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Fixed Prosthodontics I > Cements > Flashcards

Cements Flashcards

1
Q

What cements have an ACID-BASE setting mechanism?

A

zinc phosphate, polycarboxylate, glass ionomer

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2
Q

What cement has both an ACID-BASE and 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 for the following cements and include values:

  • zinc phosphate
  • polycarboxylate
  • glass ionomer
  • RMGI
  • Resin-based
  • self adhesion 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 minutes?

A

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

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8
Q

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

A

resin based and self-adhesive resin based

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9
Q

What cement has a setting time of 2 minutes?

A

RMGI

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10
Q

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

A

Polycarboxylate and 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 compressive strength? (first number)

A

RMGI (41-141)

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14
Q

What cement has the LOWEST tensile strength?

A

Zinc phosphate (3.1-4.5)

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15
Q

What cement has the highest tensile strength?

A

Self- adhesive (37-41)

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16
Q

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

A

Self-adhesive

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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 use 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 and self- adhesive resin based

23
Q

What cements have LOW solubility?

A

Glass ionomer

24
Q

What cements have a high rate of microleakage?

A

Zinc phosphate
Polycarboxylate (high to very high)

25
Q

What cement has a low to very high micro leakage rate (a large range)?

A

Glass ionomer

26
Q

What cements have VERY LOW micro leakage rates?

A

RMGI
Resin Based
Self-adhesive resin based

27
Q

Describe the removal of excess cement on the following:

  1. zinc phosphate
  2. poly carboxylate
  3. glass ionomer
  4. RMGI
  5. Resin based
  6. Self-adhesive resin based
A
  1. zinc phosphate- easy
  2. poly carboxylate- medium
  3. glass ionomer- medium
  4. RMGI- medium
  5. Resin based- difficult
  6. Self-adhesive resin based- difficult
28
Q

What cements have the highest retention?

A

Resin based and 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 display micromechanical bonding to tooth structure?

A

Resin based and self adhesive resin based

33
Q

How does RMGI bond to the tooth?

A

molecular and micro mechanical

34
Q

which cements display molecular only bonding to tooth surface?

A

Polycarboxylate and glass ionomer

35
Q

Zinc phosphate bonds to the tooth through:

A

Nonadhesive

36
Q

Which cements release fluoride?

A

glass ionomer and RMGI

37
Q

What are the ABSOLUTE NEEDS of cements:

A
  1. biocompatability
  2. inert and non-corrosive
  3. insolubility to acid attack
  4. dimension stability (minimal shrinkage and minimal expansion)
38
Q

What are the NEEDS of cements?

A
  1. set up quickly
  2. low surface tension
  3. adapts and 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 15 micrometers)
  2. adequate strength
  3. low solubility
  4. reasonable setting time
  5. adequate working time
  6. cariostatic
  7. adhesion to tooth structure and restorative material
  8. high values for cyclic fatigue
  9. high values for thermal cycling
  10. high values for strength
40
Q
A

Fixed Prosthodontics I (13 decks)

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