroxide
E)Hydrochloric acid

Question 23

Match the items with the correct description below.
These stains are caused by medications or developmental disturbances in the developing tooth bud.

A)Extrinsic stains
B)Intrinsic stains
C)Hydrogen peroxide
D)Carbamide peroxide
E)Hydrochloric acid

Question 24

Match the items with the correct description below.
This is mixed with flour pumice and applied to surface discolorations on the tooth.

A)Extrinsic stains
B)Intrinsic stains
C)Hydrogen peroxide
D)Carbamide peroxide
E)Hydrochloric acid