oral histology MCQs – Page 4

Practise focused oral histology questions with marked answers for exam preparation and subject revision.

oral histology Mcqs

61. Basic metabolic unit of bone is_______________?
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A. Osteoclast

B. Osteocyte

C. Osteoblast

D. Osteon

62. The type of bone present in the labial area of anterior teeth is_________________?
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A. Cancellous

B. Cortical

C. Exophytic

D. Osteophytic

63. The content of saliva include all except____________?
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A. Amylase

B. Urea

C. Lipase

D. Lysoenzyme

64. Which of the following is not true___________?
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A. Alveolar bone proper surrounds the root and gives attachment to fibres of periodontal ligament

B. The cortical plates are thinner in maxilla than in mandible

C. They are thickest in anterior portion of jaw

D. supporting alveolar bone surrounds the alveolar bone proper and supports the socket

65. Which of the following is true?
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A. All of the above

B. CAMP or cyclic adenosine monophosphate levels are increased on pressure side of bone and this results in bone resorption

C. Cutting cone or resorption tunnel is the area of resorption seen in alveolar bone

D. Immature born / embryonic bone seen during fracture healing contains less calcified material and greater number of large osteocytes

66. The process of recesses formation in maxillary sinus is most frequently seen with________________?
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A. Zygomatic process

B. Palatine process

C. Frontal process

D. Alveolar process

67. In multirooted teeth, formation of multiple roots is due to presence of_____________?
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A. Epithelial diaphragm

B. Toot bud division or bell stage

C. None of the above

D. Cell rests of Malassez

68. Root lengthening is contributed by____________?
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A. All of the above

B. Intermediate cementum

C. Acellular cementum

D. Cellular cementum

69. The dental pulp is derived form____________?
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A. Stellate reticulum

B. Dental sac

C. Odontoblasts

D. Dental papilla

70. Lip furrow band is______________?
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A. Basal lamina

B. Successional lamina

C. Dental lamina

D. Vestibular lamina

71. True about direction of enamel rods______________?
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A. In cervical region of permanent teeth, they deviate in apical direction

B. All of the above

C. They are almost vertical near the incisal edge (or) cusp tip areas

D. In the cervical third of deciduous crowns they are almost horizontal in direction

E. They originate at right angle to dentin surface

72. Periodontal fibres joining cemental surface of one tooth, to cemental surface of adjacent tooth are called____________?
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A. Gingivodental

B. Cemental fibres

C. Horizontal fibres

D. Transseptal fibres

73. The formative cells of which of the following dental tissues disappear once tissue is formed___________?
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A. Dentin

B. Enamel

C. Cementum

D. Periodontal ligament

74. Atypical or osteodentin is formed due to disturbance during____________?
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A. Apposition

B. Initiation

C. Morphodifferentiation

D. Histodifferentiation

75. Sharpeys fibres are present in_______________?
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A. Periosteum

B. Bone

C. All of the above

D. Periodontal ligament

76. The diameter of the rod is______________?
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A. 9 ? m

B. 4 ? m

C. 7 ? m

D. 2 ? m

77. calcification in enamel starts at____________?
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A. Enamel matrix

B. CEJ

C. DEJ

D. Root

78. Compared to the inter tubular dentin, peritubular dentin is characterized by which of the following ?
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A. Greater stainability

B. Lasser content of inorganic salts

C. Greater content of large collagen fibres

D. greater content of inorganic salts

79. The radicular pulp is continous with tissues of the periapical area via the____________?
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A. Pulp chamber

B. Mental foramen

C. Pulp canal

D. Apical foramen

80. Accentuated incremental lines in dentin due to disturbances in matrix and mineralization process is_____________?
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A. Incremental lines of retzius

B. None of the above

C. Incremental lines of vonebner

D. Contour lines of owen

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