Applied Dental Materials 2 Lecture 5 (Preventive)

Front 1

___ dental materials are materials designed to prevent disease OR injury to the oral tissue

Back 1

preventive

Front 2

Which are NOT a preventive dental material?

Fluoride gel
Mouth protectors
Articulating paper
Sealants

Back 2

articulating paper

Front 3

Dental fluorides are available in what 4 common forms?

Back 3

gel, varnish, foam, rinse

Front 4

True or False, fluoride will kill you instantly and is really dangerous and doesn't help your teeth at all

Back 4

False

Front 5

True or False, APF has acid in it

Back 5

True, 0.98% phosphoric acid

Front 6

What are the % of the components for Acidulated phosphate fluoride?

Back 6

2% NaF
0.34% hydrogen fluoride
0.98% phosphoric acid

flavoring, thickening, and coloring agents

Front 7

What does APF stand for?

Back 7

acidulated phosphate fluoride

Front 8

What's the overall fluoride concentration of APF?

Back 8

about 1.22-1.32%

Front 9

Neutral NaF has a pH of __-__ for what reason?

Back 9

6-8
Avoid etching of restorative materials

Front 10

True or False, varnished containing 5% NaF are available

Back 10

True

Front 11

What dental material would likely NOT be etched by APF?

Amalgam
Composite
GI
Compomer
Hybrid Ionomer
Ceramics

Back 11

Amalgam

Front 12

What are the % of the components for Acidulated phosphate fluoride?

Back 12

2% NaF
0.34% hydrogen fluoride
0.98% phosphoric acid

flavoring, thickening, and coloring agents

Front 13

Which of these should be used twice a year?

APF
2% NaF
1.1% NaF gel/toothpaste
0.4% SnF2 gel
0.2% NaF rinse

Back 13

APF
2% NaF

(These are "in office")

Front 14

What does APF stand for?

Back 14

acidulated phosphate fluoride

Front 15

Which of these can be used daily?

APF
2% NaF
1.1% NaF gel/toothpaste
0.4% SnF2 gel
0.2% NaF rinse

Back 15

1.1% NaF gel/toothpaste
0.4% SnF2 gel

(These are "home use")

Front 16

What's the overall fluoride concentration of APF?

Back 16

about 1.22-1.32%

Front 17

How often can one use 0.2% NaF rinse?

Back 17

Weekly

Front 18

Neutral NaF has a pH of __-__ for what reason?

Back 18

6-8
Avoid etching of restorative materials

Front 19

How often can one use 0.05% NaF, 0.24% NaF toothpaste, and 0.8% MFP?

Back 19

Daily

Front 20

True or False, varnished containing 5% NaF are available

Back 20

True

Front 21

What dental material would likely NOT be etched by APF?

Amalgam
Composite
GI
Compomer
Hybrid Ionomer
Ceramics

Back 21

Amalgam

Front 22

Which of these should be used twice a year?

APF
2% NaF
1.1% NaF gel/toothpaste
0.4% SnF2 gel
0.2% NaF rinse

Back 22

APF
2% NaF

(These are "in office")

Front 23

Which of these can be used daily?

APF
2% NaF
1.1% NaF gel/toothpaste
0.4% SnF2 gel
0.2% NaF rinse

Back 23

1.1% NaF gel/toothpaste
0.4% SnF2 gel

(These are "home use")

Front 24

How often can one use 0.2% NaF rinse?

Back 24

Weekly

Front 25

How often can one use 0.05% NaF, 0.24% NaF toothpaste, and 0.8% MFP?

Back 25

Daily

Front 26

APF gels are applied in (soft/hard) trays

Back 26

soft

Front 27

How long should APF be used in mouth?

Back 27

4 min

Front 28

Patient should not eat for __ min after APF application

Back 28

30

Front 29

Rinses are not recommended for children under __ years old

Back 29

6

Front 30

Neutral NaF has ___ properties

Back 30

thixotropic

(viscosity decreases and flow increases on application of force)

Front 31

T or F, APF can stain restorations

Back 31

FALSE! but they can etch them

Front 32

Which of these is NOT acidic?

