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Fizy. > Dental Mat. > Flashcards

Dental Mat. Flashcards

1
Q

Requirements, purpose of the Intermediate Restoration

A

Esthetic, economicql,dimensional Stable, insoluable
Purpose= Maintain tooth position and prevent occlusal changes, esthetic, prevent gingival inflammation

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2
Q

gold standard material

A

Zinc phosphate cement

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3
Q

oldest and most widely used cements,

A

Zinc phosphate cement

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4
Q

Zinc phosphate cement powder and liquidi

A

powder are zinc oxide and magnesium oxide
Liquid = phosphoric acid and water

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5
Q

Which cement is not suitable for use in deep cavities close to pulp.

A

Zinc phosphate cement

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6
Q

Lack of anticariogenic effect, low pH

A

Zinc phosphate cement

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7
Q

Rest. Material volume fazla olursa ne olur?

A

Dim. Change
Polimerizasyon
Pressure. Bu yüzden CEMENT kullanılır

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8
Q

Zinc oxide C.in powder liquidinin reaktivitesini azaltır
Act as buffer

A

Alimunium-zinc

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9
Q

Zinc oxide
Low temp. Longer working time
Bu avantaj neden?

A

It allows incorparation of Power and liquid
so it lead to greater compressive stength and lower solubility

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10
Q

Why powder shoul be divide into increments

A

Slow neutralization
Control reaction

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11
Q

While setting of cement is taking place, water
contamination should be avoided. If it contaminate, What will happen?

A

If water cont. Ocurs befıre cement hardened, cement loose chemical properties.
Phosphoric acid leaches out and solubility increases

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12
Q

Geçici rest. 6 haftada çıkarılmazsa nolur

A

Hypersensitivity

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13
Q

Anestezik özelliğe sahip tek cement

A

Eugenol

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14
Q

Asit baz reaction cement

A

Zinc phosphate

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15
Q

Sedative effect, better marginal seal

A

Zinc oxide eugenol

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16
Q

Base material olarak eugenol kullanılmaz. Resinleirn altına glass ionemer ve ca hidroksit

A
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17
Q

reaction progresses more rapidly in humidconditions.

A

zinc eugenol

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18
Q

one of the most soluble cements.

A

Eugenol

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19
Q

: To improve the strength of setting mat. İnTo liquid of zinc
oxide eugenol cements

A

EBA (Ortho-ethoxybenzoic acid) cement

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20
Q

PH=2 pH=7 cement

A

Zinc phosphate, zinc oxide eugenol

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21
Q

Eugenol do not adhere well to enamel or dentin

A
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22
Q

Suitable for deep cavities

A

Eugenol, ca hidroksit

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23
Q

Hangi materyalin dezavantajları=
Highly soluable, low strength, low setting time, low compressive strength olmasıdır

A

Eugenol

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24
Q

Least irritsting cement
Most palliative agent to pulp
Soothing effect (obtundent)

A

ZOE

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25
Q

ZOE cements should not be used as a base under resin-based fillers-
composites. Çünkü Resini yumuşatır

A
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26
Q

It was one of the first chemically adhesive dental material

A

Zinc Polikarboskilat

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27
Q

Powder liquid arası asit baz reaksiyonu veren=

A

polikarboksilat, zinc phosphate

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28
Q

Diğer adı Polyacrylate cement
Liquid=polyacrylic acid
Powder=zinc oxide, magnesium oxide

A

Zin Polycarboxylate cement

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29
Q

Polycarboxylate cementin anticariogenic effects yok

A
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30
Q

Hangi cement ortodontide kullanbılabilir

A

Zinc Polycarboxylate
Adhere metal excellent

31
Q

Porselen hangi materyalde tercih edilmez

A

Zinc Polycarboxylate

32
Q

.why zinc Polycarboxylate shows excellent biocompatibility?

A

The size of polyacrylic acid molecule is bigger, this makes it less favorable to
disperse into the dentinal tubules
The pH of the cement rises more rapidly when compared to that of zinc phosphate

33
Q

Silicate Cem. Hangi materyallerin geliştirilmesini sağlar?

A

Glass ionemer
Composite resin

34
Q

Which cements are not used nowadays

A

Silicate cement
Zinc silicophosphate cement

35
Q

.Dezavantaj = There was a space between material and tooth. -Stained
-İrritant to pulp. Due to low pH
-radiolucent
-soluable
-Thermal expansion coefficient is close to enamel tissue.
Avantaj= anticaiogenic effect
-Translucent. İnitial esthetics is good

A

Silicate cement

36
Q

Powder; acid soluble silicate, zinc and magnesium oxides.
Liquid; is phosphoric acid.

A

Zinc silicophosphate cements

37
Q

Translucent and more esthetic than zinc phosphate cement
Anticariogenic because of fluoride release
Has sufficient strength.

