Discolouration of silver alloy is due to_____________?

Related Mcqs:

1. Which of the following statements about high copper silver alloy compared to conventional alloy is not true ?

   A. It has increased tensile and compressive strength
   B. It has poor tarnish and corrosion resistance
   C. It’s edge strength is greater
   D. Mercury content in the final restoration is less

2. Tooth discolouration due to high bilirubin secretion is seen in the____________?

   A. Pink tooth of mummery
   B. Ochronosis
   C. Chlorodontia
   D. Leong teeth

3. Silver tatoo is due to_____________?

   A. deposition of Ag Amalgam in Mucosa
   B. deposition of Ag Amalgam in Bone
   C. deposition of Ag Amalgam in Dentin
   D. deposition of Ag Amalgam in Enamel

4. Which of the following silver amalgam alloy have the maximum strength________________?

   A. Lathe cut
   B. Spherical
   C. Admixed
   D. Single composition

5. Which phase provides maximum strength in hardened mercury/silver alloy ?

   A. Silver / Mercury phase
   B. Silver / Tin phase
   C. Tin / Mercury phase
   D. Zinc / Mercury phase

6. Over-trituration of silver alloy and mercury_______________?

   A. Reduces contraction
   B. Increases the strength of lathe cut alloy but reduces the strength of spherical alloy amalgam
   C. Decreases creep
   D. Gives al dull and crumbly amalgam

7. Which of the following statement is true regarding lathe cut low Copper silver alloy ?

   A. Requires least amount of mercury
   B. Achieves high compressive strength at 1 hr.
   C. Has tensile strength both at 15 minutes and 7 days is comparable to high copper, unicompositional alloys
   D. Has lower cree value

8. 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

9. Yellowish discolouration of oral mucous membrane, skin and sclera of eye is______________?

   A. Pernicious anemia
   B. Sickle cell anemia
   C. Chloromycin therapy
   D. Carotinemia

10. A flat, cricumscribed discolouration of skin or mucosa that may vary in size and shape is referred to as:____________?

    A. Epulits
    B. Macule
    C. Nodule
    D. papule