medical MCQs – Page 143

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

medical Mcqs

1. oral anatomy 2. microbiology 3. oral pathology and medicine 4. physiology 5. biochemistry 6. general anatomy 7. dental materials 8. pharmacology 9. pathology 10. oral histology

2841. Which of the following cements bonds to tooth structure, which has an anticariogenic effect, has a degree of translucency and does not irritate the pulp ?
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A. Silicate cement

B. Resin cement

C. Glass ionomer cement

D. Polycarboxylate cement

2842. Thickness of luting cement is_____________?
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A. 10-20?

B. 60-80?

C. 1-2?

D. 20-40?

2843. High strength amalgam is achieved by_____________?
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A. Minimum matrix and maximum alloy phase

B. Minimum alloy phase

C. Maximum matrix and minimum alloy phase

D. Maximum matrix phase

2844. Direct filling gold formed by electrolytic precipitation is called by all the terms EXCEPT______________?
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A. Crystalline

B. Sponge gold

C. Granular gold

D. Mat gold

2845. Discolouration of silver alloy is due to_____________?
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A. Tarnish

B. Wet corrosion

C. Dry corrosion

D. Tarnish and corrosion

2846. The percentage of copper in high copper alloy is______________?
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A. 20-30%

B. 10-12%

C. 0-6%

D. 13-30%

2847. Which of the following characterizes the silicate cement______________?
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A. It is highly cariogenic

B. It is pulpal irritant

C. It produces thinnest film surface

D. Chemically attaches to the tooth structure

2848. Increased amount of powder in zinc phosphate cement mixture will cause_______________?
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A. Decreased strength

B. Decreased solubility

C. Increased setting time

D. Decreased film thickness

2849. Which of the following constituents of amalgam alloy decreases expansion____________?
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A. Tin

B. Zinc

C. Copper

D. Silver

2850. The ADA specification No 1 for composition of amalgam alloy recommends______________?
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A. 49% silver, 32% tin and 19% cooper

B. 65% silver, 29% tin and 5-6% copper

C. 65% silver, 32% tin and 3% copper

D. None of the above

2851. The dual cure cements should not be used with light transmitting prostheses thicker than____________?
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A. mm

B. 2.5 mm

C. 1.5 mm

D. mm

2852. Pyroplastic flow of porcelain is due to___________________?
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A. High temperature during glazing

B. Improper condensation

C. High firing temperature

D. Low temperature during glazing

2853. Cause of expansion in zinc containing amalgam is_____________?
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A. Nascent oxygen

B. Water

C. Zinc and water

D. Hydrogen

2854. According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be________________?
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A. 80 Mpa

B. 510 Mpa

C. 260 Mpa

D. 140 Mpa

2855. When porcelain is basked against metal, it should possess a________________?
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A. high fusion expansion

B. high fusion temperature

C. Linear coefficient of thermal expansion greater than, but close to that of the metal

D. linear coefficient of thermal expansion less than but close to that of metal

2856. Fluoride rich materials include ?
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A. Silicate cement

B. Glass ionomer cement

C. Polycarboxylate cement

D. All of the above

2857. During amalgamation, trituration is done to_____________?
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A. Coat the alloy particle with mercury

B. Remove excess mercury from the amalgam

C. Dissolve the alloy in mercury

D. Dissolve Hg in alloy

2858. The material used in its pure form in dentistry is______________?
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A. Composite

B. Gold

C. Silver

D. Amalgam

2859. Which cement base has the highest modulus of elasticity ?
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A. Polymer reinforced ZOE cement

B. Glass inomer cement

C. Zinc phosphate

D. Zinc polycarboxylate

2860. Dental porcelains are crystalline materials of________________?
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A. Organic substances

B. Plastic

C. Glass

D. Rubber

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