medical MCQs – Page 499

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 Review each marked answer and report any item that may be outdated or unclear.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

9961. Dystrophic calcifiaction is seen most commonly in which of the following oral tissues__________?
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A. Periodontal ligament

B. Pulp

C. Enamel

D. Dentin

9962. The plexus of Rashkov is present in which of the following zones in pulp ?
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A. Cell free zone

B. Pulp core

C. Cell rich zone

D. Odontoblastic zone

9963. Periodontal ligament is made up of____________?
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A. Type I collagen

B. Type I and Type IV collagen

C. Type I and Type III collagen

D. Type I and Type II collagen

9964. Age changes in periodeontal ligament include which of the following ?
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A. Decreased in number of cementicles

B. Increased thickness

C. Increased vascularity

D. Increased fibroplasia

9965. Development of supporting tissues of the tooth is initiated by____________?
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A. Cells of odontogenic layer

B. Cells of dental follicle

C. Cells of the gingiva

D. Cementoblasts

9966. Excess deposition of calcium in the dentinal tubules is referred to as______________?
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A. Interglobular dentin

B. Mantal dentin

C. Sclerotic dentin

D. Intertubular dentin

9967. The microhardness of dentin is about____________?
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A. 1/4 that of enamel

B. 1/7 that of enamel

C. 1/2 that of enamel

D. 1/5 that of enamel

9968. Dark bonds that are present in enamel rods at intervals of 4 ?ms are______________?
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A. Hunter-Schregar bands

B. Striae of Retzius

C. Neonantal bands

D. Cross striations

9969. Which of the following tissues have no reparative capacity______________?
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A. Dentin

B. Cementum

C. Periodontal ligament

D. Enamel

9970. Acellular cementum is typically found in_____________?
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A. Coronal half of root

B. Entire root

C. Apex of root

D. Apical half of root

9971. If a childs teeth do not form, this would primarily effect the growth of the_____________?
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A. Mandible

B. Alveolar bone

C. Whole face

D. Basal bone

9972. Inorganic content of enamel is about______________?
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A. 96%

B. 35%

C. 4%

D. 50%

9973. Physically and chemically, the dentin is closely related to______________?
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A. Enamel

B. None of the above

C. Acellular cementum

D. Bone

9974. Pain originate in the pulp due to_________?
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A. Krause bulb at the center of the pulp

B. Meisseners corpuscles at cell rich zone

C. free nerve ending at sub odontoblastic layer

D. free nerve ending in cell rich zone

9975. The rest of malassez in the periodontal ligament are derived from_____________?
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A. Lamina propria

B. Vestibular lamina

C. Dental pulp

D. Odontogenic epithelium

9976. Which of the following groups of fibres are not attached to alveolar bone ?
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A. Transseptal

B. Apical

C. Oblique

D. Horizontal

9977. Moth eaten appearance of of enamel is seen in____________?
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A. Odontodysplasia

B. Amelogenisis stage

C. Mottled enamel

D. Desmolytic stage

9978. narled enamel is seen in_____________?
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A. Cusp tips of tooth

B. Proximal surface of tooth

C. All of the above

D. Cervical region of tooth

9979. The periodontal ligament_____________?
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A. Contains epithelial cells

B. Has a slow rate of turn over

C. Comprises primarily of type II collagen

D. Derives its blood supply primarily from the branches of vessels entering the pulp

9980. Dentin formed through out the life is______________?
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A. Sclerotic dentin

B. All of the above

C. Secondary dentin

D. Reparative dentin

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