Mercury intoxication in dental office mainly results from____________?

Related Mcqs:

1. Powders of dental plaster and dental stone differ mainly in____________?

   A. Solubility
   B. Shelf life
   C. Chemical formula
   D. Particle porosity

2. Bismuth intoxication is manifested as______________?

   A. pigmentation is areas of inflammation
   B. Burtonian line
   C. Gingiva
   D. Blackish line in the mucosa

3. High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________?

   A. Have less marginal breakdown
   B. Are workable at lower Hg-alloy ratio
   C. Have a higher ratio of tensile to compressive strength
   D. Have less resistance to tarnish and corrosion

4. The main difference between dental stone and dental plaster is______________?

   A. Chemical composition
   B. Self life
   C. Sharpe and size of particles
   D. Solubility in water

5. The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?

   A. 19
   B. 20
   C. 21
   D. 26

6. Detergents used to disinfect dental instruments in the office kill bacteria by interfering with functional of the cell______________?

   A. wall
   B. nucleus
   C. membrane
   D. Capsule

7. The Knoop Hardness Number of Microfilled composite Restorative material ranges from____________?

   A. 50 – 60 KHN
   B. 25 – 35 KHN
   C. 15 – 20 KHN
   D. 40 – 48 KHN

8. R-RNA is mainly produced mainly in___________?

   A. Nucleus
   B. Nucleolus
   C. Ribosome
   D. Endoplasmic reticulum

9. Epithelial attachment is derived from____________?

   A. Reduced enamel epithelium
   B. Dental papilla
   C. Inner enamel epithelium
   D. Dental sac

10. Accessory canals result from____________?

    A. Defects in cementogenesis
    B. Dividing epithelial bridges
    C. Break in Hertwig’s root sheath
    D. Adherent epithelial rests