Medical MCQs

5099 MCQs  (Page 80 of 510)

Rough and irregular surface produced on the impression is because of ?
A. Improper application of pressure during impression making
B. Air incorporated during mixing
C. Too rapid polymerization
D. Presence of mositure in impression area
Two in one stage impression materials include______________?
A. Zinc oxide eugenol impression paste
B. Hydrocolloid impression material
C. Elastomeric impression material
D. All of the above
Dustless alginate is produced by______________?
A. Reducing the diatomaceous earth
B. Adding heavy metal salts
C. Coating with dihydric alcohol
D. Altering the matrix
Final product in alginate is________________?
A. Sodium alginate
B. Potassium alginate
C. Trisodium phosphate
D. Calcium alginate
Which of the following is not true about elastomeric impression ?
A. Single mix material have higher viscosity
B. Shear thinning is related to viscosity of non phase impression material
C. Improper mixing of material can cause permanent deformation of impression
D. Putty – wash technique of impression reduces dimensional change of setting