A. Thoroughness of condensation
B. Rapidity of firing
C. High firing temperature
D. All of the above
Related Mcqs:
- For porcelain fused to metal crown, the porcelain should have ______________?
A. High fusion expansion
B. High fusion temperature
C. Linear coefficient of thermal expansion less than that of metal
D. Linear coefficient of thermal expansion more than that of metal - Porosity in porcelain at condensation stage depends on_________________?
A. Shape and size of particle
B. Uniform distribution of particle size
C. Number of particles
D. None of the above - To prevent porosity in dental porcelain it should be backed________________?
A. Boric oxide
B. In vacuum
C. For long period
D. Under pressure - In processing methyl methacrylate, the resin may show porosity if the flask is placed too soon porosity most likely occur_____________?
A. Throughout the denture
B. Near the borders
C. In the thickest part
D. On the denture surface - Sub surface porosity can be decreased by_______________?
A. Decreasing the sprue length
B. Decreasing the sprue thickness
C. Increasing the melting temperature
D. Increasing the mould temperature - Porcelain denture teeth________________?
A. Have a higher coefficient of thermal expansion than acrylic teeth:
B. Have a lower abrasion resistance than enamel
C. Should be used where the inter dental clearance is small
D. Have a higher abrasion resistance than gold - Phenomenon in which porcelain appears different under varying light condition is______________?
A. Translucency
B. Refractive optics
C. Metamerism
D. Opacification - Quartz is Dental porcelain is______________?
A. Strengthener
B. Binder
C. Pigment
D. Crack minimzer - Stage recognized in the firing of dental porcelain given below. Which of state is not correct ?
A. Cold stage bisque
B. Low bisque
C. Medium bisque
D. High bisque - Porcelain is best fired__________________?
A. In open air
B. Under air compression
C. When several layer are fired simultaneously
D. Under minimum pressure
