Dental Materials Cements

Front 1

What is cementation in dentistry?

Back 1

Attaching a restoration to natural teeth.

Front 2

What are the applications of cements?

Back 2

1. Luting agents-to bond preformed restorations & ortho materials
2. Cavity liners & bases-to protect the pulp and foundations for restorations
3. Restorative materials

Front 3

What are the 3 classes of cements?

Back 3

1. Water based
2. Oil based
3. Resin based

Front 4

What is provilink?
What are its characteristics?

Back 4

A dual-curing temporary cement

Cleans easily
Good retention
If you try to clean excess before curing, it will leak
Shade A1

Front 5

What are the characteristics of glass ionomer cements?

Back 5

*Good biocompatibility
*Adheres to enamel & dentin
***It may have anticariogenic effect (release of fluoride)***
*Translucent cement
*High mechanical properties
*Susceptible to moisture contamination

Front 6

What is the film thickness of glass ionomer cements?

Back 6

22-24 microns

Front 7

Glass ionomer cement...opaque, translucent or transparent?

Back 7

Radiolucent.

Front 8

What is the composition of glass ionomer cement?

Back 8

Finely ground aluminosilicate glass, polycarboxylate copolymer (liquid) & water.

A water-based cement.

Front 9

What is the most popular indication for glass ionomers?

Back 9

Retention of alloy restorations.

Front 10

How is a hybrid ionomer different from a glass ionomer?

Back 10

Is glass reinforced with resin-stronger

It should be avoided with all-ceramic restorations( associated with fractur)

Expensive

Front 11

What is the composition of hybrid ionomer?

Back 11

Powder:
Radiopaque fluoroaluminosilicate glass & microencapsulated catalyst system
Liquid:
Polycarboxylic and tartaric acid
Pendant methacrylate groups
HEMA

Front 12

What is the thickness of RelyX Luting, 3M ESPE?

Back 12

25 microns

Front 13

Zinc Polycarboxylate:
What is its film thickness?
What is its main advantage?

Back 13

25-48 microns
One of the cheaper cements

Front 14

What is the composition of zinc polycarboxylate?

Back 14

Powder:
Zinc oxide
Liquid:
Polyacrylic acid
Water (water based)

Front 15

Zinc Polycarboxylate:
Advantages & disadvantages?

Back 15

Adv:
1. Film thickness is between 25-48 microns
2. Relative biocompatibility
Dis:
1. High viscosity (difficult to mix)
2. Inferior long-term retention
3. Short working time
4. More difficult to remove and provides less retention than zinc phosphate

Front 16

What are the indications for zinc polycarboxylate?

Back 16

1. Retention of alloy restorations
2. Retention of orthodontic bands
3. High strength bases (Less irritating to the pulp)

Front 17

What is the composition of Zinc Phosphate?

Back 17

Powder: Zinc oxide, Magnesium oxide, Pigments

Liquid: Phosphoric acid, Water (Al-Zn ions)

Front 18

Zinc Phosphate:
Advantages & disadvantages?

Back 18

Adv:
Adequate strength
25 micrometers film thickness
Reasonable working time
Excess is easily removed
Low cost
Acceptable effect over the dental pulp
Most popular cast for restorations

Dis:
High Acidity

Front 19

What are the indications for Zinc Phosphate?

Back 19

1. Retention of alloy restorations
2. Retention of orthodontic bands
3. High-strength bases
4. Provisional retorations

Front 20

Studies have shown zinc phosphate can successfully serve as a luting agent for as many as ________ years in select clinical situations.

Back 20

20 years

Front 21

What is the composition of Zinc Oxide-Eugenol?

Back 21

Powder:
Zinc oxide, Rosin, Zinc acetate

Liquid:
Eugenol

Front 22

Zinc Oxide-Eugenol:
Advantages & disadvantages?

Back 22

Adv:
Good biocompatibility
Excellent seal
Film thickness 25-35 micrometers
Easy to remove

Dis:
Inferior physical properties
Short working time

Front 23

What are the indications of Zinc Oxide-Eugenol?

Back 23

1. Low and high-strength bases
2. Provisional restorations
3. Temporary and permanent retention of restorations

Front 24

Zinc Oxide with EBA:
Advantages & disadvantages?

