Oral Histology MCQs

Page No. 28

The main function of horizontal fibres of P.D ligament is____________?


a Prevent extrusion

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bPrevent rotation

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cMaintains the mesiodistal width

✓


dAll of the above

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Narrowing of periodontal ligament in labially placed mandibular canine with age is due to_____________?


aDue to deposition of cementum and bone

✓


b Down growths of gingival epithelium

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cGingival cysts formed from cell rests

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d Reversal of function of horizontal and oblique fibres

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Centre of the disc in TMJ is_____________?


aAvascular

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bDevoid of nervous tissue

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c Avascular & deviod of nervous tissue

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dNone of the above

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The component of future T.M.J shows development at _____________?


a6 weeks

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b10 weeks

✓


c 18 weeks

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d16 weeks

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View Answer 10 weeks

A special feature of the periodontal ligament fibroblasts is______________?


aThe number or organelles

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bPresence of actin fibres and shape change

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c size of the cells

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dCollagen fibre formation

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Which of the following is not the principle fibre group of the periodontal ligament___________?


aHorizontal

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b Oblique

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cAlveolar crest

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dTransseplat

✓


View Answer Transseplat

Collagen molecule exhibits all of the following features except_____________?


a Triple pleated sheath

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b Mostly contains glycine residues

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cExhibit cross striations at 64 μm

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dIntracellular in nature

✓



Age changes in periodeontal ligament include which of the following ?


aIncreased fibroplasia

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b Increased vascularity

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cIncreased thickness

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dDecreased in number of cementicles

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View Answer Increased fibroplasia

The attached apparatus of tooth is composed of______________?


aGingiva, cementum and alveolar bone

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b Gingiva and cementum

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cCementum and periodontal ligament

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dPeridontal ligament the cementum and the alveolar bone

✓



Fibres of periodontal ligament embedded in the bone are_____________?


aSharpey’s fibres

✓


b Tomes fibres

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cElastic fibres

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dRay’s fibres

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View Answer Sharpey’s fibres

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