Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

CSA > tooth coloured filling materials 2 > Flashcards

tooth coloured filling materials 2 Flashcards

1
Q

what are examples of cements

A

GIC
light cured glass ionomer cement
composer
composite

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

what can cements be

A

hydrophilic

or hydrophobic

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

describe glass polyalkenoates

A

formed as the result of a acid base reaction lion between fluoride containing glass and a poly acid- usually poly acrylic acid
they are adhesive
cariostatic

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

what is the composition of glass polyalkenoates

A

fluoro-alumino-phospho-silicate glass polyacid

eg polyacrylic acid or polymaleic acid

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

what are the disadvantages of poly alkenoates

A 
technique sensitive 
moisture sensitive 
cannot be placed in stress bearing areas 
low tensile and fracture toughness
poor wear resistance 
average aesthetics
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what does adding a acid + base equal

A

salt + water

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

what are the steps of the setting reaction

A 
decomposition 
migration 
gelation 
post set hardening
maturation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

how does the glass polyalkenoate bind to the collagen fibres

A

h+ ions

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

how does the glass polyalkenoate bind to the tooth surface

A

calcium ions and al3+ ions in a process called chelation

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

what happens in the maturation stage

A

al3+ salts precipitate for 24 hours
the setting process can continue for unto a year but very slowly
the formation of poly salts is continued

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

what happens to fluoride ions

A

not an integral part of the matrix and can be released without upsetting the structure of the cement

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

what role does water play

A

slowly hydrates the mature cross linked matrix
this leads to increase strength
improved translucency
increased resistance to desiccation

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

what can XS water lead to

A

CONTAMINATION

therefore increased opacity and decreased hardness

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

what happens if there is less water

A

desiccation

and more cracking and grazing

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

when are fluoride ions released

A

released by the acid attack from the glass

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

what does fluoride help with

A

contributes to the biocompatibility of the material and also the capacity to inhibit recurrent caries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

how does fluoride release

A

a rapid initial process

then a second slower much sustained process responsible for the long term release of fluoride

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what is the advantage of fluoride

A

prevents secondary caries as it promotes remineralisation

it is also the main reason for GIC replacement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what does plaque not thrive on

A

gic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

why does strep mutans not grow on GIC

A

due to fluoride being present

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

examples of alternative cements

A

diamondcarve

diamond 90

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what is diamondcarve and diamond90 based on

A

based on glass and co polymer of
polyvinyl phosphoric acid
polyacrylic acid

23
Q

give examples vicious glass polyalkenoates

A

fuji IX, ketac Molar, Hi Dense

24
Q

describe vicious glass polyalkenoates

A

higher powder:liquid ratio
lower water content
smaller glass particles
used in ART technique

25
what is the survival time on posterior teeth of amalgam
median survival time 11 years
26
what is the survival time on posterior teeth of GIC
MEDIAN survival time of 6 years
27
deserve resin modified GIC
RMGIC are glass ionomer cements with the addition of a small quantity of resin components
28
what is the % of resin in set cement
4.5-6%
29
what are the advantages of RMGIC
``` tooth coloured improved aesthetics medium fluoride release shorter setting decreased moisture improved tensile strength ```
30
what are the advantages of RMGIC part 2
``` sets on command better wear characteristics easier to use higher bond strength to composite fewer steps than composite can finish ```
31
describe modifications of conventional GICS
less water- it is replaced by a water/HEMA(hydroxyethyl methacrylate)
32
what is polyacid modified with
side chains that can polymerise by high curing mechanisms
33
what does the polymer also contain
polymerisable functional groups of COO and COOH which can be cured with blue light
34
what does HEMA stand for
hydroxyethylmethacrylate
35
disadvantages of HEMA
irritating to the eye and known contact allergen
36
how do we reduce the risk of allergic response to hema
minimise exposure | esp to uncured resin
37
clinically what is important when handling HEMA
protective gloves and no touch technique
38
what are the indications of RMGIC
cervical and root caries | base and abfraction lesions
39
what are the advantages of RMGIC
resistant to desiccation | can be contoured immediately
40
what is the composition of composites
``` bis-GMA UDMA EGDMA inorganic filler silane coupling agent uv stabilisers inhibitors ```
41
composition of detract
``` UDMA resin TCB resin strontium fluorsilicate glass initiators stabilisers ```
42
what are compomers made from
from from new monomers which contain acidic and acrylate groups
43
what does the setting mechanism 1st stage include
light curing induces the polymerisation of the resins
44
what does the setting mechanism 2nd stage include
after water uptake the acid base reaction takes place resulting in further cross linking of the matrix
45
pros of the setting mechanism
excellent handling command set good strength
46
cons of the setting mechanism
poor adhesion low fluoride release needs a bonding agent
47
what is the tensile strength of Fuji IILC
45 MPa
48
what is the tensile strength of VITREMER
75 MPa
49
what is the tensile strength of dyract
95 MPa
50
why do GPC restorations fail
due to recurrent caries
51
what % of GPC restorations fail due to recurrent caries
50%
52
describe chemfil rock
added zinc which makes it stronger tougher and earlier no need to condition the cavity no need to protect with varnish
53
describe new bioactive RMGIC
It chemically bonds to teeth, seals against bacterial microleakage, releases more fluoride and is more bioactive than glass ionomers, and is more durable and fracture resistant than composites

CSA (51 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions