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: Secondary dentin is deposited
A) After tooth eruption
B) In response to decay only
C) Before root formation
D) Throughout life after eruption
✅ Correct Answer: D
Explanation: Secondary dentin forms slowly after root formation and continues throughout life, reducing pulp size.
Q: The cell-rich zone of the pulp lies
A) Beneath the odontoblastic layer
B) Above cementum
C) Within the periodontal ligament
D) Adjacent to enamel
✅ Correct Answer: A
Explanation: The cell-rich zone lies beneath the odontoblast layer and contains numerous fibroblasts and undifferentiated cells.
Q: Cementocytes are found in
A) Dentin tubules
B) Cellular cementum
C) Acellular cementum
D) Pulp chamber
✅ Correct Answer: B
Explanation: Cementocytes are embedded in the matrix of cellular cementum and help maintain the surrounding tissue.
Q: The peritubular dentin is characterized by being
A) Formed by cementoblasts
B) Less mineralized
C) Located in pulp
D) More mineralized than intertubular dentin
✅ Correct Answer: D
Explanation: Peritubular dentin is more mineralized and lines the walls of dentinal tubules.
Q: Striae of Retzius are best observed in
A) Histological pulp slides
B) Cross-sections of dentin
C) Longitudinal bone sections
D) Ground sections of enamel
✅ Correct Answer: D
Explanation: Striae of Retzius appear in enamel ground sections as concentric rings indicating growth.
Q: The outer enamel epithelium of the enamel organ functions to
A) Protect the enamel organ
B) Stimulate pulp formation
C) Form enamel rods
D) Lay down dentin
✅ Correct Answer: A
Explanation: The outer enamel epithelium provides a protective layer and maintains the shape of the enamel organ.
Q: Hunter-Schreger bands are visible due to changes in
A) Pulp cell density
B) Cementum thickness
C) Salivary gland activity
D) Orientation of enamel rods
✅ Correct Answer: D
Explanation: Hunter-Schreger bands represent optical phenomena caused by changing orientations of enamel rods.
Q: A reduced enamel epithelium forms after
A) Pulp exposure
B) Enamel maturation
C) Cementum formation
D) Root resorption
✅ Correct Answer: B
Explanation: Reduced enamel epithelium is the compressed layer of ameloblasts and other enamel organ cells after enamel formation completes.
Q: The junction between enamel and cementum is called
A) Enamel-dentin junction
B) Pulp-cementum junction
C) Alveolar ridge
D) Cementoenamel junction
✅ Correct Answer: D
Explanation: The cementoenamel junction marks the interface between the crown and root covering.
Q: Predentin lies adjacent to the
A) Odontoblasts
B) Enamel
C) Periodontal ligament
D) Cementum
✅ Correct Answer: A
Explanation: Predentin is the unmineralized layer of dentin located adjacent to the odontoblastic layer.