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Flashcards in Adhesives Deck (57)
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1

What are sealants?

polymer coating to protect the teeth from further decay

2

What are the characteristic designs that allow for direct use?

light cured, flowable into pits

3

What is recommended to use before sealants to prepare the enamel?

etch

4

What is the major structural chemical used in sealant?

BidGMA-TEGDMA

5

Does sealant use fillers?

No

6

What type of bonding does the sealants have with the enamel?

mechanical

7

Are sealants meant to last a long time?

no but etching helps to extend longevity

8

What is macrotags?

larger interprism resin penetration
--- looks like small notches in enamel

9

What are microtags and what is their purpose?

smaller penetrations into the enamel that provide the major retention of the sealant

10

How does oxygen inhibit sealants/polymerization?

interferes with radical polymerization via termination
thinner layer = bigger problem

11

The an adhesive layer usually hydrophobic or hydrophilic?

Both in order to bond with enamel and dentin

12

Do adhesive possess acid or basic groups that promote bonding

acidic

13

Are adhesive filled or unfilled?

unfilled or lightly filled

14

What two properties must flowable materials balance?

viscosity and mechanical properties

15

How does the resin viscosity correlate with mechanical properties?

increase in mechanical properties = increase in viscosity

16

How does increasing filler load affect the viscosity and mechanical properties?

increases viscosity and improves mechanical properties

17

Where in the tooth-adhesive-composite model does adhesive failure occur?

above adhesive

18

Where in the tooth-adhesive-composite model does cohesive failure occur?

in the middle of the adhesive layer

19

Where in the tooth-adhesive-composite model does structural failure occur?

in the dentin

20

What structures can interfere with adhesive bonding to tubular dentin?

The smear layer and plug

21

What is the smear layer and plug composed of?

ground collagen and hydroxy-appetite

22

How many steps are total-etch adhesives?

2-3

23

How many steps are self-etch adhesives?

1-2

24

How many steps are RMGI adhesives?

1

25

What are the 4 traditional steps for dentin bonding?

etch, prime, adhesive, restoration

26

Is the primer hydrophobic or hydrophilic?

hydrophilic

27

Can glass-ionomers be a cement, base, and/or liner?

cement and base

28

Can zinc oxide eugenol be a cement, base, and/or liner?

all 3

29

Can calcium hydroxide be a cement, base, and/or liner?

liner and base

30

What is characteristic of cements?

used to bind restoration of appliances to tooth structure