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


bpolyether > Condensation silicone > Polysulphide > Addition silicone


cAddition silicone > polyether > Polysulphide > Condensation silicone


dAddition silicone> Condensation silicone > Polysulphide > polyether



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


aZinc Sulphate & Zinc chloride


bZinc chloride & Eugenol


cZinc Sulphate & Eugenol


dGlycerine



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


aEthyl alcohol


bGlycol


cAcetate


dpropanol


View Answer Ethyl alcohol

Which of the following impression material requires a hardener ?


aAgar


bAlginate


cElastomers


dImpression compound


View Answer Agar

Most mucostatic among the following_____________?


aImpression compound


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


cPolysulfide, hydrocolloids, silicones, polyether


dHydrocolloids, polyether, silicones, polysulfide



The impression materials with lowest viscosity is_____________?


aPlaster of Paris


bAgar-agar


cZinc oxide eugenol


dElastmers


View Answer Plaster of Paris

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


aImproper application of pressure during impression making


bAir incorporated during mixing


cToo rapid polymerization


dPresence of moisture in impression area



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


aAddition polysilicone


bCondensation polysilicone


cPolysulfide


dPolyether


View Answer Polysulfide

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


aInjecting technique


bLaminate technique


cImmersion technique


dTempering technique


View Answer Laminate technique

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