Dental Materials MCQs

Page No. 29

Alginates are made dust free by adding______________?


aGlycol


bGlyecrol


cGlutamic acid


dAlcohol


View Answer Glyecrol

The role of magnesium chloride in zinc oxide eugenol impression paste_________________?


aRetarder


bModifier


cAccelerator


dPlasticizer


View Answer Accelerator

To make the vinyl Polysiloxane hydrophilic the following is added_______________?


aMineral oil


bSurfactant


cWater


dPlasticizer


View Answer Surfactant

Dimensional stability of hydrocolloid impressions may be achieved by_________________?


aUsing less water powder ratio


bStoring the impression under water


cProlonged manipulation


dUsing humidor


View Answer Using humidor

Which of the following is correct regarding chemical setting of condensation silicone_______________?


aPolymerization occurs with repeated elimination of small molecules


bPolymerization occurs with elimination of single byproduct


cBy condensation of repeated molecules of monomers


dCondensation does not occur at all



Which of the following is used as surface hardener in Impression material ?


a2% Potassium sulfate


b0.2% Potassium sulfate


c2% Sodium sulfate


d4% Potassium sulfate


View Answer 2% Potassium sulfate

Which of the following best describes the working time of impression material ?


aAfter the start of appearing elastic properties of impression material


bJust after the start of appearing elastic properties of impression material


cThe time for start of mixing till just before the start of appearing elastic properties of impression material


dLoss of lusture of impression material



Which of the following is correct arrangement of impression material regarding linear contraction in ascending order ?


aAddition silicone < polyether < polysulfide < condensation silicone


bAddition silicone < polysulfide < Polyether < condensation silicone


ccondensation silicone < polyether < polysulfide < Addition silicone


dcondensation silicone < polysulfide < polyether < Addition silicone



Most flexible impression material______________?


aImpression compound


bImpression paste


cAddition silicone


dAlginate


View Answer Impression compound

A laminate impression technique utilizes_______________?


aSyringe agar and chilled tray alginate


bSyringe agar and tray agar


cSyringe agar and impression compound


dChilled alginate and impression compound



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