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.Management Sciences
Category: Dental Materials
MEchanism of adhesion of GIC restoration with tooth surface is by mean of ______________?
A. Carboxyl group
B. Chelates with Metal Ions
C. C=C double bond
D. Polymer chains
The chief advantage of zinc phosphate cement is its___________?
A. Good compressive strength
B. Film thickness
C. Lack of irritation
D. Low solubility
To cure a heat cure resin, a proper heating cycle is necessary_____________?
A. To prevent the porosity
B. To prevent warpage
C. To prevent volume expansion
D. All of the above
Moisture contamination of amalgam can lead to_____________?
A. Marginal breakdown
B. Shrinkage
C. Delayed expansion
D. increased stresses
Compared with noble metals, base metals show_______________?
A. Increased hardness
B. Increased ductility
C. Better biocompatibility
D. Increased density
The pattern for the metallic framework of a removable partial denture is fabricated from________________?
A. Inlay wax type-II
B. Boxing wax
C. Modelling wax
D. Casting wax
All of the following can be used to slow down the setting of Zinc oxide eugenol impression paste EXCEPT_________________?
A. Adding a small amount of glycerine
B. Adding a small amount of water
C. Altering the amounts of the two pastes used
D. Cooling mixing slab
Which of the following is function of fluoride flux in soldering process ?
A. It prevents the formation of copper oxide
B. It prevents the formation of chromium oxide or dissolves chromic oxide layer
C. It prevents the flow of material in undesirable area
D. Increase the strength of solder
Which of the following refractory is used to counteract most of the expansion________________?
A. Quartz
B. Cristobalite
C. Tridymite
D. Corundum
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