Formula of hydroxyapatite crystal is____________?

Related Mcqs:

1. A crystal in metal substructure is_______________?

   A. Grain
   B. Nucleus
   C. Stroma
   D. None of the above

2. The average diameter of coronal dentinal tubules near the pulp is____________?

   A. 0.2-0.5 microns
   B. 2-3 microns
   C. 0.2-0.3 microns
   D. 7 microns

3. Which of the following is dental formula of a 9 years old child_____________?

   A. 6 EDC21/ 6EDC21
   B. 6EDCBA/ 6EDC21
   C. EDC21/EDC21
   D. 76EDC21/ 7EDC21

4. The most accepted theory of tooth eruption is____________?

   A. Hydrodynamic theory
   B. Clone theory
   C. Periodontal ligament traction theory
   D. Vascular theory

5. Order of development of tooth germ is____________?

   A. Bell-bud-cap
   B. Cap-bell-bud
   C. Bud-cap-bell
   D. Bell-cap-bud

6. Intermediate cementum is____________?

   A. Highly defined cellular zone near cemento – dentinal junction (CDJ)
   B. Highly defined fibrillar zone near CDJ
   C. Poorly defined zone near cemento-dentinal junction
   D. Both a and B

7. Cellular cementum is____________?

   A. First formed cementum
   B. Less calcified than acellular type
   C. More calcified than acellular type
   D. Less irregular

8. The most abundant principle fibre group in periodontal ligament is____________?

   A. Horizontal
   B. Transeptal
   C. Apical
   D. Oblique

9. The primary function of the dental pulp is____________?

   A. Nutritive
   B. Production of dentin
   C. Production of enamel
   D. Vascular supply to the teeth

10. Basal bone is____________?

    A. That part of the bone embracing apices of root of teeth
    B. Lower border of the mandible
    C. Ramus of the mandible
    D. That part of the bone containing teeth