A. Highly polished porcelain
B. Highly polished acrylic
C. Highly glazed porcelain
D. Highly polished metal
Related Mcqs:
- The anatomic crown is shorter than the clinical crown of a tooth in which of the following instances___________________?
A. Impaction
B. Gingivitis
C. Occlusal wear
D. Gingival recession - Large open wounds that are characterized by tissue loss and repaired by formation of granulation tissue in the floor of the wound is characteristic of______________?
A. Secondary healing
B. Primary healing
C. Cicatrisation
D. Regeneration - Best impression material to be used for securing impression after crown preparation_______________?
A. Alginate
B. Agar
C. Elastome
D. Zno paste - Porcelain binds to metal in PFM crown by_________________?
A. Metallic bind
B. Transparency
C. Chemical bond
D. B and C - 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 - Alginate impression material is similar to Agar-agar impression material in the following respect________________?
A. Gelation increase in both on increase in temperature
B. Mixing time is increased to reduce the setting time
C. Deformation during removal of impression occurs due to distortion of gel fibers
D. Both can be re-used for fresh impressions - 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 - Masterial causing minimum tissue distortion is______________?
A. Polysulphide
B. Silicone
C. Impression plaster
D. Zinc oxide eugenol paster - When making a polysulphide impression for a caste crown, custom trays are usually preferred over stock trays for all of the following reasons except_______________?
A. Custom trays facilitate uniform contraction of impression material
B. Custom trays require less impression material
C. Stock trays may be short in the flange area
D. Impressions made n the custom trays are easier to remove from the mouth - In a metal ceramic crown for a FPD the function of tin, indium which are readily oxidized minor constituents is to________________?
A. Improve bonding
B. Decrease porosity
C. They react with the porcelain opaque layer, which masks the metal
D. Improves the thermal expansion between the metal and porcelain
