Oral Histology MCQs
Oral Histology MCQs are tailored for dentistry students seeking mastery of tooth development and oral tissue structure. These questions focus on enamel formation, dentin-pulp complex, cementum, alveolar bone, and salivary glands. They're excellent for preparation of BDS, MDCAT, and related tests.
Q: Hunter-Schreger bands appear due to
A) Formation of secondary dentin
B) Presence of collagen
C) Alternating directions of enamel rods
D) Variation in dentin tubules
✅ Correct Answer: C
Explanation: These bands are optical effects seen in enamel because of changes in the orientation of enamel rods.
Q: Fibers inserting into both cementum and alveolar bone are called
A) Oblique fibers
B) Circular fibers
C) Apical fibers
D) Sharpey’s fibers
✅ Correct Answer: D
Explanation: Sharpey’s fibers are collagenous fibers embedded in both cementum and alveolar bone, securing the tooth.
Q: Tooth eruption is aided by the
A) Dental lamina
B) Dental sac
C) Stellate reticulum
D) Reduced enamel epithelium
✅ Correct Answer: D
Explanation: The reduced enamel epithelium fuses with oral epithelium to form the eruption pathway.
Q: The layer separating enamel and dentin is called the
A) Periodontal ligament
B) Cementoenamel junction
C) Dentinoenamel junction
D) Pulpal boundary
✅ Correct Answer: C
Explanation: The dentinoenamel junction (DEJ) is a scalloped interface that binds dentin and enamel securely.
Q: Secondary cementum is primarily found in the
A) Root apex
B) Cervical third
C) Crown
D) Enamel surface
✅ Correct Answer: A
Explanation: Secondary cementum is cellular and forms mainly at the root apex and interradicular areas after tooth eruption.
Q: Peritubular dentin is most prominent in
A) Deep dentin near pulp
B) Sclerotic dentin
C) Old dentin near enamel
D) Newly erupted teeth
✅ Correct Answer: B
Explanation: In sclerotic dentin, peritubular dentin becomes more calcified and narrows the dentinal tubules.
Q: Cementum thickens with age due to
A) Continuous cementoblast activity
B) Enamel deposition
C) Decreased blood flow
D) Pulp regression
✅ Correct Answer: A
Explanation: Cementoblasts remain active and deposit cementum throughout life, especially in response to functional stress.
Q: The anatomical crown is defined as the portion of the tooth
A) Embedded in bone
B) Covered by enamel
C) Covered by cementum
D) Visible in the mouth
✅ Correct Answer: B
Explanation: The anatomical crown is the portion covered by enamel, regardless of its position in the mouth.
Q: The structure that first indicates tooth development is the
A) Dental lamina
B) Enamel knot
C) Cervical loop
D) Dental sac
✅ Correct Answer: A
Explanation: The dental lamina initiates the formation of tooth buds and marks the beginning of odontogenesis.
Q: The source of cells forming the periodontal ligament is the
A) Dental follicle
B) Outer enamel epithelium
C) Dental papilla
D) Enamel knot
✅ Correct Answer: A
Explanation: The dental follicle gives rise to the cementum, periodontal ligament, and alveolar bone.