Which of the following is a characteristic of tetracycline stains ?

Related Mcqs:

1. 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

2. Tetracycline is contraindicated in_____________?

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

3. 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

4. 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

5. Tetracycline in children causes____________?

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

6. Tetracycline chelates with______________?

   A. Ca salts
   B. Mg salts
   C. All salts
   D. All of the above

7. Tetracycline when given to pregnant woman can cause_______________?

   A. Acute hepatic necrosis
   B. Discoloration/ staining of hard structures of foetus
   C. Increased intracranial pressure in infant
   D. All of the above

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

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

9. Tetracycline acts on______________?

   A. 30S ribosomes
   B. 50S ribosomes
   C. Cell membrane
   D. Inhibiting DNA gyrase

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

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