Oral Histology MCQs

Page No. 20

Which of the following is correct?


a Each rod is formed by 4 ameloblasts


bEach ameloblast contributes to 4 different rods


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


dAll of the above


View Answer All of the above

Dentinal tubules are calcified in_______________?


aSclerotic dentin


b Primary dentin


cSecondary dentin


dInterglobular dentin


View Answer Sclerotic dentin

Dentin formed through out the life is______________?


a Sclerotic dentin


b Secondary dentin


cReparative dentin


dAll of the above


View Answer Secondary dentin

S shape of dentinal tubules is due to______________?


a Incremental deposition


b Peritubular dentin


cCrowding of odontoblasts


dDue to excess amount of organic component



All of the following is true about dentinal tubules except______________?


aInner pulpal layer contains more dentinal tubules than outer dentin layer


bThe diameter of dentin tubules ranges from 5 to 7μm


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


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



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


a0.2-0.5 microns


b2-3 microns


c0.2-0.3 microns


d7 microns


View Answer 2-3 microns

All factors govering dentine permeability EXCEPT_______________?


a Smear layer


bFluid convection


cLength of dentinal tubules


dDiffusion coefficient


View Answer Fluid convection

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


aGreater stainability


bLasser content of inorganic salts


cgreater content of inorganic salts


dGreater content of large collagen fibres



During the formation of primary teeth_______________?


a Enamel forms more cervically than dentin


bEnamel forms faster than dentin


cDentin forms faster than enamel


dProcesses of their cells remain in content with each other



Transmission of stimulus across dentin is______________?


aDirect activation of nerve endings


bCorrelated with the innervation density of the dentin


cStimulus induced fluid flow


d There is no transmission of stimulus across dentin



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