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.Management Sciences
Category: Dental Materials
Compare to conventional amalgams, spherical amalgams_______________?
A. Require more mercury
B. Require heavy compection forces
C. Have longer setting times
D. None of the above
Which one of the following is used as filler in composite resins ?
A. Quartz
B. Silicates
C. Zinc particles
D. Aluminium
Direct filling gold formed by electrolytic precipitation is called by all the terms EXCEPT______________?
A. Crystalline
B. Granular gold
C. Mat gold
D. Sponge gold
The solid solution of silver and mercury is called_______________?
A. y1
B. y2
C. B1
D. y
The setting expansion of gypsum products can be reduced by________________?
A. Increased spatulation
B. Adding potassium sulfate
C. Less water powder ratio
D. Allowing setting under water
Increase in the residual mercury in silver amalgam filling can_____________?
A. Cause fracture of the filling
B. Tarnish and corrosion
C. Increase the strength
D. Decrease condensation pressure
The advantage of ZOE impression paste_______________?
A. Has dimensional stability
B. Does not adhere to tissues
C. Is easy manipulation
D. Does not require special trays
The deoxidizing agent added to dental alloys is______________?
A. Palladium
B. Silver
C. Copper
D. Zinc
Advantage of minimum mercury technique or Eames technique is all Except________________?
A. High strength
B. Sets quickly
C. Needs no squeezing of excess mercury
D. Greater plasticity and adapts well to cavity walls
The % of free monomer in a heat – cured acrylic resin is_______________?
A. 3% to 5%
B. 8% to 10%
C. 0.2% to 0.5%
D. 0.6% to 0.8%
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