oral histology MCQs – Page 13

Practise focused oral histology questions with marked answers for exam preparation and subject revision.

oral histology Mcqs

241. Interwining of the enamel rods at the cusp timps and the incisal edges of a tooth is called______________?
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A. Enamel spindles

B. Incremental lies of woven

C. Gnarled enamel

D. Incremental lines of retzius

242. Blood supply of ameloblast for most of its life cycle comes form_______________?
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A. Dental pulp

B. Reduced enamel organ

C. Dental Sac

D. Dental papilla

243. Periodontal ligament has predominantly_________?
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A. Elastic fibres

B. Type II collagen fibres

C. Type I collagen fibres

D. Oxytalan fibres

244. Fibres of periodontal ligament embedded in the bone are_____________?
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A. Rays fibres

B. Sharpeys fibres

C. Elastic fibres

D. Tomes fibres

245. Bone adjacent to periodontal ligament that contains a great number of sharpeys fibres is known as______________?
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A. Lamina dura

B. Lamina propria

C. Bundle bone

D. Lamina densa

246. Cells occurring in greatest number in pulp are______________?
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A. Fibroblasts

B. Osteoblasts

C. Cementoblasts

D. Ameloblasts

247. High levels of albumin is present in____________?
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A. Stellate reticulum

B. Stratum intermedium

C. Outer enamel epithelium

D. Inner enamel epithelium

248. Hunter Schreger band are____________?
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A. Dark and light bands of enamel seen in longitudinal ground section

B. Dark and light brands of dentin seen in longitudinal section

C. Dark and light bands of enamel seen in horizontal ground section

D. Dark and light bands of dentin seen in horizontal

249. If overgrowth of cementum does not improve the functional qualities of cementum, it is termed as_____________?
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A. Hypoplasia

B. Hypertrophy

C. Excementoses

D. Hyperplasia

250. Formula of hydroxyapatite crystal is____________?
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A. 3Ca (Po4)2 Ca(OH)2

B. Ca3 (Po4)2 CaCo3

C. None of the above

D. CaPo4 Ca(OH)2

251. Principal fibres of periodontal ligament are attached to_____________?
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A. Lamellar bone

B. Alveolar bone proper

C. Bundle bone

D. Cortical bone

252. Which of the following statement is correct?
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A. Enamel cannot form in absence of dentin

B. Enamel formation can occur in absence of dentin

C. The formation of enamel and dentin are independent of each other

D. None of the above

253. Matrix vesicles_______________?
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A. Contain collagen

B. Produce alkaline phosphatase

C. Inhibit mineralization

D. Are found in mantle dentin

254. Collagen molecule exhibits all of the following features except_____________?
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A. Mostly contains glycine residues

B. Intracellular in nature

C. Triple pleated sheath

D. Exhibit cross striations at 64 ?m

255. The cells that form secondary dentin are_______________?
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A. Cementoblasts

B. Odontoblasts

C. Osteoblasts

D. Fibroblasts

256. Cellular cementum and compact bone contain____________?
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A. Canaliculi and incremental lines

B. Sharpehys fibres and elastic fibres

C. Collagen fibres and blood vessels

D. Lacunae and elastic fibres

257. Chronic periapical inflammation is usually associated with____________?
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A. Hypertrophy of cementum

B. Ankylosis

C. Hyperplasia of cementum

D. Resorption of cementum

258. The diameter of the largest arterial vessels in the pulp range from_____________?
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A. 201-250 ?m

B. 151-200 ?m

C. 101-150 ?m

D. 50-100 ?m

259. The primary function of the dental pulp is____________?
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A. Nutritive

B. Production of dentin

C. Vascular supply to the teeth

D. Production of enamel

260. Weils zone of pulp is__________?
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A. Cell degenerated zone

B. Cell regenerated zone

C. cell free zone

D. Cell rich zone

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