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.

81. Among the following the structure that is most calcified is_______________?

A. Enamel lamella
B. Enamel rod
C. Enamel spindle
D. Enamel tuft

82. Synthesis of enamel matrix proteins occurs in the________________?

A. Outer enamel epithelium
B. Ameloblast
C. Stratum intermedium
D. Stratum granulosum

83. Enamel is laid down______________?

A. Mainly by odontoblasts
B. Mainly by ameloblasts
C. Only on odontoblasts
D. Only by ameloblasts

84. The striking difference between enamel and other mineralized tissues is______________?

A. Presence of high percentage of organic matrix
B. Presence of incremental lines
C. Enamel has high reparative capacity
D. Most of organic component is lost during mineralization

85. Formation of dentin by odontoblasts begins in_______________?

A. Morphogenic stage
B. Organizing stage
C. Desmolytic stage
D. Formative stage

86. Chronological hypoplasia is_____________?

A. Hypoplasia of local origin
B. Hypoplasia of systemic origin
C. Hypoplasia of hereditary origin
D. None of the above

87. Dentino enamel junction is_________________?

A. Non-scalloped
B. Straight
C. Scalloped and the convexities are directed towards dentin
D. Scalloped and the convexities are directed towards enamel

88. True about direction of enamel rods______________?

A. They originate at right angle to dentin surface
B. They are almost vertical near the incisal edge (or) cusp tip areas
C. In the cervical third of deciduous crowns they are almost horizontal in direction
D. In cervical region of permanent teeth, they deviate in apical direction
E. All of the above

89. The diameter of the rod is______________?

A. 4 μ m
B. 9 μ m
C. 7 μ m
D. 2 μ m

90. Inorganic content of enamel is about______________?

A. 35%
B. 50%
C. 4%
D. 96%