Oral Histology MCQs

Page No. 11

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


aHyperplasia


bHypoplacification


cNormal development


dInterstitial development



Enamel spindles are formed by______________?


aCracks


bAmeloblasts


cOdontoblasts


dHypocalcified rods


View Answer Odontoblasts

Incremental lines of Retzius appear_____________?


aAs 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 enamel and follow the apposition pattern


dIn dentin and follow the appositional pattern



Enamel rods at the cervical area at the occlusal edge and incisal lip in permanent teeth are______________?


aStraight


bShallow


cBent


dCurved


View Answer Bent

The thickness of prismless enamel in diciduous teeth is______________?


a25 μ m


b50 μ m


c75 μ m


d100 μ m


View Answer 25 μ m

narled enamel is seen in_____________?


aProximal surface of tooth


b Cervical region of tooth


cCusp tips of tooth


dAll of the above


View Answer Cusp tips of tooth

Neonatal lines are seen in_______________?


aEnamel of deciduous incisiors


bEnamel of permanent incisors


cEnamel of premolars


dDentin of all teeth, as if is formed first



Maximum amount of phosphate is seen in_______________?


aBone


bEnamel


cGingiva


d Dentin


View Answer Enamel

Which of the following is correct about enamel crystals ?


aSame as dentin crystals


bContains organic portion in the center


cRoughly texagonal in shape


dTheir diameter is about 5 microns in size



Non acidic, nonionic protein which helps in enamel mineralization _______________?


aTuftelin


b Sheathlin


c Enamelin


dAmelogenin


View Answer Amelogenin

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