Free Histology of Tooth Development MCQs with Answers

• A. Bud stage
• B. Advanced bell stage
• C. Bell stage
• D. Cap stage

Explanation: During the cap stage, the enamel organ becomes organized into outer and inner enamel epithelium, enclosing the stellate reticulum.

• A. Stellate reticulum
• B. Outer enamel epithelium
• C. Inner enamel epithelium
• D. Stratum intermedium

Explanation: The stellate reticulum contains albumin-rich extracellular fluid, which helps maintain its hydrated, star-shaped cell network.

• A. Bud stage
• B. Cap stage
• C. Bell stage
• D. Advanced bell stage

Explanation: The membrana preformativa is the thin layer between the inner enamel epithelium and dental papilla, and it is identified in the bell stage…

• A. Hutchinson's incisor
• B. Osteodentin formation
• C. Anodontia
• D. Enamel hypoplasia

Explanation: During the apposition stage, ameloblasts and odontoblasts deposit the organic matrices of enamel and dentin; injury then produces a…

• A. Ectoderm, mosoderm
• B. Ectoderm
• C. Mesoderm
• D. Ectoderm and endoderm

Explanation: The tooth develops from oral ectoderm, which forms enamel, and neural-crest-derived ectomesenchyme, traditionally described in basic texts…

• A. Adolescent stage
• B. Embryonic stage
• C. 5-10 years
• D. None of the above

Explanation: The pulpal and periodontal tissue relationship begins during embryonic tooth development as the dental papilla, dental follicle, and…

• A. Cells of outer enamel epithelium
• B. Cells of inner enamel epithelium
• C. Cells of stellate reticulum
• D. Cells of stratum intermedium

Explanation: The inner enamel epithelium directly contacts the dental papilla and differentiates into ameloblasts, which produce enamel.

• A. Dental papilla
• B. Dental follicle
• C. Enamel Knot
• D. Inner enamel epithelium

Explanation: The enamel knot is a transient signaling center in the cap-stage enamel organ that regulates cusp pattern and shape.

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

Explanation: Dentin, cementum and pulp arise from ectomesenchymal components derived mainly from the dental papilla or follicle.

• A. Peg laterals
• B. Interglobular dentin
• C. Supernumerary tooth
• D. Microdontia

Explanation: Calcification defects disturb the mineralization pattern of dentin and can leave areas of interglobular dentin.

• A. Dental lamina
• B. Hertwig's root sheath
• C. Enamel organ
• D. All of the above

Explanation: The stellate reticulum is the star-shaped, fluid-rich cell layer within the enamel organ.

• A. Bell-bud-cap
• B. Cap-bell-bud
• C. Bell-cap-bud
• D. Bud-cap-bell

Explanation: The tooth germ develops sequentially through the bud, cap and bell stages.

• A. Histodifferentiation
• B. Morphodifferentiation
• C. Apposition
• D. Initiation

Explanation: Histodifferentiation determines the specialized functions of odontoblasts and ameloblasts; its disturbance can cause atypical dentin or…

• A. Dental sac
• B. Odontoblastic process
• C. Ree
• D. Dental Papilla

Explanation: Once the first enamel layer and dentin are present, ameloblasts receive nutrients indirectly from vessels of the dental sac through the…

• A. Enamel knot
• B. Enamel cord
• C. Enamel Cuticle
• D. Both A and B

Explanation: The enamel knot and enamel cord are temporary signalling and structural features of the enamel organ before enamel deposition.

• A. Vestibular lamina
• B. Successional lamina
• C. Dental lamina
• D. Basal lamina

Explanation: The lip furrow band is the vestibular lamina, an epithelial thickening that later contributes to formation of the oral vestibule.

• A. Amelogenisis imperfecta
• B. Oligodontia
• C. Enamel hypoplasia
• D. Dentinogenesis imperfecta

Explanation: Initiation and proliferation defects affect the number of developing tooth germs, producing conditions such as oligodontia.

• A. Gives rise to cementoblasts that produce cementum of the root
• B. Given rise to odontoblasts that lay down dentin of the root
• C. Moulds the shape of roots and stimulates differentiation of odontoblasts
• D. Remians as an essential constituents of the periodontal ligament

Explanation: Hertwig's epithelial root sheath determines root shape and induces adjacent dental papilla cells to differentiate into odontoblasts, which…

• A. Forebrain
• B. Rathke's pouch
• C. Odontoblasts
• D. Neural crest cells

Explanation: The dental lamina forms through epithelial-mesenchymal interaction initiated by signals from neural crest-derived ectomesenchyme.

• A. Epithelial diaphragm
• B. Cell rests of Malassez
• C. Toot bud division or bell stage
• D. None of the above

Explanation: In multirooted teeth, the epithelial diaphragm develops folds or extensions that divide the root region into separate root canals and…