Dental Materials MCQs

Page No. 31

Two in one stage impression materials include______________?


aZinc Oxide eugenol impression paste

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bHydrocolloid impression material

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cElastomeric impression material

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dAll of the above

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Dustless alginate is produced by______________?


aReducing the diatomaceous earth

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bAdding heavy metal salts

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cCoating with dihydric alcohol

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dAltering the matrix

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Final product in alginate is________________?


aPotassium alginate

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bSodium alginate

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cTrisodium phosphate

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dCalcium alginate

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View Answer Calcium alginate

Which of the following best describes the working time of elastomeric impression material ?


aAfter the start of appearing elastic properties of impression material

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bJust after the start of appearing elastic properties of impression material

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cJust before the start of appearing elastic properties of impression material

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dLoss of luster of impression material

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Which one of the following impression materials is elastic, sets by a chemical reaction and is catalyzed by chloroplatinic acid_______________?


aPoly vinyl siloxane

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bCondensation silicone

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cPolysulphide

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dPolyether

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View Answer Poly vinyl siloxane

Most ideally elastic among the following_______________?


aPolysulphide

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bAddition silicone

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cCondensation silicone

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dPolyether

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View Answer Addition silicone

Most rigid elastomer is___________________?


aPolysulphide

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bAddition silicone

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cCondensation silicone

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dPolyether

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View Answer Polyether

Rough surface of elastomeric impression results from_______________?


aInadequate mixing

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bAir bubbles

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cToo rapid polymerization

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dIncomplete polymerization caused by premature removal from mouth

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The relative hardness of elastomere is determined using________________?


aRockwell tester

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bBarcol indenter

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cKnoop pyramid

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dShore durometer

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View Answer Shore durometer

What is the minimum thickness of the elastomeric impression material for an accurate impression_______________?


a2 mm

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b2- 4 mm

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cGreater than 3 mm

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dMaximum in the area of operation

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