APF
Sodium Fluoride gel
Stannous Fluoride gel

Back 32

Sodium F

Front 33

Topical fluoride is best used in conjunction with a fluoride-containing ___

Back 33

rinse

Front 34

True or False, rinses are good substitutes for mechanical plaque removal

Back 34

False

Front 35

0.12% of what is used in Peridex and Perioguard?

Back 35

chlorhexidine

Front 36

Listerine uses a ___ based product with methylsalicylate in alcohol

Back 36

phenol

Front 37

The purpose of a sealant is a (chemical/physical) barrier to bacteria

Back 37

physical

Front 38

What are two methods used to prepare a tooth for sealants?

Back 38

acid etch
air abrade (with Al3O2 particles propelled by air)

Front 39

What type of sealants are recommended by the ADA council on scientific affairs?

Back 39

resin-based

Front 40

What are two LOW viscosity dimethacrylate monomers?

Back 40

bis-GMA, UDMA

Front 41

What is in sealants at 1% for opacity and enamel contrast

Back 41

TiO2

Front 42

Inorganic filler by up to __% by weight in sealants

Back 42

50

Front 43

Resin sealants can be __ or __ cured

Back 43

cold, self

Front 44

What are the 2 components of the 2 component curing system of resin sealants?

Back 44

benzoyl peroxide initiator
5% tertiary amine activator

Front 45

Light cured resin sealants are a __ component system (#)

Back 45

1

Front 46

What is the light activated component of resin sealants?

Back 46

camphoroquinone (diketone; photoinitiator molecule)

Front 47

Glass ionomers are (chemically/mechanically) retained via what element?

Back 47

chemically, Ca+

Front 48

What has better bond strength, GI or resin-based sealants?

Back 48

resin based sealant

Front 49

What releases more fluoride, GI or resin sealants?

Back 49

GI

Front 50

Ideal sealants should do 9 awesomely awesome things

Back 50

These are pretty self-explanatory... look them up if you want

One had one is that they should NOT form an O2 inhibited layer

Front 51

Sealants are retained by what type of retention?

Back 51

micromechanical

Front 52

Why are fissures difficult to fill?

Back 52

air and debris are trapped at bottom of fissures

Front 53

What is the equation for rate of penetration?

Back 53

r(PC)/2l

r - radius of fissure
l - length

Front 54

What does the PC = in the rate of penetration equation?

Back 54

γ(cosθ)/2(η)

γ = surface tension
θ = contact angle
η = viscosity of sealant

Front 55

Which has a LONGER working time, chemically or light-activated sealants?

Back 55

light-activated

Front 56

Chemically-activated sealants have the following compared to light-activated

(shorter/longer) working time
(shorter/longer) polymerization time
(less/more) expensive
(does/doesn't) require mixing

Back 56

shorter, longer, less, does

Front 57

(chemical/light) activated sealants should be stored in dark containers

Back 57

light

Front 58

A greater C value will lead to (more/less) pulling of the restoration away form the walls of a restoration

Back 58

more

Front 59

Which of these will NOT cause sensitivity to teeth in a typical situation?

Warm water on enamel
Movement of fluid in dentin tubules
Osmotic pressure changes
Cold on exposed pulp

Back 59

Warm water on enamel

Front 60

True or False, simple evaporation of water from dentin by air blasts can cause sensitivity

Back 60

True

Front 61

What are two ways that OTC desensitizing agents work?

Back 61

PLUGGING open tubules via chemical OR mechanical

Desensitizing the actual nerve

Front 62

Which of these is not considered a desensitizing agent

fluoride
potassium oxalate
ferric oxalate
dentin bonding agents
Al3O2

Back 62

Al3O2

Front 63

(potassium/sodium) nitrate is a nerve depolarizer

Back 63

potassium

Front 64

Amorphous (calcium/aluminum) phosphate mineralizes the opening of dentinal tubules

Back 64

calcium

Front 65

True or False, GI sealants can act as desensitizing agents

Back 65

True

Front 66

By what mechanism do mouth protectors actually protect the mouth?

