Dental Materials MCQs

Page No. 60

To cure a heat cure resin, a proper heating cycle is necessary_____________?


aTo prevent the porosity


bTo prevent warpage


cTo prevent volume expansion


dAll of the above



One of the claims for the superiority composite resin restoration over silicate cement restorations is that the resin restorations_____________?


aPrevent galvanic action


bAre practically insoluble in oral fluids


cAdapt to the walls of the cavity better


dHave a higher coefficient of thermal expansion



The latest method of curing denture base resins______________?


aHeat


bVisible light


cChemicals


dLasers


View Answer Visible light

Co-efficient of thermal expansion is highest for_____________?


aAmalgam


bSilicate cement


cGold alloy


dAcrylic resin


View Answer Acrylic resin

A material which is a mixture of two different materials and its properties are_____________?


aComposite


bComplex material


cCombined


dCompound


View Answer Composite

The particle size in microfilled composites is_____________?


a0.05 to 0.04mm


b0.5 to 1 microns


c0.01 to 0.1 microns


d0.3 to 0.4 microns


View Answer 0.01 to 0.1 microns

The imperfection seen on the lingual flange of a lower denture caused by rapid heating during a curing cycle is called_____________?


aLocalised Shrinkage porosity


bGas inclusion porosity


cMicro porosity


dSurface porosity


View Answer Micro porosity

Porosity of denture base is due to_______________?


aPacking at dough stage


bCuring at 160°F for 9 hrs


cInadequate pressure


dAll of the above


View Answer All of the above

Benzoin methyl ether in a polymer indicates that they may be cured in the presence of________________?


aUV light


bVisible light


cInfrared light


dDiketone


View Answer UV light

Which of the following may result if an excessive amount of monomer is incorporated into an acrylic resin mixture ?


aExcessive expansion


bExcessive brittleness


cExcessive shrinkage


dLow impact strength


View Answer Excessive shrinkage

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