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.

101. The percentage of inorganic matter in fully developed enamel is about____________?

A. 66%
B. 76%
C. 86%
D. 96%

102. Non acidic, nonionic protein which helps in enamel mineralization _______________?

A. Tuftelin
B. Sheathlin
C. Enamelin
D. Amelogenin

103. Which of the following is correct about enamel crystals ?

A. Same as dentin crystals
B. Contains organic portion in the center
C. Roughly texagonal in shape
D. Their diameter is about 5 microns in size

104. Maximum amount of phosphate is seen in_______________?

A. Bone
B. Enamel
C. Gingiva
D. Dentin

105. Neonatal lines are seen in_______________?

A. Enamel of deciduous incisiors
B. Enamel of permanent incisors
C. Enamel of premolars
D. Dentin of all teeth, as if is formed first

106. narled enamel is seen in_____________?

A. Proximal surface of tooth
B. Cervical region of tooth
C. Cusp tips of tooth
D. All of the above

107. The thickness of prismless enamel in diciduous teeth is______________?

A. 25 μ m
B. 50 μ m
C. 75 μ m
D. 100 μ m

108. Enamel rods at the cervical area at the occlusal edge and incisal lip in permanent teeth are______________?

A. Straight
B. Shallow
C. Bent
D. Curved

109. Incremental lines of Retzius appear_____________?

A. As lines in the enamel running at right angles to the enamel surface
B. As lines in the dentin running at right angles to the dentino-enamel junction
C. In enamel and follow the apposition pattern
D. In dentin and follow the appositional pattern

110. Enamel spindles are formed by______________?

A. Cracks
B. Ameloblasts
C. Odontoblasts
D. Hypocalcified rods