Dental Materials MCQs

Page No. 30

Dimensional stability of elastomeric impression material can be given in descending order as_____________?


aPolysulphide > polyether > Condensation silicone > Addition silicone

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bpolyether > Condensation silicone > Polysulphide > Addition silicone

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cAddition silicone > polyether > Polysulphide > Condensation silicone

✓


dAddition silicone> Condensation silicone > Polysulphide > polyether

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Which of the following component acts as an accelerator in ZOE impression paste ?


aZinc Sulphate & Zinc chloride

✓


bZinc chloride & Eugenol

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cZinc Sulphate & Eugenol

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dGlycerine

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By product of condensation reaction between silicone base and alkyl silicate in presence of tin octate_______________?


aEthyl alcohol

✓


bGlycol

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cAcetate

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dpropanol

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View Answer Ethyl alcohol

Which of the following impression material requires a hardener ?


aAgar

✓


bAlginate

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cElastomers

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dImpression compound

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View Answer Agar

Most mucostatic among the following_____________?


aImpression compound

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bAlginate

✖


cZOE paste

✓


dElastomer

✖


View Answer ZOE paste

The ranking of tear strength from the lowest to highest of all impression materials generally is as follows_______________?


aHydrocolloids, silicones, polyether, polysulfide

✓


bSilicones, hydrocolloids, polyether, polysulfide

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cPolysulfide, hydrocolloids, silicones, polyether

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dHydrocolloids, polyether, silicones, polysulfide

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The impression materials with lowest viscosity is_____________?


aPlaster of Paris

✓


bAgar-agar

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cZinc oxide eugenol

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dElastmers

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View Answer Plaster of Paris

Rough and irregular surface produced on the impression is because of ?


aImproper application of pressure during impression making

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bAir incorporated during mixing

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cToo rapid polymerization

✓


dPresence of moisture in impression area

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Which of the following impression materials is easy to pour and difficult to remove the stone cast from the impression ?


aAddition polysilicone

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bCondensation polysilicone

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cPolysulfide

✓


dPolyether

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View Answer Polysulfide

A technique of combining reversible and irreversible hydrocolloid that could bond to irreversible hydrocolloid is known as________________?


aInjecting technique

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bLaminate technique

✓


cImmersion technique

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dTempering technique

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View Answer Laminate technique

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