cements and their uses

Question 1

6 types of cements:

Answer 1

zinc phosphate
zinc oxide eugenol
zinc polycarboxylate
glass ionomer
resin-modified glass ionomer
provisional cements

Question 2

no cement will perform to it’s optimal level clinically without an _______that includes good resistance and retention form

Answer 2

adequate preparation

Question 3

8 pros of cement

Answer 3

biocompatibility
retention
mechanical properties (withstand occlusal forces, high tensile strength)
marginal seal
low film thickness
ease of use
radiopacity
esthetics

Question 4

zinc phosphate advantage

Answer 4

thin film thickness and proven reliability

low solubility which resists breakdown in the mouth

low thermo-conductivity (less sens to hot and cold)

Question 5

zinc phosphate disadvantage

Answer 5

initial low pH can lead to pulpal irritation

no chemical adhesion/bond
no antibacterial properties
poor esthetics (for all porcelain)
long setting time 2.5-8mins
exothermic- chilled glass slabs when mixing, small amounts of powder added to liquid

Question 6

two types of zinc oxide eugenol cement

Answer 6

type I- less strong and is used for temporary restorations and for temporary cementation (temp-bond)

type 2- is reinforced and is stronger
it is referred to as an intermediate restorative
can last for 6-12 months in the mouth
-used for a tooth that cannot be restored immediately (IRM)

Question 7

benefits of ZOE (zinc oxide eugenol cement

Answer 7

neutral pH
has sedative or soothing effect on the dental pulp
protective or insulating base or liner is not required

Question 8

when is insulating base or liner not required

Answer 8

with zoe

Question 9

not used under composite or acrylic restorations because is incompatible with these materials and retards their setting process

Answer 9

zinc oxide eugenol

Question 10

mixing time for ZOE
and setting time

Answer 10

30-60 seconds
3-5 min setting time

Question 11

cement was developed in 1968 to circumvent pulpal problems associated with LOW pH

Answer 11

zine polycarboxylate

Question 12

first cementing system to obtain adhesive agent that bonded to enamel and dentin

Answer 12

zinc polycarboxylate

Question 13

shorter working time of 2.5 mins
mixed 3-40 seconds (needs to be mixed quick

Answer 13

zinc polycarboxylate

Question 14

zinc polycarboxylate can having poor marginal sealings to due to

Answer 14

film thickness

Question 15

zinc polycarboxylate can bond to most alloys but not to

Answer 15

gold

Question 16

used now as permanent temp crown

Answer 16

polycarboxylate

Question 17

known as an acid-base cement

Answer 17

glass ionomer

Question 18

performance of this is good even if they have not been correctly mixed

Answer 18

glass ionomer

Question 19

one of the most important advantages of glass ionomer

Answer 19

fluoride release

Question 20

in glass ionomer, working time can affect_________
longer working time allows:

Answer 20

film thickness

longer working time= allows more flow and will aid in seating the restoration

Question 21

extremely important in glass ionomers than mixing and placement of the cement is completed within

Answer 21

2-2.5 mins

Question 22

glass ionomer ____film thickness

Answer 22

very thin

Question 23

created in early 1990 to overcome high solubility of glass ionomer

Answer 23

resin modified glass ionomer

Question 24

disadvantage of resin modified glass ionomer

Answer 24

low early strength and moisture sens during setting

Question 25

how long do resin-modified glass ionomer take for final set

Answer 25

24 hours

Question 26

most temp/provisional cements have ____ although it can have anegative effect on acrylic resins and composite resin cements

Answer 26

ZOE

Question 27

eugenol provides ____effects for tmep

Answer 27

antibacterial

Question 28

when selecting provisional/temp cements

Answer 28

how long
how retentive
what will permanent cement be
working in esthetic zone