Dental Materials MCQs

Page No. 32

Putty wash technique_________________?


aLight body and putty used at the same time

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bPutty used first and light body used second

✓


cLight body first and putty later

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dNone of the above

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Impression material that Do NOT harden by chemical reaction_______________?


aZinc oxide eugenol

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bImpression compound

✓


cAlginate

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dPlaster of Paris

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View Answer Impression compound

Hydrocolloid material, show all except______________?


aRecrytallisation

✓


bImbibition

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cHysteresis

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dSyneresis

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View Answer Recrytallisation

Polysulfide material is routinely not recommended because of_______________?


aUnpleasant odor and taste

✓


bLow accuracy

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cLeast permanent deformation

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dHighest curing shrinkage

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


a4%

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b6%

✓


c8%

✖


d10%

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View Answer 6%

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


aAir incorporated during mixing

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bImproper application of pressure during impression making

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cPresence of excessive saliva in impression area

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dDue to improper ratio of polymer and monomer

✓



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


a43.5°C

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b39°C

✓


c65°C

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d100°C

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View Answer 39°C

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


aAlginate

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bAgar

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cElastome

✓


dZnO paste

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View Answer Elastome

The water powder ratio of alginate is______________?


a100 ml of water to 60 gms of powder

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b40 ml of water to 40 gms of powder

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c40 ml of water to 15 gms of powder

✓


d15 ml of water to 40 gms of powder

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


aBorax

✓


bWater

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cSulfates

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dCarbonates

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View Answer Borax

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