Histology, derived from the Greek words “histo,” meaning tissue, and “logy,” meaning science, is the scientific discipline dedicated to the study of tissues. By delving into oral histology and embryology, individuals can establish a robust understanding of oral biology. The subject encompasses the examination of cellular and tissue development and structure, including the various stages of tooth development and maturation. Areas of focus include the constituents of tissues such as cells, intercellular substances, tissue fluids, and components of human teeth like enamel, dentin, and dental pulp. Gurumcqs.com offers Oral Histology Multiple-Choice Questions (MCQs) along with answers, carefully curated from reputable reference books on oral histology. These MCQs are valuable not only for academic purposes but also for interview preparation, entrance exams, competitive assessments, and certifications, catering to individuals at all levels of expertise, whether experienced professionals, newcomers, or students. Additionally, those interested can explore Oral Pathology MCQs for further study.

11. Which of the areas of the tooth is most sensitive during cavity preparation ?

A. Enamel (anterior teeth)
B. Enamel (Posterior teeth)
C. Dentin
D. Dentinoenamel junction

12. Transmission of stimulus across dentin is______________?

A. Direct activation of nerve endings
B. Correlated with the innervation density of the dentin
C. Stimulus induced fluid flow
D. There is no transmission of stimulus across dentin

13. During the formation of primary teeth_______________?

A. Enamel forms more cervically than dentin
B. Enamel forms faster than dentin
C. Dentin forms faster than enamel
D. Processes of their cells remain in content with each other

14. Compared to the inter tubular dentin, peritubular dentin is characterized by which of the following ?

A. Greater stainability
B. Lasser content of inorganic salts
C. greater content of inorganic salts
D. Greater content of large collagen fibres

15. All factors govering dentine permeability EXCEPT_______________?

A. Smear layer
B. Fluid convection
C. Length of dentinal tubules
D. Diffusion coefficient

16. The average diameter of coronal dentinal tubules near the pulp is____________?

A. 0.2-0.5 microns
B. 2-3 microns
C. 0.2-0.3 microns
D. 7 microns

17. All of the following is true about dentinal tubules except______________?

A. Inner pulpal layer contains more dentinal tubules than outer dentin layer
B. The diameter of dentin tubules ranges from 5 to 7μm
C. The diameter of dentinal tubule is more at pulpal layer than outer layer
D. The bonding is more on the inner layer of dentin compared to outer surface

18. S shape of dentinal tubules is due to______________?

A. Incremental deposition
B. Peritubular dentin
C. Crowding of odontoblasts
D. Due to excess amount of organic component

19. Dentin formed through out the life is______________?

A. Sclerotic dentin
B. Secondary dentin
C. Reparative dentin
D. All of the above

20. Dentinal tubules are calcified in_______________?

A. Sclerotic dentin
B. Primary dentin
C. Secondary dentin
D. Interglobular dentin