Dental Materials MCQs

Page No. 18

The ideal temperature of water bath for softening fluid wax is about________________?


a51 to 54 degree F

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b51 to 54 degree C

✓


c70 to 75 degree C

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d70 to 75 degree F

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View Answer 51 to 54 degree C

For porcelain fused to metal crown, the porcelain should have ______________?


aHigh fusion expansion

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bHigh fusion temperature

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cLinear coefficient of thermal expansion less than that of metal

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dLinear coefficient of thermal expansion more than that of metal

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Dispersion of crystalline phase to strengthen ceramics results in_________________?


aDispersed porcelain

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bGlazed porcelain

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caluminium porcelain

✓


dAll of the above

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View Answer aluminium porcelain

The preferred material for repair of fractured denture base is______________?


aChemically cure resin

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bHigh cure resin

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cLow cure resin

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dVinyl resin

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View Answer Chemically cure resin

Super abrasive is________________?


aSand

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bSilicon arbide

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cDiamond

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dAluminum oxide

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View Answer Diamond

The maximum shrinkage during firing proces in ceramic occurs in__________________?


aHigh Bisque stage

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bLow Bisque stage

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cMedium Bisque stage

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dFusion stage

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View Answer Medium Bisque stage

Stage recognized in the firing of dental porcelain given below. Which of state is not correct ?


aCold stage bisque

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bLow bisque

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cMedium bisque

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dHigh bisque

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View Answer Cold stage bisque

Coefficient of thermal expansion of metal-ceramic alloys is________________?


aSame as porcelain

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bMore than porcelain

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cLess than porcelain

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dMore than or equal to porcelain but not less

✓



The main purpose of adding metallic oxides in ceramic is________________?


aColour matching

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bTransparency

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cOpacity

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dNone of the above

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View Answer Colour matching

Dental porcelains are crystalline materials of________________?


aRubber

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bPlastic

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cOrganic substances

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dGlass

✓


View Answer Glass

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