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.

91. calcification in enamel starts at____________?

A. Enamel matrix
B. Root
C. CEJ
D. DEJ

92. The enamel has no capacity of self repair because______________?

A. It has only a small percent of organic content
B. Its formative cells are lost once it is completely formed
C. It is essentially a keratin tissue and has no blood vessels
D. It has no direct connection with the active cells of the dental pulp

93. The formative cells of which of the following dental tissues disappear once tissue is formed___________?

A. Enamel
B. Dentin
C. Periodontal ligament
D. Cementum

94. On microscopic examination enamel rods have___________?

A. Key hole appearance in cross section
B. Paddle appearance in cross section
C. Lanullate appearance in cross-section
D. None of the above

95. All are true about the striae of retzius except___________?

A. Constitute the rest lines with in the enamel rods
B. Have high inorganic content
C. They are areas of increased porosity
D. Allow the movement of water and small ions

96. Ionic exchange between enamel surface and environment______________?

A. Does not take place once enamel surface and invironment
B. Stops after 2 years of eruption
C. Continues till adult life
D. Continues through out life

97. Incremental lines of retzius are seen in______________?

A. Enamel
B. Dentin
C. Cementum
D. Pulp

98. Blunt cell processes seen on the developing ameloblasts are celled as________________?

A. Tomes fibres
B. Tomes layer
C. Tomes processes
D. Odontoblastic processes

99. Following is not an external manifestation of enamel________________?

A. Enamel tufts
B. Enamel lamella
C. Incremental lines of enamel
D. Enamel cuticle

100. Hunter Schreger band are____________?

A. Dark and light bands of enamel seen in longitudinal ground section
B. Dark and light bands of enamel seen in horizontal ground section
C. Dark and light brands of dentin seen in longitudinal section
D. Dark and light bands of dentin seen in horizontal