Dental Materials MCQs

Page No. 1

The term trituration means____________?


aLysing amalgam alloy

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bMixing of amalgam alloy and mercury

✓


cRemoval of excess of mercury

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dNone of the above

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The highest mercury concentration in amalgam filling is found_____________?


aAt the margin of the restoration

✓


bIn the centre of the restoration

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cIn the deepest part of the restoration

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dNone of the above

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The ADA specification No 1 for composition of amalgam alloy recommends______________?


a65% silver, 32% tin and 3% copper

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b49% silver, 32% tin and 19% cooper

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c65% silver, 29% tin and 5-6% copper

✓


dNone of the above

✖



Which of the following phases of dental amalgam has minimum strength____________?


aGamma 1

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bGamma 2

✓


cEpsilon 1

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dGamma 3

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View Answer Gamma 2

Compare to conventional amalgams, spherical amalgams_______________?


aRequire more mercury

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bRequire heavy compection forces

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cHave longer setting times

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dNone of the above

✓


View Answer None of the above

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


aIt has increased tensile and compressive strength

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bIt has poor tarnish and corrosion resistance

✓


cIt’s edge strength is greater

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dMercury content in the final restoration is less

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Increase in the residual mercury in silver amalgam filling can_____________?


aCause fracture of the filling

✓


bTarnish and corrosion

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cIncrease the strength

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dDecrease condensation pressure

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Chronic mercury toxicity results from_____________?


aIngestion while removing old amalgam

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bSkin contact

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cMercury vapour

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dAll of the above

✓


View Answer All of the above

In spherical alloys as compared to lathe cut____________?


aLess condensing force is required

✓


bMore condensing force is required

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cBoth require same condensing force

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dManipulation is easy

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Well premeasured capsules of amalgam can release mercury vapour during_______________?


aMulling

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bCarving

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cCondensation

✓


dTrituration

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View Answer Condensation

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