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: Interglobular dentin represents areas of
A) Hypermineralization
B) Uncalcified dentin
C) Complete calcification
D) Resorbed dentin
✅ Correct Answer: B
Explanation: Interglobular dentin is poorly calcified dentin found in the crown.
Q: Lines of Retzius are incremental lines in
A) Enamel
B) Pulp
C) Dentin
D) Cementum
✅ Correct Answer: A
Explanation: Lines of Retzius represent rhythmic enamel deposition during tooth development.
Q: Hertwig’s epithelial root sheath determines
A) Cementum type
B) Enamel thickness
C) Crown shape
D) Root shape
✅ Correct Answer: D
Explanation: This sheath guides root development and root dentin formation.
Q: The reduced enamel epithelium forms during
A) Mineralization
B) Root formation
C) Eruption
D) Attrition
✅ Correct Answer: C
Explanation: Reduced enamel epithelium protects enamel before and during tooth eruption.
Q: Tomes’ process belongs to
A) Cementoblast
B) Odontoblast
C) Fibroblast
D) Ameloblast
✅ Correct Answer: D
Explanation: Tomes’ process is an extension of ameloblasts aiding in enamel rod formation.
Q: Sharpey’s fibers are embedded in
A) Dentin and cementum
B) Bone and pulp
C) Enamel and pulp
D) Cementum and bone
✅ Correct Answer: D
Explanation: Sharpey’s fibers anchor the periodontal ligament to cementum and alveolar bone.
Q: Striae of Retzius appear as
A) Enamel growth lines
B) Pulpal extensions
C) Radial dentin lines
D) Cementum bands
✅ Correct Answer: A
Explanation: These are enamel lines representing rhythmic enamel apposition.
Q: The enamel-dentin junction is located between
A) Cementum and dentin
B) Enamel and pulp
C) Cementum and bone
D) Enamel and dentin
✅ Correct Answer: D
Explanation: The EDJ marks the boundary between enamel and underlying dentin.
Q: Secondary dentin forms after
A) Eruption
B) Birth
C) Pulp death
D) Root formation
✅ Correct Answer: A
Explanation: Secondary dentin is laid down after eruption as a normal aging process.
Q: Enamel rods are oriented
A) Randomly
B) Toward DEJ
C) Perpendicular to surface
D) Parallel to pulp
✅ Correct Answer: C
Explanation: Enamel rods run perpendicular to the enamel surface, enhancing strength.