Oral Histology MCQs

Page No. 20

Which of the following is correct?


a Each rod is formed by 4 ameloblasts

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bEach ameloblast contributes to 4 different rods

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cHead of the rod is formed by one ameloblasts, and tail is formed by three other ameloblasts

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dAll of the above

✓


View Answer All of the above

Dentinal tubules are calcified in_______________?


aSclerotic dentin

✓


b Primary dentin

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cSecondary dentin

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dInterglobular dentin

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View Answer Sclerotic dentin

Dentin formed through out the life is______________?


a Sclerotic dentin

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b Secondary dentin

✓


cReparative dentin

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dAll of the above

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View Answer Secondary dentin

S shape of dentinal tubules is due to______________?


a Incremental deposition

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b Peritubular dentin

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cCrowding of odontoblasts

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dDue to excess amount of organic component

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All of the following is true about dentinal tubules except______________?


aInner pulpal layer contains more dentinal tubules than outer dentin layer

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bThe diameter of dentin tubules ranges from 5 to 7μm

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cThe diameter of dentinal tubule is more at pulpal layer than outer layer

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dThe bonding is more on the inner layer of dentin compared to outer surface

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The average diameter of coronal dentinal tubules near the pulp is____________?


a0.2-0.5 microns

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b2-3 microns

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c0.2-0.3 microns

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d7 microns

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View Answer 2-3 microns

All factors govering dentine permeability EXCEPT_______________?


a Smear layer

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bFluid convection

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cLength of dentinal tubules

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dDiffusion coefficient

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View Answer Fluid convection

Compared to the inter tubular dentin, peritubular dentin is characterized by which of the following ?


aGreater stainability

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bLasser content of inorganic salts

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cgreater content of inorganic salts

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dGreater content of large collagen fibres

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During the formation of primary teeth_______________?


a Enamel forms more cervically than dentin

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bEnamel forms faster than dentin

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cDentin forms faster than enamel

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dProcesses of their cells remain in content with each other

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Transmission of stimulus across dentin is______________?


aDirect activation of nerve endings

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bCorrelated with the innervation density of the dentin

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cStimulus induced fluid flow

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d There is no transmission of stimulus across dentin

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