Dental Materials MCQs

Page No. 18

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


a51 to 54 degree F


b51 to 54 degree C


c70 to 75 degree C


d70 to 75 degree F


View Answer 51 to 54 degree C

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


aHigh fusion expansion


bHigh fusion temperature


cLinear coefficient of thermal expansion less than that of metal


dLinear coefficient of thermal expansion more than that of metal



Dispersion of crystalline phase to strengthen ceramics results in_________________?


aDispersed porcelain


bGlazed porcelain


caluminium porcelain


dAll of the above


View Answer aluminium porcelain

The preferred material for repair of fractured denture base is______________?


aChemically cure resin


bHigh cure resin


cLow cure resin


dVinyl resin


View Answer Chemically cure resin

Super abrasive is________________?


aSand


bSilicon arbide


cDiamond


dAluminum oxide


View Answer Diamond

The maximum shrinkage during firing proces in ceramic occurs in__________________?


aHigh Bisque stage


bLow Bisque stage


cMedium Bisque stage


dFusion stage


View Answer Medium Bisque stage

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


aCold stage bisque


bLow bisque


cMedium bisque


dHigh bisque


View Answer Cold stage bisque

Coefficient of thermal expansion of metal-ceramic alloys is________________?


aSame as porcelain


bMore than porcelain


cLess than porcelain


dMore than or equal to porcelain but not less



The main purpose of adding metallic oxides in ceramic is________________?


aColour matching


bTransparency


cOpacity


dNone of the above


View Answer Colour matching

Dental porcelains are crystalline materials of________________?


aRubber


bPlastic


cOrganic substances


dGlass


View Answer Glass

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