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Dental material > Dental pt5 > Flashcards

Dental pt5 Flashcards

1
Q

ZnO eugenol
flexibility
dental reporduction ability
dimensional stability
setting rxn
elastic/ non elastic impression material
dental cases used

A

NO
good
good
chelate forming rxn
non elastic
edentulous arch impression

(ZASP)

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2
Q

Gypsum
flexibility
dental reporduction ability
dimensional stability
setting rxn
elastic/ non elastic impression material
dental cases used

A

NO
good
good
hemihydrate + H2O -> dihydrate
non elastic
edentulous arch impression

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3
Q

Alginate
flexibility
dental reporduction ability
dimensional stability
setting rxn
elastic/ non elastic impression material
dental cases used

A

yes
good
bad
ion changing requires H2O
elastic + hydrocolloid irreversible
edentulous antagonistic study impression

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4
Q

Silicone doughable, flowable high viscosity
flexibility
dental reporduction ability
dimensional stability
setting rxn
elastic/ non elastic impression material
dental cases used

A

yes
very good
very good - NO by product
polymerization - free radical add.
elastic + elastomer
edentulous arches + crown bridge
removable partial denture

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5
Q

Polyether

A

yes
very good
very good
atomic ring opening add. poly.
elastic + elastomer
partial edentulous arches + crown bridge
removable partial denture

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6
Q

Dimension alginate after binding

A

shrinkage
distortion

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7
Q

Cause dimension change in alginate after binding

A

H2O evaporates

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8
Q

Charac polyether

A

hydrophilic -> adhere wet surface

(poly - belongs to nonaq elastic impression but it is hydroPHILIC)

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9
Q

Charac silicon

A

hydrophobic -> dry mouth

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10
Q

When to use colour additive

A

light at certain wavelengths

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11
Q

When to use colour subtractive

A

paint when colours added (pigment) -> black

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12
Q

Why remove cosmetics b4 tooth colour matching

A

disturbs colour vision

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13
Q

Confusing factors for tooth colour matching

A

colorful clothes
light source -> metamerism

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14
Q

Tree attributes of colour

A

hue
brightness
saturation

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15
Q

Zn oxide eugenol cement
mixing ratio
setting time
type setting
type cement
composition powder
composition liquid
use
material cause smell
accerlerate setting time

A

4 powder 3 liquid (my birtjday ->43)
10-15min
chelate forming rxn
phenolate based cement
ZnO + Zn salt
Eugenol
cavity liner + temp filling material (
eugenol -> anodyne effect (eugenol -> eugene -> smells)
alcohol + water + acetic acid + more powder (eugenol -> eugene -> drinks alcohol -> acetic acid -> need water as well -> needs food -> powder)

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16
Q

Glass ionomer cement
mixing ratio
setting time
type setting
type cement
composition powder
composition liquid
indications
biological effects

A

1 powder 2 liquid
9min
acid base rxn (glass -> no scared acid -> acid base rxn)
polycarboxylate
Ca-Al-F-Si + glass
polyacrylic acid + tartaric acid + itoconic acid
cavity liner + luting agent + pediatric filling material + core buildup
F ion -> prevents cavity
antibiotic effect

17
Q

Zn polycarboxylate cement
mixing ratio
setting time
type setting
type cement
composition powder
composition liquid
indications
biological effects

A

4 powder 5 liquid
6min
chelate forming rxn
polycarboxylate
ZnO
polycarboxylate acid/ poly acrylic acid
cavity liner + bonding agent + good adhesion + temporary filling material
less acidic than Zn phosphate

18
Q

Zn phosphate cement
mixing ratio
setting time
type setting
type cement
composition powder
composition liquid
indications
biological effects

A

3 powder 4 liquid
2min
chelate forming
phosphate based
ZnO, MgO
H3PO4
cavity liner + luting agent + temporary filling material
low adhesion

19
Q

Ca(OH2)

A

1:1 paste
4min
chelate forming
phenolate based
paste1 Ca(OH)2, ZnO, Zn salts in ethylene toulene sulphonamide paste2 Ca sulfate, Titanium Oxide, Ca tungstate in liquid disalicilate ester butane -1,3 diol

cavity liner + pulp protection
weak -> dissolved in saliva

Dental material (7 decks)

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