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Fixed Prosthodontics > Cements > Flashcards

Cements Flashcards

1
Q

What cements have an an ACID-BASE setting mechansim:

A

Zinc phosphate
Polycarboxylate
Glass ionomer

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2
Q

What cement has both an ACID-BASE & POLYMERIZATION setting mechanism?

A

RMGI

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3
Q

What cements have a POLYMERIZATION setting mechanism?

A

Resin based
Self-adhesive resin based

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4
Q

Put in order of least to greatest amount of film thickness of the following cements; include values:

-zinc phosphate
-polycarboxylate
-glass ionomer
-RMGI
-Resin based
-Self-adhesive resin based

A

LEAST:
Glass ionomer (13.5)
Polycarboxylate (19)
RMGI (23.1)
Self-adhesion resin based (less than 25)
Zinc phosphate (25.3)
Resin based (29.6)
GREATEST)

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5
Q

Which cement has the greatest film thickness?

A

Resin based

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6
Q

Which cement has the least amount of film thickness?

A

Glass ionomer

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7
Q

Which cements have working times of up to 5 min?

A

Zinc phosphate (1.5-5)
Resin based (0.5-5)
Self-adhesive resin based (0.5-5)

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8
Q

Which cements have a setting time of 1-15 min?

A

Resin based & self-adhesive resin based

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9
Q

What cement has a setting time of 2 min?

A

RMGI

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10
Q

What cements have a setting time of 6-9 min?

A

Polycarboxylate & glass ionomer

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11
Q

What cement has the GREATEST compressive strength?

A

Self-adhesive resin based (200-240)

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12
Q

What cement has the LOWEST maximum compressive strength?

A

Polycarboxylate (67-91)

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13
Q

What cement has the ability to have the lowest (initial) compressive strength/

A

RMGI (41-141)

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14
Q

Which cements have the lowest tensile strength?

A

Zinc phosphate (3.1-4.5)

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15
Q

What cement has the greatest tensile strength?

A

self-adhesive resin based (37-41)

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16
Q

What cement has the greatest tensile strength, compressive strength and elastic modulus?

A

Self-adhesive resin based

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17
Q

Describe the pulp irritation caused by the following cements:

Glass ionomer:
RMGI:
Resin based:
Self-adhesive resin based:

A

HIGH

18
Q

Describe the pulp irritation caused by the following cements:

Zinc phosphate:

A

Moderate

19
Q

Describe the pulp irritation caused by the following cements:

Polycarboxylate:

A

Low

20
Q

What cement would you used on someone with an already irritated pulp?

A

Polycarboxylate

21
Q

What cements have HIGH solubility?

A

Zinc phosphate & polycarboxylate

22
Q

What cements have VERY LOW solubility?

A

RMGI
Resin-based
Self-adhesive resin based

23
Q

What cements have LOW solubility?

A

Glass ionomer

24
Q

What cements have a high rate of miroleakage?

A

Zinc phosphate
Polycarboxylate (high to very high)

25
Q

What cements have a low to very high microleakage rate (large range)?

A

Glass ionomer

26
Q

What cements have very low mircoleakage rates?

A

RMGI
Resin-based
self-adhesive resin based

27
Q

Describe the removal of excess cement for the following:

-zinc phosphate:

-polycarboxylate:
-glass ionomer
-RMGI:

-resin based
-self adhesive resin based

A

-zinc phosphate: EASY

-polycarboxylate: MEDIUM
-glass ionomer: MEDIUM
-RMGI: MEDIUM

-resin based: DIFFICULT
-self adhesive resin based: DIFFICULT

28
Q

What cements have the highest retention?

A

Resin based & self-adhesive resin based

29
Q

What cements have moderate retention?

A

Zinc phosphate & RMGI

30
Q

What cement has moderate to high retention?

A

Glass ionomer

31
Q

What cement has low to moderate retention:

A

Polycarboxylate

32
Q

What cements displace micromechanical bonding to tooth structure/

A

resin based & self-adhesive resin based

33
Q

How does RMGI bond to the tooth?

A

molecular and micromechanical

34
Q

Which cements display molecular only bonding to tooth surface?

A

polycarboxylate & glass ionomer

35
Q

Zinc phosphate bonds to the tooth through:

A

Nonadhesive

36
Q

Which cements released fluoride?

A

Glass ionomer & RMGI

37
Q

what are the absolute needs of cements?

A
  1. biocompatibility
  2. inert & noncorrosive
  3. insolubility to acid attack
  4. dimensional stability (minimal shrinkage & minimal expansion
38
Q

What are the NEEDs of cements?

A
  1. set up quickly
  2. low surface tension
  3. adapts & adheres to anatomy
  4. insensitive to moisture during procedure
  5. fluoride release
  6. anti-microbial
  7. radiopaque
  8. cost effective
39
Q

What are the wants of cements?

A
  1. low film thickness (can be spread to less than 25 micrometers)
  2. adequate strength
  3. low solubility
  4. reasonable setting time
  5. adequate working time
  6. cariostatic
  7. adhesion to tooth structure & restorative material
  8. high values for cyclic fatigue
  9. high values for strength
40
Q
A

Fixed Prosthodontics (13 decks)

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