Dental Materials MCQs

Page No. 32

Putty wash technique_________________?


aLight body and putty used at the same time


bPutty used first and light body used second


cLight body first and putty later


dNone of the above



Impression material that Do NOT harden by chemical reaction_______________?


aZinc oxide eugenol


bImpression compound


cAlginate


dPlaster of Paris


View Answer Impression compound

Hydrocolloid material, show all except______________?


aRecrytallisation


bImbibition


cHysteresis


dSyneresis


View Answer Recrytallisation

Polysulfide material is routinely not recommended because of_______________?


aUnpleasant odor and taste


bLow accuracy


cLeast permanent deformation


dHighest curing shrinkage



Minimum flow of Type-I impression compound at mouth temperature is___________________?


a4%


b6%


c8%


d10%


View Answer 6%

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


aAir incorporated during mixing


bImproper application of pressure during impression making


cPresence of excessive saliva in impression area


dDue to improper ratio of polymer and monomer



Which of the following is correct glass transition temperature of Impression compound ?


a43.5°C


b39°C


c65°C


d100°C


View Answer 39°C

Best impression material to be used for securing impression after crown preparation_______________?


aAlginate


bAgar


cElastome


dZnO paste


View Answer Elastome

The water powder ratio of alginate is______________?


a100 ml of water to 60 gms of powder


b40 ml of water to 40 gms of powder


c40 ml of water to 15 gms of powder


d15 ml of water to 40 gms of powder



Which one of the following increase the strength and reduce viscosity of agar hydrocolloid impression material_____________?


aBorax


bWater


cSulfates


dCarbonates


View Answer Borax

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