Search
.Management Sciences
Category: Impression Materials
Impression compound base_____________?
A. Low thermal conductivity
B. Crystalline structure
C. Formation of cross linkage with heating
D. High fusion temperature
Rubber base impressions are poured immediately as they_______________?
A. Continue to polymerize
B. Become elastic
C. Show imbibition and syneresis
D. Show gelation
Dustless alginate is produced by______________?
A. Reducing the diatomaceous earth
B. Adding heavy metal salts
C. Coating with dihydric alcohol
D. Altering the matrix
Most flexible impression material______________?
A. Impression compound
B. Impression paste
C. Addition silicone
D. Alginate
Most ideally elastic among the following_______________?
A. Polyether
B. Addition silicone
C. Polysulphide
D. Condensation silicone
Masterial causing minimum tissue distortion is______________?
A. Polysulphide
B. Silicone
C. Impression plaster
D. Zinc oxide eugenol paster
All of the following statements about Type II silicon impression material are true EXCEPT_______________?
A. They evolve hydrogen when cast if they are not fully cured
B. They exhibit a very low setting shrinkage
C. They have a lower tear resistance than polysulphide rubbers
D. They set by condensation polymerisation
The term given to the phenomenon of moisture absorption by an alginate impression in________________?
A. Imbibition
B. Syneresis
C. Hysteresis
D. Gelation
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
Which one of the following increase the strength and reduce viscosity of agar hydrocolloid impression material_____________?
A. Borax
B. Water
C. Sulfates
D. Carbonates
Recent Comments