Green stains which occur frequently in children are due to_________________?

Related Mcqs:

1. Patient reports with discolored teeth bearing brown stains. The teeth glow fluorescent in UV light. The most likely diagnosis is____________?

   A. Porphyria
   B. Amelogenesis imperfecta
   C. Hutchinson’s teeth
   D. Tetracycline staining of teeth

2. Port wine stains are seen in______________?

   A. Nevus
   B. Haemangioma
   C. Melanoma
   D. All of the above

3. Tetracycline stains appear as______________?

   A. Yellow and brown stains in enamel and dentin
   B. Yellow and brown stains only in enamel
   C. Yellow and brown stains only in dentin
   D. Only yellow stain in enamel

4. In children the most frequently missing permanent teeth are________________?

   A. First premolars
   B. Second Premolars
   C. Max. lateral incisors
   D. Mandibular lateral incisors

5. Which of the following is a characteristic of tetracycline stains ?

   A. There is less deposition in dentine as compared to enamel
   B. Is always accompanied by hypolastic defects
   C. Stains are dark brown in color
   D. Stained teeth fluoresce light yellow under U.V light

6. Suck back porosity is due to_________________?

   A. Attached impurities on undersurface of casting
   B. Hot spot
   C. No rapid cooling
   D. Inadequate melting temperature

7. Opacity around colonies of Clostridium perfringens is due to_________________?

   A. Theta toxin
   B. Lecithinase
   C. Desmolase
   D. Cytokinin

8. Diffuse erythema (pinpoint petechiae) and white patches in smoker’s palate occur due to________________?

   A. Complete obstruction to minor salivary gland orifices
   B. Keratinization with partially occluded minor salivary glands
   C. Diffuse parakeratinization of the palate
   D. Excessive orthokeratinization of the palate

9. Gemination of teeth occur due to______________?

   A. Division of a single tooth bud after calcification
   B. Division of a single tooth bud before calcification
   C. Fusion of two teeth before calcification
   D. Fusion of two teeth after calcification

10. Ptosis may occur due to damage to_______________?

    A. Trochlear nerve
    B. Occulomotor
    C. Trigeminal nerve
    D. Superior oblique muscle