When porcelain is basked against metal, it should possess a________________?

Related Mcqs:

1. 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

2. In porcelain metal elements are embedded in the matrix of________________?

   A. Rubber matrix
   B. Glass
   C. Plastic
   D. Resin matrix

3. Porcelain binds to metal in PFM crown by_________________?

   A. Metallic bind
   B. Transparency
   C. Chemical bond
   D. B and C

4. 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

5. The castability of chromium-cobait base metal alloys when compared to gold based noble metal alloys is_______________?

   A. More
   B. Less
   C. Equal
   D. Depends on the alloy type

6. Linear coefficient of thermal expansion of metal used for metal caramic restoration range from________________?

   A. 11.5-12.5×10-6/°C
   B. 10.5-11.5×10-6/°C
   C. 13.5-14.5×10-6/°C
   D. 16.5-17.5×10-6/°C

7. 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

8. Quartz is Dental porcelain is______________?

   A. Strengthener
   B. Binder
   C. Pigment
   D. Crack minimzer

9. Porcelain is best fired__________________?

   A. In open air
   B. Under air compression
   C. When several layer are fired simultaneously
   D. Under minimum pressure

10. 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