medical MCQs – Page 509

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

medical Mcqs

1. oral anatomy 2. microbiology 3. oral pathology and medicine 4. physiology 5. biochemistry 6. general anatomy 7. dental materials 8. pharmacology 9. pathology 10. oral histology

10161. Membrana performative is seen in_________________?
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A. Cap stage

B. Advanced bell stage

C. Bud stage

D. Bell stage

10162. At the CEJ cementum overlaps enamel about____________?
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A. 70 to 75%

B. 60 to 65%

C. 65 to 70%

D. 55 to 60%

10163. Hardness of fully mineralized cementum is_____________?
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A. Equal dentin

B. None of the above

C. More than dentin

D. Less than dentin

10164. The bud, cap and bell stage of the developing tooth are based, on growth of the______________?
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A. Enamel organ

B. Dental papilla

C. Dental sac

D. Stellate reticulum

10165. Enamel spindles are formed by______________?
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A. Hypocalcified rods

B. Ameloblasts

C. Cracks

D. Odontoblasts

10166. The attached apparatus of tooth is composed of______________?
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A. Cementum and periodontal ligament

B. Gingiva and cementum

C. Gingiva, cementum and alveolar bone

D. Peridontal ligament the cementum and the alveolar bone

10167. Propriceptors are seen in all except______________?
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A. TMJ

B. Skeletal muscle

C. None of the above

D. Pulp

10168. The relationship between the pulpal and periodontal tissue complex begins during dental development at_____________?
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A. Adolescent stage

B. Embryonic stage

C. None of the above

D. 5-10 years

10169. All of the following is true about dentinal tubules except______________?
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A. Inner pulpal layer contains more dentinal tubules than outer dentin layer

B. The diameter of dentin tubules ranges from 5 to 7?m

C. The diameter of dentinal tubule is more at pulpal layer than outer layer

D. The bonding is more on the inner layer of dentin compared to outer surface

10170. Cellular cementum is____________?
0

A. Less irregular

B. Less calcified than acellular type

C. First formed cementum

D. More calcified than acellular type

10171. Maximum amount of phosphate is seen in_______________?
0

A. Dentin

B. Bone

C. Enamel

D. Gingiva

10172. The size of apical foramen of maxillary teeth in adult is______________?
0

A. 0.7 mm

B. 0.3 mm

C. 0.4 mm

D. 0.2 mm

10173. The small ridges, perikymata, seen on facial surfaces of canines are the result of_____________?
0

A. Hypoplacification

B. Hyperplasia

C. Interstitial development

D. Normal development

10174. Intermediate cemental layer_____________?
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A. Does not exhibit features of either dentin of cementum

B. Represents area of entrapment of hertwigs sheath in dentin or cementum

C. Predominantly seen in apical tow thirds of roots of molars and premolars and is rare in incisors or deciduous teeth

D. All of the above are correct

10175. If cementum is not formed______________?
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A. Exforliation of teeth occur

B. No change occurs

C. Delayed eruption

D. Ankylosis may occur

10176. Butt joint in cementoenamel junctions seen is _________% of cases?
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A. 60%

B. 90%

C. 30%

D. 10%

10177. Mirgration of odontoblasts into dentinal tubules occurs during ________________?
0

A. Water irrigation

B. None of the above

C. Cavity preparation

D. Dehydration

10178. Non acidic, nonionic protein which helps in enamel mineralization _______________?
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A. Enamelin

B. Amelogenin

C. Tuftelin

D. Sheathlin

10179. Fluid flow, in or out of the dentinal tubules is proportional to the tuble diameter by______________?
0

A. Square of the diameter

B. Third power of the diameter

C. Fourth power of the diameter

D. Sixth power of the diameter

10180. Ionic exchange between enamel surface and environment______________?
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A. Does not take place once enamel surface and invironment

B. Stops after 2 years of eruption

C. Continues through out life

D. Continues till adult life

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