Back 66

Absorb impact energy

Front 67

Injury occurs (more/less) often when mouth protector is used

Back 67

less

Front 68

Which of these is NOT a response of the teeth when trauma occurs?

pulpitis
enamel hardening
pulpal necrosis
reabsorption
hemorrhage
pulp canal obliteration

Back 68

enamel hardening

Front 69

Mouth protectors are also known as ___

Back 69

mouthguards

Front 70

According to Dr. Khajotia, what are the three common types of mouth protectors?

Back 70

stock
mouth-formed
custom-made

Front 71

Anita Job goes to Walmart and grabs a mouthpiece from the sports section. What kind is it?

stock
mouth-formed
custom-made

Back 71

stock

Front 72

Justin Case wanted to make sure he had the best mouth piece available for football season. He should get a ___ mouth protector.

stock
mouth-formed
custom-made

Back 72

custom-made

Front 73

Mouth protectors are made of ___ polymers

Back 73

thermoplastic

Front 74

What are some of the materials that custom-made mouth protectors are made from?

Back 74

polyethylene-poly(vinyl acetate) [EVA]
rubber latex
polyurethane
vinyl plastisol

Front 75

Ned N. Munee was looking for the cheapest mouth protector. He decided to rank them from MOST to LEAST expensive... can you help him?

mouth-formed
stock
custom-made

Back 75

custom-made
mouth-formed
stock

Front 76

Put these steps for making mouth protectors in order:

finish
form thermoplastic material on cast
impressions of arch
pour cast in disinfected impression

Back 76

impression
pour
form thermoplastic
finish

Front 77

Many injuries result from the (maxilla/mandible) being driven into the other

Back 77

mandible

Front 78

True or False, mouth protectors concentrate forces on posterior teeth because they are the strongest

Back 78

FALSE! they distribute force over the entire arch

Front 79

Label!

Back 79

A mouth protector sheet
B upper clamp
C lower clamp
D model
E perforated support plate
F heater
G vacuum switch
H heater switch
I sag of 3cm permitted before vacuum is switched on

Front 80

Which of these do NOT need to be taken into consideration when making a mouth protector?

-Does pt have ortho?
-Does pt have teeth still erupting that you need to make space for?
-Does pt have frenum in the way?
-Will all teeth contact the mouth protector?

Back 80

NONE!

You must consider all 4 of these things!

Front 81

EVA has the following compared to polyurethane

(lower/higher) initial strength
(lower/higher) hardness
(lower/higher) more energy absorption
(lower/higher) water sorption
requires (lower/higher) processing temp

Back 81

ALL lower

Front 82

EVA has the following compared to vinyl plastisol

(lower/higher) strength
(lower/higher) hardness
(lower/higher) energy absorption
(lower/higher) processing difficulty

Back 82

higher, higher, higher, lower

Front 83

T or F, gagging, poor taste, irritation and speech impairment are common downfalls of custom made protectors

Back 83

False, these are NOT common

Front 84

T or F, only stock mouth protectors will stain

Back 84

False, they can all stain

Front 85

What are the three main causes of mouth protector breakdown?

Back 85

biting, tearing, general deterioration

Front 86

T or F, pressure and heat can actually lead to permanent deformation of mouth protectors

Back 86

True

Front 87

You should clean mouth protectors in (cool/hot) water

Back 87

cool

Front 88

It's ok to scrub mouth protectors with abrasive dentifrices

Back 88

Nope

Front 89

T or F, you can use alcohol and denture cleaning products on mouth protectors

Back 89

False

Front 90

True or False, mouth protectors do not need any special storage treatment

Back 90

False, store in a rigid container