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Dental Materials > Exam 2 Study Guide > Flashcards

Exam 2 Study Guide Flashcards

(81 cards)

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1
Q

Forming polymers by joining monomers end-to-end

A

Polymerization

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2
Q

What cure is the most common way to activate the polymerization process?

A

Light cure

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3
Q

An increase in fillers in composites will ______ shrinkage and COE and will _______ strength/abrasion resistance

A

Decrease, increase

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4
Q

An increase in resin in composites will ______ shrinkage and COE and will _______ strength/abrasion resistance

A

Increase, increase

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5
Q

Proximal surfaces of anterior teeth

A

Class III

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6
Q

Cervical third of anterior and posterior teeth

A

Class V

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7
Q

Proximal surfaces of posterior teeth

A

Class II

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8
Q

Incisal edges of anterior teeth, cusp tips of posterior

A

Class VI

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9
Q

Proximal surfaces of anterior teeth and incisal edges

A

Class IV

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10
Q

Pits/fissues of posterior teeth, lingual of max incisors

A

Class I

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11
Q

Great polishability
Best esthetics
High shrinkage
Weak
Requires tooth support

A

Microfilled composites

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12
Q

Strongest
Most wear-resistant
Low shrinkage

A

Hybrid composites

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13
Q

Flows easily into cavity prep

A

Flowable composites

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14
Q

Strong
Highly wear-resistant

A

Nanofilled composites

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15
Q

Condensable
High viscosity

A

Packable composites

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16
Q

Rough
Strong
First developed

A

Macrofilled composites

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17
Q

Composites feel _____ than enamel while being explored?

A

Softer

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18
Q

How should composites be placed to reduce the chance for polymerization shrinkage?

A

Incrementally

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19
Q

Glass ionomer can most commonly be used in Class ___ cavity preparations.

A

V

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20
Q

What is an advantage to using glass ionomer?

A

Fluoride releasing

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21
Q

Composite system that releases fluoride

A

Compomer

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22
Q

What is dental amalgam?

A

Alloy of mercury

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23
Q

Grinded into fine particles, irregular shape

A

Lathe-cut alloy

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24
Q

Round particles

A

Spherical alloy

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25
What alloy particle shapes is best for interproximal surfaces?
Lathe-cut Admixed
26
Name the machine that is used to mix dental amalgam.
Triturator/Amalgamator
27
Toughest material Cost effective Longer life expectancy (12-18 yrs)
Advantages of amalgam
28
Unattractive Creep Requires tooth support
Disadvantages of amalgam
29
Creep was eliminated by using amalgam with what type of copper content?
High copper content
30
Mercury & tin reaction Weakest Most corrosion prone
Gamma 2 phase
31
Silver & tin reaction Most corrosion resistant Strongest phase
Gamma phase
32
Silver & mercury reaction Maintains some strength Corrosion resistance
Gamma 1 phase
33
How does amalgam stay in place?
Mechanical retention
34
What classes of cavity prep can amalgam be used in?
I, II, V, VI Small III sites
35
What class site can amalgam not be used in?
IV
36
What puts dental providers at higher risk for developing mercury toxicity?
Vapor
37
Why do we finish and polish amaglam?
To create continuous & clean margins between prep & restoration
38
What is used for the final polish of amalgam and gold in the mouth?
Tin oxide
39
Noble metals Resistant to corrosion & tarnish
Precious metals
40
Base metals Susceptible to corrosion & tarnish
Non-precious metals
41
Name three reasons for finishing & polishing restorations.
Improve esthetics Improve tissue health Improve longevity of restorations
42
Removal by shearing off
Cutting
43
Producing final shape & color
Finishing
44
Abrasion of surface to produce smoothness & reduce size of scratches
Polishing
45
What order are abrasive agents used based on grit size?
Coarse to fine
46
Resistance of a material to indentation
Hardness
47
_____ hardness of abrasive will increase the rate of abrasion.
Increased
48
Irregular particles are _____ abrasive than sphere-shaped particles.
More
49
Smaller particle are ____ abrasive than larger particles.
Less
50
What are the ways to avoid pulpal truama?
Slowest handpiece Light pressure Adaquate lubricant Least abrasive agent
51
Used to subgingivally air polish
Glycine
52
White powder Final polish in mouth for amalgam and gold
Tin oxide
53
Replaced emery polishes composites
Aluminum oxide
54
Block form Not used intraorally
Rouge
55
Grey in color Made from natural volcanic silica
Pumice
56
Hardest substance Cuts crowns and bridges
Diamond
57
Whiting In prophy paste and toothpaste
Chalk
58
Used to supragingivally air polish
Sodium bicarbonate
59
What is the purpose of selective polishing?
Avoid removing fluoride-rich enamel layer
60
What are custom mouth guards fabricated with?
Ethylene vinyl acetate acrylic
61
What oral appliance is recommended for a patient undergoing radiation?
Custom fluoride tray
62
What oral appliance is scalloped at the gingival margin to prevent truama?
Custom bleaching trays
63
What are the 3 ways an obstructive sleep apnea device is used?
Life soft palate Hold tongue in forward position Reposition mandible forward to open airway
64
What are 3 ways dental cement can be used?
Type I: Luting Type II: Provisional/intermediate Type III: Liners & bases
65
Dental cements are created via mixing of what?
Liquid and a powder
66
What are the two powders that can be used in formation of dental cement?
Zinc oxide Powdered glass
67
Organic Weak Oil of cloves
Eugenol
68
Very acidic Irritating to tissue
Phosphoric acid
69
Very viscous Dispense only when ready to mix
Polyacrylic acid
70
What makes ZOE?
Eugenol + Zinc oxide powder
71
What is made from eugenol + glass powder?
No reaction
72
What is made from phosphoric acid + zinc oxide powder?
Zinc phosphate
73
What is made from phosphoric acid + glass powder?
Silicate cement
74
What is made from polyacrylic acid + zinc oxide powder?
Polycarboxylate cement
75
What is made from polyacrylic acid + glass powder?
Glass ionomer cement
76
Sedative to pulp
Obtundent
77
Cement liner that stimulates reparative dentin and protects when cavity prop is close to pulp
Calcium hydroxide
78
Seal & medicate the pulp
Liners
79
Thermal insulation & mechanically support the pulp
Bases
80
What 3 dental cements bond directly to the tooth surface?
Resin-based Polycarboxylate Glass ionomer
81
Which cement must be mixed on a glass slab and why?
Zinc phosphate To keep the cement cooled

Dental Materials (14 decks)

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