The development of the dental pulp commences__________?
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Answer: B. 8th week of IU
Explanation
Histological studies confirm that dental pulp differentiation officially commences around the eighth week of intrauterine life. At this developmental time point, ectomesenchymal cells condense within the dental papilla beneath the enamel organ. These condensed cells rapidly differentiate into specialized odontoblasts and the vascularized core of the future pulp. Intrauterine development of human dentition begins very early in the embryonic and fetal periods. The dental papilla gives rise to both the dentin-producing cells and the soft connective tissue of the pulp. Timing of odontogenesis is tightly regulated by complex molecular signals exchanged between epithelium and mesenchyme.
Knowing embryonic timelines helps clinicians understand when systemic insults might disrupt normal tooth formation. Teratogenic exposure during the eighth week can potentially lead to severe structural dental anomalies. Embryological milestones provide a baseline for studying congenital tooth disorders and developmental delays. The sixth week of intrauterine life represents the very beginning of dental lamina formation, not pulp development. The tenth week corresponds to later cap and bell stages rather than initial pulp differentiation. The eighteenth week occurs deep into the mineralization phase when crown hard tissues are actively forming.
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Answer: C. Cancellous bone covered by thin layer of compact bone
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Answer: D. Lipase
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Answer: D. Occlusal surface
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Answer: B. Its formative cells are lost once it is completely formed
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