oral histology MCQs – Page 10

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

oral histology Mcqs

181. Cementum_____________?
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A. Does not contain collagen fibres

B. Often overlaps the enamel

C. Is derived from the sheath of hertwig

D. Is acellular in the apical third of the tooth

182. Disturbance during the morphodifferentition stage of tooth development will result in______________?
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A. Change in number of teeth

B. Ameloblastoma

C. Change in form and shape of the teeth

D. Hypoplasia

183. Incremental lines of Retzius appear_____________?
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A. As lines in the enamel running at right angles to the enamel surface

B. As lines in the dentin running at right angles to the dentino-enamel junction

C. In dentin and follow the appositional pattern

D. In enamel and follow the apposition pattern

184. Which of the following statement is true______________?
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A. The apical foramen is surrounded by cementum

B. Cementum is thinnest at CEJ (20-50?m)

C. Cementum is thickest towards the apex (150-200?m)

D. All of the above

185. Blunt cell processes seen on the developing ameloblasts are celled as________________?
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A. Tomes fibres

B. Tomes layer

C. Odontoblastic processes

D. Tomes processes

186. 1st formed dental tissue______________?
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A. Enamel

B. Bone

C. Dentin

D. Cementum

187. Inorganic content of cementum is______________?
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A. 60 to 65%

B. 45 to 50%

C. 55 to 60%

D. 50 to 55%

188. The 2nd most prominent cells in pulp are______________?
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A. defense cells

B. Odontoblasts

C. Fibroblasts

D. Histocytes or resting wandering cell

189. The primary response of the pulp to tissue destruction is_______________?
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A. Inflammation

B. Necrosis

C. Calcific degeneration

D. Ulceration

190. Morphological stages of tooth development are explained based on_____________?
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A. Function of enamel organ

B. Shape of enamel organ

C. Shape of dental papilla

D. Shape of tooth germ

191. Incremental lines of retzius are seen in______________?
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A. Dentin

B. Enamel

C. Pulp

D. Cementum

192. Maximum fluoride content is seen in_____________?
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A. Enamel

B. Dentin

C. Dental cementum

D. Dental pulp

193. Ratio of diameter of enamel rods in the DEJ to the enamel surface is______________?
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A. 2:01

B. 1:04

C. 1:02

D. 1:1

194. Hertwigs epithelial root sheath is made up of_______________?
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A. Hyaline layer of Hopewell-smill

B. Stratum intermedium

C. Stellate reticulum

D. Outer and inner enamel epithelium

195. True about osteoclasts_____________?
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A. All of the above are true

B. The plasma membrane of osteoclasts adjacent to bone that is being resorbed is known as striated or ruffled border

C. Contain lysosomes with acid phosphates

D. Monocytes are precursor cells of osteoclasts

196. Nutritional supply of the ameloblasts during most of their life cycle is from the_____________?
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A. Reduced dental organ

B. Odontoblastic processes

C. Dental sac

D. Dental pulp

197. Dentino enamel junction is_________________?
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A. Straight

B. Scalloped and the convexities are directed towards enamel

C. Scalloped and the convexities are directed towards dentin

D. Non-scalloped

198. Korffs fibres are seen in______________?
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A. Mantle dentin

B. Reactionary dentin

C. Secondary dentin

D. Indeed dermal tubules

199. All factors govering dentine permeability EXCEPT_______________?
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A. Smear layer

B. Length of dentinal tubules

C. Fluid convection

D. Diffusion coefficient

200. The vascular supply of the periodontal ligament is______________?
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A. A net like plexus that runs closer to the bone than to the cementum

B. Greatest in the middle-third of a multirooted tooth

C. Greatest in the middle-third of a single rotted tooth

D. A net like plexus that runs closer to the cementum than to the bone

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