The site for permanent tooth development originates from remnants of which structure?

• A. Remnants of the dental lamina
• B. Dental papilla
• C. Vestibular lamina
• D. Enamel organ

Answer: (A)

Permanent tooth development begins from remnants of the dental lamina. The dental lamina is the embryonic epithelium that creates the initial tooth buds. After the primary (deciduous) teeth form, most of this lamina regresses, but portions persist as the successional dental lamina. These remnants give rise to the permanent tooth buds for most teeth, so the site of origin is the dental lamina remnants. The dental papilla forms dentin and pulp, the vestibular lamina contributes to the future vestibule, and the enamel organ is the enamel-forming part that ultimately derives from the dental lamina—but the initiating source for permanent teeth is these dental lamina remnants.