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Dental Assisting > 1113 Test 3 > Flashcards

1113 Test 3 Flashcards

1
Q

What are the methods of setting

A

Auto cure, light cure, dual cure

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2
Q

When is amalgam used

A

When the patient can’t afford, can’t sit still or has lots of moisture

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3
Q

What classes of cavity is amalgam used for

A

1 or 2 (not on the front of incisors for esthetics)

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4
Q

What is galvanic action

A

When water and salt conduct a shock between 2 metals

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5
Q

Describe glass ionomer

A

Releases fluoride, adheres to metal and teeth, used for class 5 restorations

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6
Q

Describe the smear layer

A

Removed by etching for 20 seconds, layer by pulp, leave moist

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7
Q

Describe intermediate restorations

A

Temporary, used for caries management, used on primary teeth

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8
Q

What are the types of pulpal stimuli

A

Chemical (acid), biological (bacteria),

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9
Q

What does calcium hydroxide do

A

Repairs dentin

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10
Q

How much does the anatomic portion of an impression make

A

2 thirds

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11
Q

How much of the impression does the base make

A

1 third

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12
Q

How is the upper arch model trimmed

A

With points

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13
Q

How is the lower arch model trimmed

A

Rounded

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14
Q

How many scoops of powder is used for the upper impression

A

3 scoops

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15
Q

How many scoops of powder is used for the lower impression

A

2 scoops

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16
Q

When making plaster which goes first water or powder

A

Water

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17
Q

What is synerisis

A

When impression materials dry out

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18
Q

What is imbibition

A

When impression materials are too moist or have too much water

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19
Q

Describe the metals that make up amalgam

A

Silver (strength), tin (workability and strength), copper (strength and corrosion resistance), zinc (suppresses oxidation)

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20
Q

What is ductility

A

The ability to be flexible

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21
Q

What is malleability

A

The ability to be manipulated or molded

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22
Q

What is viscosity

A

How fast a liquid flows

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23
Q

Define solubility

A

The ability of something to dissolve

24
Q

Describe the procedure for shallow amalgam

A

desensitizer, etching and bonding.

25
Q

Describe moderate amalgam restorations

A

Base, varnish or desensitizer, etching/ bonding

26
Q

Describe deep amalgam restoration procedures

A

Liner, base, varnish or desensitizer, etching/bonding

27
Q

What is the most common bleaching agent for tooth whitening

A

Carbamide peroxide

28
Q

Describe zinc oxide

A

Anti-bacterial, affordable, used in zinc oxide eugenol (ZOE), anti-inflammatory, used for temporary restorations

29
Q

describe varnish

A

coating of fluoride applied to teeth to prevent decay, used on children and adults with high risk of caries, made of fluoride and resin

30
Q

what is the final impression made of

A

elastomeric material

31
Q

what is wax used for

A

measuring patients bite (registration), for making models of temporary restorations (bridges)

32
Q

what are advantages of alganate

A

inexpensive, quick-setting

33
Q

describe polyether

A

A rubber-based material, known for its stiffness

34
Q

which is more practical Addition Silicone or condensation silicone

A

addition silicone

35
Q

describe Zinc Oxide-Eugenol (ZOE)

A

used for final impressions in complete denture cases, Captures fine detail and provides excellent stability but can be irritating to some patients due to the eugenol component

36
Q

describe impression compound (thermoplastic)

A

A wax-like material that softens with heat, Primarily used for border molding or making impressions for dentures, Allows for adjustments by reheating

37
Q

why do you take a lower impression first

A

because patients choke more on the upper arch

38
Q

what are the setting times of alganate

A

fast setting - 1-2 minutes, regular setting - 3+ minutes

39
Q

What are the types of bases

A

Protective, insulative, sedative

40
Q

Which materials are used for bases

A

Zoe, zinc phosphate cement, polycarboxylate, glass ionomer

41
Q

What are the types of elastomeric material

A

Polysolfide (strong odor), polyether (solid stability and okay odor), condensation silicone (okay odor and stability), addition silicone (okay odor and excellent stability)

42
Q

Describe the face bow

A

Measures the relation between the maxillary arch and the tmj joint

43
Q

Describe the face bow procedure

A

Attach tray, rod and bite tabs, make the patient bite slowly and level, document

44
Q

Where should an impression go

A

2-3 mm behind tuberosity

45
Q

How would an impression be critiqued

A

Detail, margins, proper flow, tray fit, distortion free

46
Q

How does glass ionomer adhere

A

Chemically

47
Q

What type of wax is used to extend

A

Utility wax

48
Q

What is pulimerization

A

Hardening

49
Q

What are temporary restoration made of

A

Acrylic resins

50
Q

What are intermediate materials used for

A

Restorative emergencies, caries management, Bases

51
Q

What are intermediate materials used for

A

Restorative emergencies, caries management, Bases

52
Q

What is hardness

A

How much a material will be dented

53
Q

Should dental materials be high or low solubility

A

Low

54
Q

What is an indirect restoration

A

Final (made in lab)

55
Q

What type of restoration material is zoe

A

Intermediate

56
Q

What is a pestal

A

A ball that mixes

Dental Assisting (9 decks)

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