Dental Materials MCQs

Page No. 16

Which is not present in porcelain________________?


aSilica

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bFeldspar

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cCalcium carbonate

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dAmorphous material

✓


View Answer Amorphous material

Flux used in dental ceramic is________________?


aAlumina

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bSilica

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cKaolin

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dBoric oxide

✓


View Answer Boric oxide

Opaque porcelain________________?


aIs Feldspathic glass

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bContains opacifier like zirconium and titanium oxide

✓


cNot used to mask the colour of the cement used in placing of restoration

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dUsed to produce the characteristic translucence, which is an inherent aspect of the incisal edge in natural teeth

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Dicor restoration is_______________?


aTwo coloured restorations

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bHeat pressed ceramic

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cCastabel ceramic

✓


dNone of the above

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View Answer Castabel ceramic

Porcelain binds to metal in PFM crown by_________________?


aMetallic bond

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bTransparency

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cChemical bond

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dBoth B and C

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View Answer Both B and C

In method of firing: A shorter firing period at a higher temperature is considered better_______________?


aA long firing period at a very low temperature is preferred

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bA long firing period at a very high temperature is preferred

✓


cA short firing period at a very low temperature is preferred

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dNone of these

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Quartz is Dental porcelain is______________?


aStrengthener

✓


bBinder

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cPigment

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dCrack minimzer

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View Answer Strengthener

Which of the following bur is used in the preparation of cavity restored with porcelain fused to metal ?


aCarbide bur

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bDiamond bur

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cStainless steel bur

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dDiamond but for porcelain and carbide bur for metal

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The first porcelain tooth material was introduced by______________?


aDeChemant

✓


bAsh

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cPlateau

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dMcClean

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View Answer DeChemant

Chemical method of strengthening porcelain involves_________________?


aExchange of aluminium and sodium ions

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bExchange of aluminium and potassium ions

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cExchange of sodium and potassium ions

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dNone of the above

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