Cements

Question 1

What cements have an ACID-BASE setting mechanism?

Answer 1

zinc phosphate, polycarboxylate, glass ionomer

Question 2

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

Answer 2

RMGI

Question 3

What cements have a POLYMERIZATION setting mechanism?

Answer 3

Resin based & Self-adhesive resin based

Question 4

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

Answer 4

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:

Question 5

Which cement has the greatest film thickness?

Answer 5

Resin based

Question 6

Which cement has the least amount of film thickness?

Answer 6

Glass ionomer

Question 7

Which cements have working times of up to 5 minutes?

Answer 7

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

Question 8

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

Answer 8

resin based and self-adhesive resin based

Question 9

What cement has a setting time of 2 minutes?

Answer 9

RMGI

Question 10

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

Answer 10

Polycarboxylate and Glass ionomer

Question 11

What cement has the GREATEST compressive strength?

Answer 11

Self-adhesive resin based 200-240

Question 12

What cement has the LOWEST maximum compressive strength

Answer 12

Polycarboxylate 67-91

Question 13

What cement has the ability to have the lowest compressive strength? (first number)

Answer 13

RMGI (41-141)

Question 14

What cement has the LOWEST tensile strength?

Answer 14

Zinc phosphate (3.1-4.5)

Question 15

What cement has the highest tensile strength?

Answer 15

Self- adhesive (37-41)

Question 16

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

Answer 16

Self-adhesive

Question 17

Describe the pulp irritation caused by the following cements:

• glass ionomer
• RMGI
• Resin based
• Self-adhesive resin based

Answer 17

HIGH

Question 18

Describe the pulp irritation caused by the following cements:

Zinc phosphate

Answer 18

Moderate

Question 19

Describe the pulp irritation caused by the following cements:

Polycarboxylate:

Answer 19

Low

Question 20

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

Answer 20

Polycarboxylate

Question 21

What cements have High solubility?

Answer 21

Zinc phosphate & polycarboxylate

Question 22

What cements have VERY LOW solubility:

Answer 22

RMGI, Resin-based and self- adhesive resin based

Question 23

What cements have LOW solubility?

Answer 23

Glass ionomer

Question 24

What cements have a high rate of microleakage?

Answer 24

Zinc phosphate
Polycarboxylate (high to very high)

Question 25

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

Answer 25

Glass ionomer

Question 26

What cements have VERY LOW micro leakage rates?

Answer 26

RMGI Resin Based Self-adhesive resin based

Question 27

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

Answer 27

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

Question 28

What cements have the highest retention?

Answer 28

Resin based and self- adhesive resin based

Question 29

What cements have moderate retention?

Answer 29

Zinc phosphate & RMGI

Question 30

What cement has moderate to high retention?

Answer 30

Glass ionomer

Question 31

What cement has low to moderate retention?

Answer 31

Polycarboxylate

Question 32

What cements display micromechanical bonding to tooth structure?

Answer 32

Resin based and self adhesive resin based

Question 33

How does RMGI bond to the tooth?

Answer 33

molecular and micro mechanical

Question 34

which cements display molecular only bonding to tooth surface?

Answer 34

Polycarboxylate and glass ionomer

Question 35

Zinc phosphate bonds to the tooth through:

Answer 35

Nonadhesive

Question 36

Which cements release fluoride?

Answer 36

glass ionomer and RMGI

Question 37

What are the ABSOLUTE NEEDS of cements:

Answer 37

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

Question 38

What are the NEEDS of cements?

Answer 38

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

Question 39

What are the WANTS of cements?

Answer 39

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