Dental Materials MCQs

Page No. 26

Impression plaster is_____________?


aLess compressive than alginate


bMore compressive than alginate


cAs compressive as alginate


dMore compressive than hydrocolloids



Setting time of ZOE is best controlled by______________?


aAdding a drop of eugenol


bAdding a drop of water


cCooling the glass slab


dAltering ratio of two pastes



Sol – gel transformation is seen in________________?


aImpression plaster


bHydrocolloids


cElastomer


dImpression compound


View Answer Hydrocolloids

The basic constituent of reversible hydrocolloid impression material is________________?


aAgar


bAlginic acid


cGelatin


dAlginate


View Answer Agar

Before pouring an elastic impression it is washed with slurry of water and stone to______________?


aIncrease gel strength


bPrevent syneresis


cPrevent distortion


dWash off saliva on impression



Which material is the most difficult to remove from the patients mouth ?


aMetallic oxide paste


bSilicone impression material


cReversible hydrocolloid


dImpression plaster


View Answer Metallic oxide paste

Heavy and light body impression materials are use with______________?


aMercaptan


bSilicone


cReversible hydrocolloid


dBoth A and B


View Answer Both A and B

Impression compound has which of the following characteristic property ?


aLow thermal conductivity


bHigh flow property


cDegradation is presence of moisture


dRemain distortion free up to 72 hrs. pouring can be safely delayed



Agar syringe material can be used with/as______________?


aAgar


bAlginate impression material


cBoth A and B


dPrimary impression


View Answer Both A and B

Trisodium phosphate added to alginate contributes towards_______________?


aincreasing the working time of alginate impression material


bActs as an accelerator


cInitiating the setting reaction


dProvides gel strength



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