Tetracycline stains appear as______________?

Related Mcqs:

1. 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

2. Colour of teeth stained by tetracycline appear _________ under UV light?

   A. Red
   B. Green
   C. Yellow
   D. Brown

3. 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

4. Port wine stains are seen in______________?

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

5. Green stains which occur frequently in children are due to_________________?

   A. Enamel deficiency
   B. Dentin deficiency
   C. Material alba
   D. Chromogenic bacteria

6. The Sensitive period for tetracycline induced discolouration in the permanent maxillary mandibular incisors and canines is________________?

   A. 3 months postpartum to 7th year of life
   B. 4 months in utero to 3 months postpartum
   C. 5 months in utero to 9 months postpartum
   D. Birth to 7th year

7. Tetracycline is contraindicated in_____________?

   A. Children
   B. Pregnancy
   C. Renal failure
   D. All of the above

8. The bacterial resistance to tetracycline is due to___________?

   A. Alteration of drug binding sites
   B. Alteration of dehydrofolate reductase
   C. Inactivation of drug by enzymes
   D. Decreased uptake of drug by bacteria

9. Tetracycline is more preferred in periodontics because______________?

   A. It is broad spectrum antibiotic
   B. It has anticollagenolytic effect
   C. All of the above
   D. None of the above

10. Tetracycline in children causes____________?

    A. Calcification
    B. Missing teeth
    C. Discolored teeth
    D. Peg teeth