A. Alumina
B. Silica
C. Kaolin
D. Boric oxide
✅ The correct answer is option D. Boric oxide.
Dental Materials
Porcelain is best fired__________________?
A. In open air
B. Under air compression
C. When several layer are fired simultaneously
D. Under minimum pressure
✅ The correct answer is option B. Under air compression.
When selection the colour of cement to use for cementing a porcelain jacket crown, the powder being tested is best mixed with______________?
A. Glycerin-water solution
B. Cement liquid
C. Alcohol
D. Only water
✅ The correct answer is option A. Glycerin-water solution.
Dicor restoration is_______________?
A. Two coloured restorations
B. Heat pressed ceramics
C. Castabel ceramic
D. None of the above
✅ The correct answer is option C. Castabel ceramic.
Setting time of Amalgam is best controlled by _______________?
A. Using spherical particles
B. Lathe cut alloy
C. Altering Hg-Alloy ratio
D. Trituration time
✅ The correct answer is option D. Trituration time.
Gallium and indium added to Amalgam replace______________?
A. Silver
B. Tin
C. Mercury
D. Zinc
✅ The correct answer is option C. Mercury.
Which glass ionomer cement develops early resistance to water intake on setting ?
A. Reinforced auto care glass ionomer cement
B. Compomer
C. Resin modified glass ionomer cement
D. Ceramic reinforced glass ionomer cement
✅ The correct answer is option C. Resin modified glass ionomer cement.
Once triturated, the Dental amalgam should be condensed with in_____________?
A. 5 minutes
B. 6 minutes
C. 3 minutes
D. 15 minutes
✅ The correct answer is option C. 3 minutes.
Which is not present in porcelain________________?
A. Silica
B. Feldspar
C. Calcium carbonate
D. Amorphous material
✅ The correct answer is option D. Amorphous material.
What is the working time of amalgam?
A. One to two minutes
B. Three to four minutes
C. Five to six minutes
D. Seven to eight minutes
✅ The correct answer is option B. Three to four minutes.