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.Management Sciences
Category: Direct Filling Gold
When Gold fused with porcelain is fired at very high temperature greenish discoloration of cervical margin is due to________________?
A. High firing temperature
B. Disintegration of opaque layer
C. Presence of copper
D. Formation of excess oxides
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 malleting force is directed______________?
A. Perpendicular to the walls
B. Parallel to long axis of crown
C. 45° to the wall
D. None of the above
Electralloy is an alloy of________________?
A. Gold and Platinum
B. Cobalt and Chromium
C. Gold and Calcium
D. Tin and chromium
White gold alloy predominantly is______________?
A. Gold added with palladium
B. Gold added with calcium
C. Gold with much of chromium
D. Gold with silver
The cohesive gold used as bulk filler is_____________?
A. Electra alloy
B. Mat gold
C. Spherical gold
D. Gold foll
Powdered gold is___________________?
A. Made by a combination of chemical precipitation and atomization
B. Made by electrolytic precipitation
C. Made by beating pure gold at high temperatures
D. Made by milling pure gold ingots
Pitting of direct filling old restoration usually results from_________________?
A. Using contaminated gold foil
B. Poor finished preparation
C. Improper stepping of condenser point
D. Using small condenser point
The material used in its pure form in dentistry is______________?
A. Composite
B. Silver
C. Gold
D. Amalgam
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