oral histology MCQs – Page 5

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

oral histology Mcqs

A. A tissue from which tooth erupts

B. A tumour of the jaw

C. A cell from which tooth enamel is formed:

D. Pertaining to dentin

82. In considering the process of eruption, the pre-functional eruptive stage of a tooth begins when the_____________?
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A. Dental lamina begins forming

B. Cap stage begins

C. Bud stage begins

D. Bell stage begins

83. Stellate reticulum is seen in______________?
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A. Enamel organ

B. Dental lamina

C. All of the above

D. Hertwigs root sheath

84. The periodontal ligament is approximately_____________?
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A. 0.75 mm in thickness

B. mm in thickness

C. 0.25 mm in thickness

D. 0.5 mm in thickness

85. The formation of the dental lamina is initiated by______________?
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A. Forebrain

B. Odontoblasts

C. Neural crest cells

D. Rathkes pouch

86. Thin leaf like structures that extend from enamel surface in to DEJ are____________?
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A. Enamel spindles

B. Enamel tufts

C. Enamel lamella

D. Perikymata

87. Any insult to cells in apposition stage result in______________?
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A. Hutchinsons incisor

B. Enamel hypoplasia

C. Osteodentin formation

D. Anodontia

88. Which of the following statement is correct_________________?
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A. The bodies of rods are near occlusal and incisal surfaces, where as the tails point cervically

B. All of the above

C. The apatite crystals are parallel to bodies and deviate 65 from the tails

D. In cross sections enamel rods appear hexagonal and resembles fish scales

89. Inter globular dentin results due to_____________?
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A. Artifact in light microscopy

B. Disturbance in dentinal tubules

C. Failure of coalescence of calcospherities

D. Fracture of the dentin

90. On microscopic examination enamel rods have___________?
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A. None of the above

B. Lanullate appearance in cross-section

C. Key hole appearance in cross section

D. Paddle appearance in cross section

91. Chronological hypoplasia is_____________?
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A. Hypoplasia of systemic origin

B. Hypoplasia of local origin

C. Hypoplasia of hereditary origin

D. None of the above

92. Which of the following is true of cellular cementum ?
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A. Seen at the coronal portion of the tooth

B. Forms after the eruption of the tooth

C. Formation is a slow process

D. Forms during root formation

93. Which of the following is true______________?
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A. Cementum contain type I collagen predominantly

B. Cementodentinal junction is sometimes scallopes in deciduous teeth and smooth in permanent teeth

C. All of the above

D. The uncalcified matrix of cementum is called cementoid

94. The cells of the dental pulp which are responsible for the deposition of reparative dentin are_________?
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A. Osteocytes

B. Osteoblasts

C. Ameloblasts

D. Odontoblasts

95. Temporary structures in enamel organ are (before enamel formation) ?
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A. Enamel knot

B. Enamel cord

C. Both A and B

D. Enamel Cuticle

96. Organic portion can be separated from the mineral by_____________?
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A. Incineration/organic chelation

B. Devitrification

C. Combustion

D. Decalcification

97. Dystrophic calcifiaction is seen most commonly in which of the following oral tissues__________?
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A. Periodontal ligament

B. Pulp

C. Enamel

D. Dentin

98. The plexus of Rashkov is present in which of the following zones in pulp ?
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A. Cell free zone

B. Pulp core

C. Cell rich zone

D. Odontoblastic zone

99. Periodontal ligament is made up of____________?
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A. Type I collagen

B. Type I and Type IV collagen

C. Type I and Type III collagen

D. Type I and Type II collagen

100. Age changes in periodeontal ligament include which of the following ?
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A. Decreased in number of cementicles

B. Increased thickness

C. Increased vascularity

D. Increased fibroplasia

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