By product of condensation reaction between silicone base and alkyl silicate in presence of tin octate_______________?

Related Mcqs:

1. The base paste of the condensation poly sillicone has a low molecular weight dimethyl siloxane with a terminal-group_______________?

   A. Marcaptan group
   B. Hydroxyl group
   C. Silane group
   D. Virryl group

2. The temperature (in °F) of the mixing slab for silicate cements should be_____________?

   A. 55 – 65
   B. 65 – 75
   C. 75 – 85
   D. 85 – 95

3. The logical explanation for the unique anticariogenic property of most silicate cements is______________?

   A. The reduction in enamel solubility due to fluoride uptake by enamel
   B. That beryllium flux is used in silicates
   C. That silicates show very little leakage at the margins of the restoration
   D. Due to the high silica content

4. Silicate cement is indicated in________________?

   A. Mouth breathers
   B. Patients with high caries index
   C. In the restoration of posterior tooth
   D. None of the above

5. Which of the following characterizes the silicate cement______________?

   A. It is pulpal irritant
   B. It is highly cariogenic
   C. Chemically attaches to the tooth structure
   D. It produces thinnest film surface

6. The average life of silicate cement restoration is______________?

   A. 2 years
   B. 4 years
   C. 6 years
   D. 8 years

7. The principal constituent of set silicate cement matrix is_______________?

   A. Hydrated Aluminium phosphate
   B. Hydrated Aluminium Phosphate with calcium fluoride
   C. Hydrate Aluminosilicate gel
   D. Hydrated Aluminium phosphate crystal, CAF2 alluminosiliate gel

8. One of the claims for the superiority composite resin restoration over silicate cement restorations is that the resin restorations_____________?

   A. Prevent galvanic action
   B. Are practically insoluble in oral fluids
   C. Adapt to the walls of the cavity better
   D. Have a higher coefficient of thermal expansion

9. Percentage of tin in low copper alloy is______________?

   A. 30-35%
   B. 26-28%
   C. 13-32%
   D. 22-30%

10. 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