A. Transformation toughening
B. Dispersion of crystalline phase
C. Inducing residual compressive strength
D. All of the above
A. Boric oxide
B. In vacuum
C. For long period
D. Under pressure
To prevent porosity in dental porcelain it should be backed________________? Read More »
Dental Ceramics & Miscellaneous, Dental Materials, Medical Mcqs A. High temperature during glazing
B. Low temperature during glazing
C. Improper condensation
D. High firing temperature
Pyroplastic flow of porcelain is due to___________________? Read More »
Dental Ceramics & Miscellaneous, Dental Materials, Medical Mcqs A. Rate of arriving at firing temperature
B. Uniformity of particle size
C. Shape and size of particle
D. Type of investment used
Condensation shrinkage of porcelain during firing depends on__________________? Read More »
Dental Ceramics & Miscellaneous, Dental Materials, Medical Mcqs A. In open air
B. Under air compression
C. When several layer are fired simultaneously
D. Under minimum pressure
Porcelain is best fired__________________? Read More »
Dental Ceramics & Miscellaneous, Dental Materials, Medical Mcqs A. Thoroughness of condensation
B. Rapidity of firing
C. High firing temperature
D. All of the above
Porosity in porcelain can be prevented by_______________? Read More »
Dental Ceramics & Miscellaneous, Dental Materials, Medical Mcqs A. Feldspar
B. Kaolin
C. Quartz
D. Clay
Which of the following is the main constituent of porcelain__________________? Read More »
Dental Ceramics & Miscellaneous, Dental Materials, Medical Mcqs A. Highly polished porcelain
B. Highly polished acrylic
C. Highly glazed porcelain
D. Highly polished metal
The best tissue tolerated material for crown and bridge_______________? Read More »
Dental Ceramics & Miscellaneous, Dental Materials, Medical Mcqs A. Rubber
B. Plastic
C. Organic substances
D. Glass
Dental porcelains are crystalline materials of________________? Read More »
Dental Ceramics & Miscellaneous, Dental Materials, Medical Mcqs A. Colour matching
B. Transparency
C. Opacity
D. None of the above
The main purpose of adding metallic oxides in ceramic is________________? Read More »
Dental Ceramics & Miscellaneous, Dental Materials, Medical Mcqs