oral histology MCQs – Page 16

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

oral histology Mcqs

301. Enamel spindles are formed by______________?
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A. Hypocalcified rods

B. Ameloblasts

C. Cracks

D. Odontoblasts

302. The attached apparatus of tooth is composed of______________?
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A. Cementum and periodontal ligament

B. Gingiva and cementum

C. Gingiva, cementum and alveolar bone

D. Peridontal ligament the cementum and the alveolar bone

303. Propriceptors are seen in all except______________?
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A. TMJ

B. Skeletal muscle

C. None of the above

D. Pulp

304. The relationship between the pulpal and periodontal tissue complex begins during dental development at_____________?
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A. Adolescent stage

B. Embryonic stage

C. None of the above

D. 5-10 years

305. All of the following is true about dentinal tubules except______________?
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A. Inner pulpal layer contains more dentinal tubules than outer dentin layer

B. The diameter of dentin tubules ranges from 5 to 7?m

C. The diameter of dentinal tubule is more at pulpal layer than outer layer

D. The bonding is more on the inner layer of dentin compared to outer surface

306. Cellular cementum is____________?
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A. Less irregular

B. Less calcified than acellular type

C. First formed cementum

D. More calcified than acellular type

307. Maximum amount of phosphate is seen in_______________?
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A. Dentin

B. Bone

C. Enamel

D. Gingiva

308. The size of apical foramen of maxillary teeth in adult is______________?
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A. 0.7 mm

B. 0.3 mm

C. 0.4 mm

D. 0.2 mm

309. The small ridges, perikymata, seen on facial surfaces of canines are the result of_____________?
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A. Hypoplacification

B. Hyperplasia

C. Interstitial development

D. Normal development

310. Intermediate cemental layer_____________?
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A. Does not exhibit features of either dentin of cementum

B. Represents area of entrapment of hertwigs sheath in dentin or cementum

C. Predominantly seen in apical tow thirds of roots of molars and premolars and is rare in incisors or deciduous teeth

D. All of the above are correct

311. If cementum is not formed______________?
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A. Exforliation of teeth occur

B. No change occurs

C. Delayed eruption

D. Ankylosis may occur

312. Butt joint in cementoenamel junctions seen is _________% of cases?
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A. 60%

B. 90%

C. 30%

D. 10%

313. Mirgration of odontoblasts into dentinal tubules occurs during ________________?
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A. Water irrigation

B. None of the above

C. Cavity preparation

D. Dehydration

314. Non acidic, nonionic protein which helps in enamel mineralization _______________?
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A. Enamelin

B. Amelogenin

C. Tuftelin

D. Sheathlin

315. Fluid flow, in or out of the dentinal tubules is proportional to the tuble diameter by______________?
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A. Square of the diameter

B. Third power of the diameter

C. Fourth power of the diameter

D. Sixth power of the diameter

316. Ionic exchange between enamel surface and environment______________?
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A. Does not take place once enamel surface and invironment

B. Stops after 2 years of eruption

C. Continues through out life

D. Continues till adult life

317. Neonatal lines are seen in_______________?
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A. Enamel of deciduous incisiors

B. Enamel of premolars

C. Enamel of permanent incisors

D. Dentin of all teeth, as if is formed first

318. The thinnest epithelium of oral cavity is found in the____________?
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A. Buccal gingiva

B. Sublingual mucosa (floor of mouth)

C. Lingual gingiva

D. Oral surface of lip

319. Which type of collagen fibers demonstrates Chicken wire configuration ?
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A. Type III

B. Type II

C. Type I

D. Type IV

320. Membrane coating granules may_____________?
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A. Appear as circular with an amorphous core in keratinized epithelium

B. Originate from golgi system

C. Packed with tonofilaments

D. Helps in adhesion of fully keratinized epithelial cells

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