Back 24

Adv:
Improved compressive strength
Good biocompatibility & pulp protection

Dis:
Short working time
Excess of material is difficult to remove

Front 25

What is the composition of Zinc Oxide with EBA?

Back 25

Powder:
Zinc oxide, Rosin, Zinc acetate

Liquid:
2-ethoxybenzoic acid (EBA)

Front 26

What are the indications of Non-eugenol zinc oxide (EBA)?

Back 26

1. Temporary retention of restorations
2. Root canal sealers
3. Gingival tissue packs
4. Surgical dressings

Front 27

What is the composition of Self-curing Calcium Hydroxide?

Back 27

Base paste:
Calcium tungstate, calcium phosphate, zinc oxide, glycol salicylate

Catalyst paste: Calcium hydroxide, zinc oxide

Front 28

What is the composition of light-curing Calcium Hydroxide?

Back 28

Urethane dimethacrylate resin, calcium hydroxide, barium sulfate fillers, monomer

Front 29

Calcium Hydroxide:
Advantages & disadvantages?

Back 29

Adv:
* Stimulate the formation of reparative dentin *
Low thermal conductivity
Stronger than zinc oxide-eugenol

Dis:
Low mechanical properties

Front 30

What are the indications for Calcium Hydroxide?

Back 30

1. Low-strength base
2. Temporary retention of restorations
3. Used for direct and indirect pulp capping
4. Protective barrier beneath composite restorations (protect the pulp)

Front 31

What is the composition of composite and adhesive resins?

Back 31

Dimethacrylate resin, Glass filler, microhybrid and microfilled

Front 32

Composites and adhesive resins:
Advantages & disadvantages?

Back 32

Adv:
Capable of bonding chemically to dentin
Film thickness 13-20 micrometers
More esthetics
Acceptable biocompatibility
High cost

Front 33

What are the indications of composite and adhesive resins?

Back 33

1. Bonded conventional crown & bridge
2. Bonded ceramic and composite veneers, inlays & onlays
3. Bonded post & cores
4. Bonded Maryland bridges
5. Retention of provisional restorations
6. Retention of orthodontic brackets
7. High-strength bases

Front 34

What is the composition of compomer?

Back 34

Powder:
Strontium Al fluorosilicate glass, Sodium fluoride, self-cured & light-cured initiators
Liquid:
Polymerizable methacrylate-carboxylic acid monomer, multifunct. acrylate-phosphate monomer, diacrylate monomer, water

Front 35

4 Characteristics of compomer?

Back 35

1. High mechanical properties
2. Low solubility
3. Sustained fluoride release *
4. Can be recharged with fluoride

Front 36

What are the indications of compomer?

Back 36

1. Cementation of cast alloy inlays onlays, crowns & bridges, PFM
2. *Contraindicated for all-ceramic restorations * (because of expansion)

Front 37

Glass ionomer cements vs. Resin cements: Which has the higher compressive strength?

Back 37

Resin

Front 38

The ideal luting agent:
Working time?
Adherence?
Seal?
Pulp compatibility?
Strength?

Back 38

Long working time
Adheres well to both tooth structure and cast alloy
Provides a good seal
Nontoxic to the pulp
Adequate strength properties

Front 39

Ideal luting cement:
Viscosity?
Solubility?
Working and setting time?
Excess?
Cost?

Back 39

Compressible into thin layers
Low viscosity and solubility
Good working and setting characteristics
Any excess can be easily removed
Inexpensive

BTW-it does not exist

Front 40

How do you prepare a tooth for cementation?

Back 40

Avoid contamination of material with water, blood or saliva
Both restoration and tooth should be dry
Do not overdry-could damage odontoblasts
Isolate the area
Tooth should not be desiccated (dried excessively)
With non-adhesive cement, use cavity varnish or dentin bonding resin

Front 41

What is the frozen slab technique?

Back 41

Technique used to increase the working time yet reduce the setting time of zinc phosphate cement.

Front 42

Resin luting agents:
For veneers?
For inlays & onlays?
For full ceramic crowns?

Back 42

Veneers-light cured
Inlays or onlays-chemical or dual cure material
Full ceramic crown-chemical or dual cure material