medical MCQs – Page 141

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 Review each marked answer and report any item that may be outdated or unclear.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

2801. Age hardening is a process done at______________?
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A. Heating at 700C for 10 15 min and quenching in water

B. Heating at 700C for 1 hour and quenching in water

C. Heating above 700C for 30 min and quenching in water

D. Heating up to 200 450C for 15 30 min and quenching in water

2802. Which of the following is true?
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A. Cutting cone or resorption tunnel is the area of resorption seen in alveolar bone

B. CAMP or cyclic adenosine monophosphate levels are increased on pressure side of bone and this results in bone resorption

C. Immature born / embryonic bone seen during fracture healing contains less calcified material and greater number of large osteocytes

D. All of the above

2803. Amalgam restorations give the best clinical service when the residual mercury content is_______________?
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A. 38-42%

B. 48-52%

C. 58-62%

D. 68-72%

2804. Which phase provides maximum strength in hardened mercury/silver alloy ?
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A. Zinc / Mercury phase

B. Silver / Tin phase

C. Silver / Mercury phase

D. Tin / Mercury phase

2805. In a high copper amalgam the phase, which is eliminated is_______________?
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A. Gamma 2

B. No phase is eliminated

C. Gamma 1 and 2

D. Gamma 1

2806. The glands of Blandin and Nuhn are_____________?
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A. The glossopalatine glands

B. The anterior lingual glands located near the apex of tongue

C. The posterior lingual glands

D. The palatine glands

2807. Porcelain is best fired__________________?
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A. Under air compression

B. In open air

C. Under minimum pressure

D. When several layer are fired simultaneously

2808. Which is not present in porcelain________________?
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A. Feldspar

B. Calcium carbonate

C. Amorphous material

D. Silica

2809. Which of the following phases of dental amalgam has minimum strength____________?
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A. Gamma 2

B. Epsilon 1

C. Gamma 1

D. Gamma 3

2810. The opacity in ceramics is achieved by adding_______________?
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A. Copper oxide

B. Boric oxide

C. Silica

D. Titanium oxide

2811. The logical explanation for the unique anticariogenic property of most silicate cements is______________?
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A. That silicates show very little leakage at the margins of the restoration

B. Due to the high silica content

C. The reduction in enamel solubility due to fluoride uptake by enamel

D. That beryllium flux is used in silicates

2812. Serous demilunes are seen in______________?
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A. Gastric glands

B. Liver

C. Pancreas

D. Salivary glands

2813. Strength of zinc phosphate is effected by_______________?
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A. Consistency of mix

B. Alteration of mixing time

C. P:L ratio

D. Temp of glass slab

2814. The chief advantage of zinc phosphate cement is its___________?
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A. Good compressive strength

B. Film thickness

C. Lack of irritation

D. Low solubility

2815. What is the working time of amalgam?
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A. Seven to eight minutes

B. Three to four minutes

C. One to two minutes

D. Five to six minutes

2816. Advantage of zinc phosphate over GIC is______________?
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A. Diametral strength

B. High modulus of elasticity

C. High compressive strength

D. Tensile strength

2817. How soon after a moisture contamination does a zinc containing amalgam alloy start expanding________________?
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A. 3-5 days

B. 1-2 days

C. 24 hours

D. 7 days

2818. Dicor restoration is_______________?
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A. None of the above

B. Heat pressed ceramics

C. Castabel ceramic

D. Two coloured restorations

2819. Which of the following statements about high copper silver alloy compared to conventional alloy is not true ?
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A. Its edge strength is greater

B. Mercury content in the final restoration is less

C. It has increased tensile and compressive strength

D. It has poor tarnish and corrosion resistance

2820. Setting time of Amalgam is best controlled by _______________?
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A. Altering Hg-Alloy ratio

B. Trituration time

C. Lathe cut alloy

D. Using spherical particles

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