Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Patient Care II > Exam III (Final) > Flashcards

Exam III (Final) Flashcards

1
Q

Types of cement:

A
  1. zinc phosphate
  2. zinc oxide eugenol
  3. zinc polycarboxylate
  4. glass ionomer
  5. resin-modified glass ionomer
  6. provisional cements
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Its important to note that cement will perform to its optimal level clinically without an ____ that includes ___ & ____

A

adequate preparation; good resistance & retention form

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Why should you read the instructions for cement carefully?

A

because mixing, handling, and physical properties vary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are some characteristics that we are looking for in a good cement? (8)

A
  1. biocompatibility
  2. retention
  3. mechanical properties
  4. marginal seal
  5. low film thickness
  6. ease of use
  7. radiopacity
  8. esthetics
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What mechanical properties are we looking for in a good cement?

A

withstand occlusal forces & high tensile strength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the first cement that appears in dental literature?

A

zinc-phosphate cement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What cement is the gold standard that other cements are compared to?

A

zinc phosphate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the advantages of zinc phosphate cement (4)

A
  1. think film thickness & proven reliability
  2. low solubility which resists breakdown in the mouth
  3. low thermo-conductivity (less sensitivity to hot and cold)
  4. long shelf life
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the disadvantages of zinc phosphate cement? (6)

A
  1. Initial low pH- can lead to pulpal irritation
  2. no chemical adhesion/bond
  3. no antibacterial properties
  4. poor esthetics (for all porcelain)
  5. Long setting time
  6. Exothermic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe the setting time for zinc phosphate cement:

A

long setting time- (2.5-8 min)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Describe the exothermic reaction that occurs with zinc-phosphate cement:

A

exothermic reaction- chilled glass slab necessary when mixing, small amount of powder added to liquid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

There are two types of ZOE which differ in their:

A

properties and uses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

ZOE:

A

zinc oxide eugenol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Less strong and is used for temporary restorations and for temporary cementation:

A

Type 1 Zinc Oxide Eugenol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Reinforced and stronger, referred to as an intermediate restorative. Can last for 6-12 months in the mouth. Used of a tooth that cannot be restored immediately (IRM)

A

Type 2 Zinc Oxide Eugenol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Describe the strength of ZOE type 1 and what it might be used for:

A

Less strong; temporary cementation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is an example of ZOE type 1:

A

Temp-bond

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Describe the strength of ZOE type 2 and what it might be used for:

A

reinforced and stronger, used for a tooth that cannot be restored immediately (IRM)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What type of ZOE might be referred to as an intermediate restorative?

A

Type II

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

A type 2 ZOE can last for ____ in the mouth.

A

for 6-12 months

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Benefits of ZOE include: (3)

A
  1. neutral pH
  2. Has sedative or soothing effect on dental pulp
  3. Protective or insulating base or liner is NOT required
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is the pH of ZOE?

A

neutral pH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Describe the effect of ZOE on pulp:

A

sedative or soothing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is not required with a ZOE?

A

protective or insulating base or liner

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What are the disadvantages of ZOE?

A

Cannot be used under composite or acrylic restorations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Why can’t a ZOE be used under composite or acrylic restorations?

A

eugenol is incompatible with composite and acrylic and also retards their setting processes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

The type and intended use of the ZOE material determines whether:

A

The powder is incorporated into the liquid of all at once

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What is the mixing time for a ZOE?

A

30-60 seconds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What is the setting time for ZOE?

A

approximately 3-5 minutes

30
Q

Cement that was developed in 1968 to circumvent pulpal problems associated with pH:

A

Zinc polycarboxylate

31
Q

Zinc polycarboxylate was developed to circumvent ____ problems associated with _____.

A

pulpal problems; low pH

32
Q

What was the first cementing system to obtain adhesive agents that bonded to enamel & dentin?

A

Zinc polycarboxylate

33
Q

Zinc polycarboxylate is the first cementing system to obtain an adhesive agent that bonded to:

A

enamel & dentin

34
Q

zinc polycarboxylate has ____ action

A

antibacterial action

35
Q

What is the working time for zinc polycarboxylate?

