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.Management Sciences
Category: Dental Ceramics & Miscellaneous
Which of the following bur is used in the preparation of cavity restored with porcelain fused to metal ?
A. Carbide bur
B. Diamond bur
C. Stainless steel bur
D. Diamond but for porcelain and carbide bur for metal
Ceramics fired to metals are processed by_______________?
A. Heat pressing
B. Machining
C. Sintering
D. Slip casting
Chemical method of strengthening porcelain involves_________________?
A. Exchange of aluminium and sodium ions
B. Exchange of aluminium and potassium ions
C. Exchange of sodium and potassium ions
D. None of the above
Condensation shrinkage of porcelain during firing depends on__________________?
A. Rate of arriving at firing temperature
B. Uniformity of particle size
C. Shape and size of particle
D. Type of investment used
The preferred material for repair of fractured denture base is______________?
A. Chemically cure resin
B. Heat curve resin
C. Light cure resin
D. Vinyl resin
To prevent porosity in dental porcelain it should be backed________________?
A. Boric oxide
B. In vacuum
C. For long period
D. Under pressure
Phenomenon in which porcelain appears different under varying light condition is______________?
A. Translucency
B. Refractive optics
C. Metamerism
D. Opacification
In method of firing: A shorter firing period at a higher temperature is considered better_______________?
A. A large time period at a lower temperature is preferred
B. A long firing period at a very high temperature is preferred
C. A short firing period at a very low temperature is preferred
D. none of these
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