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Au 15- Early Clinic > Bleaching > Flashcards

Bleaching Flashcards

1
Q

What is the mechanism of action for bleaching?

A
  • The tooth is a semi-permeable membrane
  • Peroxides have low molecular weight
  • Peroxides penetrate the enamel and dentin quickly
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2
Q

How long does it take for peroxides to reach the pulp?

A

5-15 minutes

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3
Q

True or False: Peroxide levels are very high and you must be careful not to damage the pulp.

A

False, levels are low enough to not damage the pulp

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4
Q

10% carbamide peroxide is equivalent to _____ % hydrogen peroxide.

A

3.5%

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5
Q

True or False: Peroxides have high molecular weights.

A

False

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6
Q

True or False: Peroxides penetrates the enamel and dentin slowly.

A

False

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7
Q

Which is more stable: hydrogen peroxide or carbamide peroxide?

A

carbamide

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8
Q

Hydrogen peroxide is active for _______ mins.

A

30-60

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9
Q

How much carbamide peroxide is released in 2 hours?

A

50%

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10
Q

Peroxide breaks down _______ and leads to less color.

A

bonds in the chromafore (aka its a loss of color, not an addition of “whiteness”)

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11
Q

Bleaching is effective for ____ and ______ stains.

A

intrinsic and extrinsic

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12
Q

True or False: Cementum does not bleach.

A

True

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13
Q

Can patients with recession bleach?

A

Yes, there will be sensitivity and the areas of cementum will not bleach, but enamel portions will.

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14
Q

What type of peroxide is in whitening rinses?

A

hydrogen peroxide (low%)

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15
Q

What type of peroxide is in whitening toothpaste?

A

carbamide peroxide (low%)

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16
Q

What type of peroxide is in whitening gum?

A

NONE (mostly abrasive action)

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17
Q

What type of peroxide is in whitening paints?

A

carbamide or hydrogen peroxide (10-18%)

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18
Q

What type of peroxide is in white strips?

A

Hydrogen peroxide (5-14%)

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19
Q

True or False: Rinses, toothpastes, gum, and paints have minimal whitening.

A

True

20
Q

Dentist prescribed whitening products will generally contain ______ carbamide peroxide.

A

10-35%

21
Q

What percentage of carbamide peroxide is best for overnight wear?

A

10%

22
Q

In office bleaching in commonly ______ % hydrogen peroxide and it requires gingival ______.

A

25-38%

isolation

23
Q

True or False: The use of light when bleaching will dramatically improve the results.

A

False

24
Q

How long does “in office” whitening usually take?

A

about an hour

25
Q

What is the most common side effect of whitening?

A

hypersensitivity

26
Q

What is the second most common side effect of whitening?

A

gingival irritation

27
Q

What is the best way to reduce sensitivity associated with whitening?

A

two weeks of using toothpaste that contains potassium nitrate

28
Q

True or False: There is always about 1/2 shade rebound one week after completing the bleaching process.

A

True
in office session: 2 shade rebound
trays: 1/2 shade rebound

29
Q

What is the most important thing to discuss with patients prior to beginning whitening treatment?

A

realistic expectations (every tooth has a maximum degree of whitening and a maximum rate of change)

30
Q

______ shades will whiten more easily than _____ shades.

A 
red/yellow
blue gray (SLOWWWWW changes)
31
Q

Whitening treatment can last as long as _____ years depending on multiple factors.

A

1-3

32
Q

What is the average treatment time?

A

2 weeks

33
Q

What are the patient instructions for tray whitening?

A
  1. Brush teeth
  2. load a small amount of gel onto facial aspect of each tooth
  3. Wear tray according to determined time
  4. Remove tray, clean with brush and cool water
34
Q

According to OSU Protocol, what should you do if a patient inquires about whitening?

A

Ask 5 listed questions

35
Q

According to OSU Protocol, what are the contraindications for whitening?

A
  1. patients with extremely large pulps
  2. exposed root surfaces
  3. severe loss of enamel
  4. pregnancy
  5. Allergies to peroxide
36
Q

According to OSU Protocol, what needs to be completed prior to whitening?

A

a complete prophylaxis

37
Q

Before payment is made, the patient must _______.

A

read and sign the consent form

38
Q

A payment for ______ is necessary before fabrication of the trays.

A

one arch

39
Q

How long should you wait after whitening procedure before placing any anterior restorations?

A

2 weeks

40
Q

What is the first appointment for?

A

taking impressions

41
Q

What is the second appointment for?

A

fitting the trays and dispensing the whitening gel

42
Q

What is the third appointment for?

A

2 weeks after second appt. assess the completion of whitening

43
Q

Patients must sign the _____ and the _____.

A

consent form and progress notes

44
Q

The consent form should be placed in the folder behind the _____ tab.

A

green

45
Q

If a patient comes back for a fourth appointment and the saturation point has not yet been met, do they have to pay for additional syringes?

A

NO, no payment necessary…just obtain a faculty signature

46
Q

Do patients pay for touch-up bleaching after appointment four?

A

YES, they will be given 3 more syringes after faculty receives the cashier’s receipt

Au 15- Early Clinic (9 decks)

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