A

2-5 min

36
Q

Describe the “mixing” of zinc polycarboxylate:

A

Needs to be mixed quickly (30-40 sec)

37
Q

In polycarboxylate the powder is incorporated in:

A

large quantities

38
Q

Describe the fragility of zinc polycarboxylate compared to zinc phosphate:

A

Zinc polycarboxylate is not as fragile as zinc phosphate

39
Q

Disadvantages of zinc polycarboxylate: (4)

A
  1. can have poor marginal sealing
  2. sometimes doesn’t support occlusal stress
  3. will bond to most alloys but not gold
  4. due to potential for plastic deformation, it is much more difficult to remove excess cement
40
Q

Why can zinc polycarboxylate have poor marginal sealing?

A

due to film thickness

41
Q

Polycarboxylate doesn’t support _____ as well as newer cements

A

occlusal stress

42
Q

Polycarboxylate will bond to most _____ but not to ____

A

most alloys; gold

43
Q

Due to polycarboxylates potential for ___, it is much more difficult to ____.

A

plastic deformation; remove excess cement

44
Q

Although polycarboxylate bonds well to _____, it’s use has lessened over the years

A

enamel/dentin

45
Q

Durelon is an example of:

A

zinc polycarboxylate

46
Q

Glass Ionomer is known as:

A

acid-base cement

47
Q

Part of the success of gas ionomer cements is their performance is good even if:

A

they have not been properly mixed

48
Q

Describe the film thickness of glass ionomer:

A

very thin

49
Q

Glass ionomer is extremely _____ but fairly _____.

A

extremely moisture tolerable; fairly soluble

50
Q

What is one of the most important advantages of glass ionomer?

A

fluoride release; it can be sustained of for long period of time

51
Q

Describe the fluoride release of glass ionomer: (3)

A
  • can be sustained for long periods of time
  • initial rapid release followed by a sustained lower level diffusion release
  • fluoride release increases in acidic conditions which raises the pH
52
Q

Glass ionomer helps protect the tooth ___ from ____

A

tooth/margins; further tooth decay

53
Q

Describe the radiopacity of glass ionomer:

A

radiopaque

54
Q

What are uses of glass ionomer? (3)

A
  1. liner
  2. luting agent
  3. build-up material
55
Q

glass ionomers contain _____ for strength

A

silver particles

56
Q

This was formed in the early 1990’s to overcome the high solubility of glass ionomers:

A

Resin-modified glass ionomer

57
Q

Resin modified glass ionomers are glass ionomers with ____ added to them

A

hydrophilic methacrylate monomers

58
Q

Resin modified glass ionomers are considered a ____ cement

A

acid-base

59
Q

Benefits of resin-modified glass ionomers have what benefits:

A

all the same benefits of glass ionomer cements

60
Q

What are the disadvantages of resin-modified glass ionomers?

A

Low early strength and moisture sensitivity during setting

61
Q

How long does it usually take for a resin-modified glass ionomer to set?

A

usually 24 hrs for the final set

62
Q

For glass ionomers in general, the working time can affect the ____

A

film thickness

63
Q

for glass ionomers in general, the working time can affect the film thickness, so longer working times allow ____ and will aid in ____.

A

more flow; aid in seating the restoration

64
Q

For glass ionomers in general, once the material begins to set, the ____ rises rapidly and ___ becomes impossible

A

viscosity; flow

65
Q

For glass ionomers in general, it is extremely important that mixing and placement of the cement is complete within:

A

2-2.5 minutes

66
Q

Key role is keeping the temporary restoration on the tooth while the patient is waiting for the final restoration to return from the lab

A

provisional/temporary cement

67
Q

A provisional/temporary cement needs to be:

A

easily removed without harm

68
Q

Most provisional/temporary cements have ____.

A

eugenol (ZOE)

69
Q

Most provisional/temporary cements have eugenol (ZOE)- although eugenol can have a negative effect on ____ & ____.

A

acrylic resins & composite resin cements

70
Q

What is the purpose of eugenol in a provisional/temporary cement?

A

antibacterial effect

71
Q

What are 3 types of provisional/temporary cements?

A
  1. temp-bond
  2. ultra-temp
  3. relyx temp
72
Q

What questions do we ask ourselves when selecting a provisional/temporary cement?

A
  1. How long
  2. How retentive
  3. What permanent cement will be used in future
  4. Are we working in an esthetic zone

Patient Care II (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions