Quiz 8

Question 1

What classification of cement adheres one surface to another?

Answer 1

Type I: luting agent

Question 1

What classification of cement is used to temporarily restore a tooth?

Answer 1

Type II: Provisional/intermediate restorations

Question 2

What classification of cement is used for pulpal protection?

Answer 2

Type III: Liners & Bases

Question 3

How long is a provisional restoration used?

Answer 3

Couple weeks

Question 4

How long is an intermediate restoration used?

Answer 4

Up to a year

Question 5

What are the 3 differences of dental cements?

Answer 5

-Intended use
-Type/amount of ingredients
-Some cements mixed thicker or temporarily restore a tooth

Question 6

What is primary consistency?

Answer 6

Lower viscosity

Question 7

What is secondary consistency?

Answer 7

Thicker, putty-like

Question 8

What is the main goal of a type I cement: luting agent?
-What’s the other function?

Answer 8

Retain a restoration
Prevent microleakage

Question 9

What are the properties of dental cement?

Answer 9

 Strength
 Solubility
 Viscosity
 Biocompatibility
 Retention
 Esthetics
 Radiopacity
 Ease of manipulation
 Anticariogenic properties

Question 10

What cement is not frequently used as permanent restorations?

Answer 10

Type II: provisional/intermediate

Question 11

What is thicker than primary consistency?

Answer 11

Secondary consistency

Question 12

What cement is used to seal and medicate pulp (thin)?

Answer 12

Type III: Liners

Question 13

What are 3 types of Type III cement: Liners?

Answer 13

Calcium hydroxide
Resin-modified glass ionomer
Bonding agent

Question 14

stimulates reparative dentin and protects when cavity prep is close to pulp (indirect or direct pulp cap)

Answer 14

Calcium hydroxide

Question 15

What is an indirect pulp cap?

Answer 15

Not in pulp cap yet

Question 16

What is a direct pulp cap?

Answer 16

right on top of pulp chamber

Question 17

Seals tubules and releases fluoride
-Most commonly used today

Answer 17

Resin-modified glass ionomer

Question 18

Seal dentinal tubules

Answer 18

Bonding agent

Question 19

Used to provide thermal insulation or mechanical support for pulp, thick

Answer 19

Type III cement: Bases

Question 20

What are the 2 types of Type III cement: Bases?

Answer 20

Low-strength
High-strength

Question 21

What is a low-strength base?

Answer 21

Zinc-oxide eugenol ZOE

Question 22

What are the high-strength bases?

Answer 22

Reinforced ZOE
zinc phosphate
polycarboxylate
glass ionomer
resin-modified glass ionomer
resin

Question 23

What are the dental cement liquids?

Answer 23

Eugenol
Phosphoric acid
Polyacrylic acid

Question 24

 Organic, weak acid, oil of cloves  Obtundent: sedative to pulp  Not used with composites

Answer 24

Eugenol

Question 25

 Very acidic, irritating to tissues  Humidity affects mix  Discard liquid if cloudy

Answer 25

Phosphoric acid

Question 26

 Half water  Very viscous  Dispense only when ready to mix  Dispense carefully as drops run together, distorts amount

Answer 26

Polyacrylic acid

Question 27

What are the 2 dental cement powders?

Answer 27

Zinc oxide Powdered glass

Question 28

 Aluminum oxide added for strength  Magnesium oxide added to extend working time

Answer 28

Zinc oxide

Question 29

 Silicon oxide with added sodium, calcium, and potassium oxides to mix with acid  Fluoride added

Answer 29

Powdered glass

Question 30

What is the resulting cement of eugenol + zinc oxide powder?

Answer 30

Zinc oxide-eugenol ZOE

Question 31

What is the resulting cement of eugenol + glass powder?

Answer 31

No reaction

Question 32

What is the resulting cement of phosphoric acid + Zinc oxide powder?

Answer 32

Zinc phosphate cement

Question 33

What is the resulting cement of phosphoric acid + glass powder?

Answer 33

Silicate cement

Question 34

What is the resulting cement of polyacrylic acid + zinc oxide powder?

Answer 34

Polycarboxylate cement

Question 35

What is the resulting cement of polyacrylic acid + glass powder?

Answer 35

Glass ionomer cement

Question 36

powder/liquid ratio depends on use

Answer 36

ZOE + zinc phosphate

Question 37

Determined by manufacturer *Mix too slow = too thick and decreased adhesion*

Answer 37

Polycarboxylate + glass ionomer

Question 38

o Used when strength/solubility not critically important *High solubility o Paste/paste or liquid/powder mixes o Consistency: lutes to 1 inch string (stretch) o Uses: temporary fillings, bases, sedative effects *Not used with composites o Smooth & creamy o Clean up with baking soda/water

Answer 38

Zinc oxide-eugenol ZOE

Question 39

o Oldest cement, not widely used (soluble, weaker than newer cements) o Thinner/thicker mix determined by intended use o Exothermic reaction when mixed *Mix incrementally on cool glass slab o Acidic until set = irritating to pulp *Liner/varnish used first o Consistency: lutes to 1 inch string o Uses: luting indirect restorations, as base if liner/varnish used

Answer 39

Zinc phosphate cement

Question 40

o Old cement o No longer used today o Acidic, irritating to pulp o Soluble, leaked o Once used for esthetic restorations

Answer 40

Silicate cement

Question 41

o First cements with adhesive bond to tooth structure o Minimal irritation to pulp o Not very strong, higher solubility compared to glass ionomers/resin cements o Place when mix still glossy (do not use if no glass/cobwebs) *Short working time o Uses: long-term temporary cements, final cementation of indirect restorations

Answer 41

Polycarboxylate cement

Question 42

o Developed as an alternative to silicate cement o Popular today for fluoride release and sealing dentin, bonds to tooth structure o Most popular for luting metal and PFM crowns o Resin-modified glass ionomer cements strongest, least soluble o Uses: restorations, bases, liners, cements, class V restorations o Powder/liquid or capsule/gun dispensed o Cement when glossy, loss of adhesion if no gloss o Clean quickly with alcohol

Answer 42

Glass ionomer cement

Question 43

o Composites with high resin/low filler content (low viscosity) o Bond restorations to tooth structure o Uses: bonding ceramic restorations, crowns/bridges, bonding ortho brackets o Useful for recementing poor/ill-fitting crowns o Insoluble in mouth, superior bond strength to enamel/dentin o Paste/paste systems, mixed on paper pad

Answer 43

Resin-based (composite) cement

Question 44

o Cement used as surgical dressing o Paste/paste system o ZOE once used * Irritating to tissue, damage to exposed bone o No eugenol in current formulations

Answer 44

Temporary cement / Perio pack