Dental Materials MCQs

Page No. 11

Which cement base has the highest modulus of elasticity ?


aPolymer reinforced ZOE cement

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bZinc phosphate

✓


cZinc polycarboxylate

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dGlass inomer cement

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View Answer Zinc phosphate

Ethoxy benzoic acid increases the strength and solubility of the cement______________?


aZinc oxide eugenol

✓


bZinc Phosphate cement

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cPolycarboxylate cement

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dSilicate cement

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View Answer Zinc oxide eugenol

In non-eugenol pastes the constituents are mixed in______________?


aPhosphoric acid

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bEthyl alcohol

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cBenzoic acid

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dNone of the above

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View Answer Benzoic acid

MEchanism of adhesion of GIC restoration with tooth surface is by mean of ______________?


aCarboxyl group

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bChelates with Metal Ions

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cC=C double bond

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dPolymer chains

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View Answer Carboxyl group

The setting time of ZnPO4 cement can be retarded by_____________?


amixing more powder to the liquid

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bmixing powder to liquid, checked by water

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cslower addition of powder to liquid

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dfaster addition of powder to liquid

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Mode of failure during dislodgement of prosthesis cemented with zinc poly carboxylate cement is usually seen at the_____________?


aCement tooth interface

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bCement prosthesis interface

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cCleavage through the cement layer

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dFracture of tooth or prosthesis

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Which one of the following restorative materials is having coefficient of thermal expansion close to that of tooth enamel and dentin ?


aMicrofilled composite resins

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bSilver amalgam

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cPure gold

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dType II Glass ionomer cement

✓



Which one of the following dental cements does not contain water as part of the composition of the liquid component ?


aZinc phosphate cement

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bZinc oxide equgenol cement

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cZinc silicophosphate cement

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dZinc polycarboxylate cement

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Cavity varnishes have_____________?


aAverage bonding to tooth

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bLow bonding to tooth

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cExcellent bonding to tooth

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dNo bonding to tooth

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View Answer No bonding to tooth

Advantage of zinc phosphate over GIC is______________?


aHigh compressive strength

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bTensile strength

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cHigh modulus of elasticity

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dDiametral strength

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