All Free Oral Histology MCQs with Answers
Every Oral Histology question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
332 questions · page 17 of 17
- A. 100
- B. 75
- C. 50
- D. 25
Explanation: As the cusps approach and penetrate the oral epithelium, eruption may accelerate to roughly 75 μm per day.
Correct answer: 75- A. Hydrostatic
- B. Masticatory pressure
- C. Oncotic pressure
- D. Vascular pressure
Explanation: Masticatory forces contribute to the loosening and eventual shedding of deciduous teeth after root resorption has begun.
Correct answer: Masticatory pressure- A. Saline
- B. Xylene
- C. 10% Formalin
- D. 10% alcoholOrder DNA Kits
Explanation: Extracted teeth are commonly fixed and preserved in 10% neutral buffered formalin, which prevents decomposition and maintains tissue…
Correct answer: 10% Formalin- A. Alkaline phosphatase
- B. Acid phosphatase
- C. Adenosine triphosphate
- D. Amino peptidase
Explanation: Alkaline phosphatase releases phosphate from organic compounds and promotes formation of hydroxyapatite crystals, making it closely…
Correct answer: Alkaline phosphatase- A. Hydrodynamic theory
- B. Periodontal ligament traction theory
- C. Clone theory
- D. Vascular theory
Explanation: The periodontal ligament traction theory attributes eruption to forces generated by fibroblasts and periodontal ligament fibers pulling…
Correct answer: Periodontal ligament traction theory- A. Physiological tooth migration
- B. Passive eruption
- C. Active eruption
- D. None of the above
Explanation: Active eruption is the axial movement of a tooth toward the oral cavity and occlusal plane, helping it reach or close the intermaxillary…
Correct answer: Active eruption- A. Booster Mechanism
- B. Cartier/s Adenosine Triphosphate theory
- C. Alkaline Phosphatase theory
- D. Seeding theory
Explanation: Epitaxy is crystal growth guided by the surface arrangement of an existing crystal, which is represented in mineralization by the seeding…
Correct answer: Seeding theory- A. Enamel prismatic arrangement
- B. Dentinal tubule arrangement
- C. Primary and secondary dentin
- D. Mineral content
Explanation: Primary and permanent enamel differ in the arrangement and orientation of their enamel prisms, especially near the cervical region.
Correct answer: Enamel prismatic arrangement- A. Succedaneous teeth
- B. Deciduous teeth
- C. Permanent teeth
- D. None of the above
Explanation: The gubernacular canal and its connective-tissue cord are associated with succedaneous permanent teeth, guiding them toward the oral…
Correct answer: Succedaneous teeth- A. Lingual to primary teeth
- B. A and B
- C. Labial to primary teeth
- D. Inferior to primary teeth
Explanation: Permanent mandibular incisor germs develop lingual to their primary predecessors and are initially positioned inferior or apical to them.
Correct answer: A and B- A. Primary teeth
- B. Both A and B
- C. Permanent teeth
- D. None of the above
Explanation: The gubernacular canal provides an eruption pathway for permanent successor teeth, especially those replacing primary teeth.
Correct answer: Permanent teeth- A. Aids in formation of secondary dentin slowing down resorption
- B. Becomes a fibrotic non-vital mass
- C. Initiates resorption from the inner surface of roots
- D. Plays a passive role
Explanation: Physiological resorption of primary roots is carried out mainly by odontoclasts on the external root surface, while the dental pulp…
Correct answer: Plays a passive role