Search
.Management Sciences
Category: Dental Materials
Powders of dental plaster and dental stone differ mainly in____________?
0
A. Solubility
B. Shelf life
C. Chemical formula
D. Particle porosity
Alginate impression material is________________?
A. Non-elastic impression material
B. Thermoplastic impression material
C. More mucostatic than ZOE
D. Less mucostatic than ZOE
Coefficient of thermal expansion of metal-ceramic alloys is________________?
A. Same as porcelain
B. More than porcelain
C. Less than porcelain
D. More than or equal to porcelain but not less
Stage recognized in the firing of dental porcelain given below. Which of state is not correct ?
A. Cold stage bisque
B. Low bisque
C. Medium bisque
D. High bisque
Casting shrinkage is compensated by_______________?
A. Thermal expansion
B. Hygroscopic expansion
C. Wax expansion
D. All of the above
The most important disadvantage of acrylic denture base is_______________?
A. porosity
B. Shrinkage
C. Tooth breakage
D. Water absorption
The maximum carbon content of steel used in dentistry is__________________?
A. 19%
B. 2%
C. 1.7%
D. 4%
The dual cure cements should not be used with light transmitting prostheses thicker than____________?
A. mm
B. 1.5 mm
C. mm
D. 2.5 mm
Most rigid elastomer is___________________?
A. Polyether
B. Polysulphide
C. Addition silicone
D. Condensation silicone
A highly polished surface on a metallic dental restoration aids considerably in the prevention of the____________?
A. Dimensional change
B. Thermal conductivity
C. Warpage
D. Tarnish and corrosion
Recent Comments