Dental nerves enter the tooth from which opening to supply pulpal innervation?

• A. Apical foramen
• B. Dentinal tubules
• C. Mental foramen
• D. Foramen ovale

Answer: (A)

Nervous supply to the tooth pulp enters through the apical foramen at the root tip, where the neurovascular bundle from the surrounding tissues piercing the apex reaches the pulp. Dentinal tubules are tiny channels within dentin that can transmit sensation to nerves but are not the entry route for nerves into the pulp. The mental foramen is a mandibular feature that transmits the mental nerve to the lower face, not a dental pulp entry point, and the foramen ovale is a skull opening for the trigeminal nerve, unrelated to how pulpal innervation enters a tooth. Therefore, the apical foramen is the correct entry point for pulpal nerves.