Dezavantaj=
Soluable

A

Zinc Silicophosphate Cements

38
Q

Stone cement

A

Zinc silicophosphate

39
Q

Suspensions of zinc oxide ör calciumhydroxide in alcohol or chloroform

A

Cavity liners

40
Q

Thin film on prepared tooth surface, sharp smell

A

Cavity liner

41
Q

Not mechanical resistance
Can not provide heat insulation( so is not used under amalgam filling
* Melts in mouth fluids. Soluable
Hypersensitivityi azaltır

A

Cavity liner

42
Q

Thin Resin film

A

cavity varnish

43
Q

Hangi material amalgamın dentinal tubule e girmesini engeller

A

Cavity varnish, it serves as a barrier between the restoration and the dentinal tubules.

44
Q

Cavity Varnish hangi maddelerle kullanılmamalı

A

Composite resin
Glass ionemer

45
Q

Should not be used in cavitated carious lesions, but can be used to remineralize white spot lesions

A

Flor varnish

46
Q

PH=11cement

A

Calcium hyroxide

47
Q

Relatively Weak cement used as pulp capping

A

Calcium hydroxide

48
Q

Dycal,(paste form of calcium hydroxide) shallow cavityde kullanılır mı?

A

Hayır, deep cavityde

49
Q

Applications
1. For pulp capping.
2. As low strength bases beneath restorations for pulp protection.
3. Apexification procedure in permanent teeth where root formation is incomplete.
4. In the treatment of root canal

A

Calcium hydroxide

50
Q

Poor mechanical properties
Low compressive tensile strength
High Solubility

A

Calcium hydroxide

51
Q

Formation of tertiary dentin: antibacterial
and protein lysing effect helps in the formation of reparative dentin.
.

A

Calcium hydroxide

52
Q

Texture friend
PH=11
Hemostatic effect
Pulp capping agent

A

Calcium hydroxide

53
Q

Criteria for pulp capping agent

A

-pulp should be healthy
-exposure 0.5mmden fazla olmamalı
-this tooth should be isolated

54
Q

If perforation is small=
There is no perforation, near to pulp=

A

Direct pulp capping
Indirect

55
Q

Resinlerin altına öjanol base mat. Olarak kullanılmaz. Glass ionemer ve Ca hidroksit base mat olarak kullanılır. Çünkü çok soluable ve resin polimerizasyonuna müdahale eder.

A
56
Q

Öjanol kısa dönem zinc phosphate uzun dönem için iyi. Öjanol low strength, zinc phosphate high strength

A
57
Q

Major element in amalgam
Decreases creep
Reducing fluency
Diğer her şeyi artırır
İncreases tarnish resistance

A

Silver

58
Q

Controls the reaction between silver and mercury
Facilitates amalgamation
Diğer her şeyi azaltır

A

Tin

59
Q

Amalgamda tin olmasa ne olurdu

A

Reaction would be so fast

60
Q

Amalgamın sert olmasını sağlar -stifness
Resolution is low

A

Copper

61
Q

Deoxidizer
Give more plastic property to amalgam. … sız amalgam less plastic
Easy machining alloy

A

Zinc

62
Q

Creepi azaltanlar

A

Palladium indium silver

63
Q

İncrease corrosion resistance in amalgam
Amalgamın mekanik özelliklerini arttırır

A

Palladium

64
Q

Reduces mercury vapor
Reduces early strength

A

İndium

65
Q

Hg miktar
Excessive mercury causes…

A

43-50
Expansion

66
Q

Gamma 2 phase weakest copper eklenir

A
67
Q

Mixing amalgam powder with mercury

A

Trituration

68
Q

a continuation of trituration. It improves the homogeneity of the mass and get a single consistent mix.

A

Mulling

69
Q

Aims of condensation

A
  1. To compact the mass to increase the density of the restoration.
  2. To reduce voids.
  3. To remove excess mercury.
  4. To adapt the amalgam to the preparation walls .
70
Q

Function of burnishing

A

After carving or before it smoothes restoration

71
Q

Function of polishing
Polish yapılmazsa nolur

A

Polishing prevents plaque accumulation and minimizes corrosion. Paste formda yapılmalı

72
Q

Advantage of …
Physical and mechanical performance is better than unfilled acrylic resins.
Disadvantages:
Rough surface finish
Poor polishibility
More wear
® More prone to staining.

A

conventional composite:macrofi

73
Q

Microfil resin dezavantaj.

A

Poor mechanical properties due to more matrix content
Poor color stability
Low wear resistance
Less modulus of elasticity and tensile strength
More water absorption
High coefficient of thermal expansion.

74
Q

hybrid composites dezavantaj.=

A

Disadvantages of hybrid composites
# Not appropriate for heavy stress bearing areas
# Not highly polishable as microfilled
# Loss of gloss occurs when exposed to abrasive toothpaste.

Fizy. (7 decks)

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