Free Histology of Tooth Development MCQs with Answers

• A. 6 weeks
• B. 18 weeks
• C. 10 weeks
• D. 16 weeks

Explanation: The developing components of the temporomandibular joint become identifiable at about the tenth week of embryonic development; the later…

• A. Endochondral ossification only
• B. Both of the above
• C. Membranous ossification only
• D. None of the above

Explanation: The mandible forms mainly by intramembranous ossification, but secondary cartilages such as the condylar cartilage contribute through…

• A. Stapes
• B. Styloid process
• C. Malleus and incus
• D. Superior part of hyoid bone

Explanation: The second pharyngeal arch forms the stapes, styloid process, and superior part of the hyoid bone.

• A. It has a major role
• B. It has a minor role
• C. None of the above
• D. It does not have any role

Explanation: Meckel’s cartilage does not directly form the mandible, which develops mainly by intramembranous ossification lateral to it.

• A. Alveolar bone
• B. Whole face
• C. Mandible
• D. Basal bone

Explanation: The alveolar process develops in close association with developing teeth and largely disappears when teeth are absent.

• A. 6th week of IU
• B. 8th week of IU
• C. 10th week of IU
• D. 18th week of IUOral & Dental Care

Explanation: The dental papilla, which gives rise to the pulp, becomes identifiable during the eighth intrauterine week.

• A. Lymphocytes
• B. Histocytes
• C. Macrophages
• D. Undifferentiated mesenchymal

Explanation: Odontoblasts differentiate from ectomesenchymal cells of the dental papilla under the inductive influence of the inner enamel epithelium.

• A. Dental papilla
• B. Dental sac
• C. Odontoblasts
• D. Stellate reticulum

Explanation: The dental pulp develops from the ectomesenchymal dental papilla, which lies beneath the developing enamel organ.

• A. Cells of odontogenic layer
• B. Cells of dental follicle
• C. Cementoblasts
• D. Cells of the gingiva

Explanation: The dental follicle, or dental sac, is the ectomesenchymal tissue surrounding the developing tooth germ and gives rise to cementum…

• A. Enamel
• B. Cementum
• C. Dentin
• D. Bone

Explanation: Dentin is the first dental tissue to form, being deposited by odontoblasts before ameloblasts begin enamel formation.

• 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

Explanation: During primary tooth formation, dentin formation begins before enamel formation and proceeds at a faster rate.

• A. Pulpal end
• B. Cervical area
• C. Tooth bud stage
• D. Cusp tip

Explanation: Dentinogenesis begins where the first odontoblasts differentiate, at the cusp tips or incisal edges, and then progresses cervically.

• A. 1 year
• B. 2 years
• C. 3 years
• D. 4 years

Explanation: The dental lamina generally remains active up to about the fourth year of life, during which it initiates the developing permanent teeth…

• A. Formation of cementum
• B. Formation of periodontal ligament
• C. Determination of shape of crown and root
• D. Formation of pulp

Explanation: The ectodermal enamel organ, particularly the inner enamel epithelium, determines the shape of the crown and guides tooth morphogenesis.

• A. Hyaline layer of Hopewell-smill
• B. Stratum intermedium
• C. Stellate reticulum
• D. Outer and inner enamel epithelium

Explanation: Hertwig's epithelial root sheath is formed by the cervical loop, where the inner and outer enamel epithelia meet and extend apically.

• A. Rests of serrae
• B. Enamel pearls
• C. Epithelial rests of Malassez
• D. All of the above

Explanation: Rests of Serres are remnants of the dental lamina that persist in the gingiva after the lamina breaks down.

• A. Defects in cementogenesis
• B. Dividing epithelial bridges
• C. Adherent epithelial rests
• D. Break in Hertwig's root sheath

Explanation: Accessory canals form when Hertwig's epithelial root sheath is interrupted or develops gaps, allowing the dental papilla to contact the…

• A. Initiation
• B. Differentiation
• C. Apposition
• D. Calcification

Explanation: A supernumerary tooth results from abnormal initiation, such as hyperactivity or splitting of the dental lamina, producing an additional…

• A. Dental papilla
• B. Dental Sac
• C. Reduced enamel organ
• D. Dental pulp

Explanation: The enamel organ has no blood vessels, so ameloblasts receive nutrients mainly by diffusion from vessels in the surrounding dental sac…

• A. Stellate reticulum
• B. Dental lamina
• C. Successional lamina
• D. Neutral ectodermal cells

Explanation: The successional lamina is an extension of the dental lamina that gives rise to the permanent successors of deciduous teeth.