bonding to teeth Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

what properties do you want for a dental adhesive?

A
provide high bond strength to tooth tissues
immediate high strength bond
durable bond
impermeable bond
easy to use 
safe
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what effect does the acid in acid etch have on the surface of enamel

A

roughens surface producing etched pattern

this rough surface allows micro mechanical interlocking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

is enamel bonding mechanical or chemical?

A

mechanical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

after enamel is etched which substance is applied?

A

resin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

why is bonding to dentine more complicated than enamel?

A

smear layer in dentine
dentinal fluid
low surface energy in dentine
dentine is hydrophilic and most bonding agents are hydrophobic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what bonding forces are used to bond to dentine?

A

Van Der Waals forces and mechanical bonding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

does wet dentine have a low or high surface energy?

A

low

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

composite has a higher surface energy than dentine, in order for it to adhere, dentine surface energy will have to increase greater than that of composite, how is this achieved?

A

bonding agent will increase surface energy of dentine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

which substance removes the smear layer?

A

acid etch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

name the 3 components of total etch

A

dentine conditioner
primer
adhesive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what purpose does dentine conditioner have?

A

removes smear layer opening dentinal tubules

decalcifies upper most layer of dentine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

dentine primer has a hydrophobic and hydrophilic end, which end binds what?

A

hydrophilic end binds hydrophilic dentine

hydrophobic end binds resin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

name a coupling agent found in dentine primers?

A

HEMA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what are the problems with total etch?

A

removes all hydroxyapatite
collapse of collagen fibres so resin can penetrate
creates deep etch a primer cannot penetrate
moisture dependant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

total etch application consists of how many steps?

A

2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what type of etch technique is most common?

A

separate etchant with combined primer and sealer

17
Q

which etch technique does not attempt to remove the smear layer/

A

self etch

18
Q

what is the downside of self etch?

A

bondto dentine not as strong as other techniques

materials with low ph may not etch enamel

19
Q

what is a pro of self etch?

A

less technique sensitive than other techniques

less chance of post op sensitivity

20
Q

mineral exchange where minerals are removed from dental hard tissue and replaced with resin which once mineralised mechanically interlocks in the porsities is known as?

A

molecular entanglement