Sensory dental nerve fibers

Sensory dental nerve fibers are the primary afferent neurons that provide innervation to the dental pulp and dentin, primarily originating from the trigeminal ganglion (StatPearls, 2023). These fibers are classified into myelinated A-delta fibers, which transmit sharp, fast pain, and unmyelinated C-fibers, which are responsible for slow, dull, aching pain (Journal of Endodontics, 2017). Their primary biological role is nociception, serving as a protective mechanism to alert the body to thermal, mechanical, or chemical stimuli that could cause tissue damage (NIH, 2022). In conditions such as pulpitis or dentin hypersensitivity, these fibers undergo peripheral sensitization, often involving the upregulation of specific ion channels like Nav1.7 and TRPV1 (PubMed, 2020). Pharmacological management of dental pain typically targets these fibers using local anesthetics, which inhibit voltage-gated sodium channels to block the conduction of action potentials (PubChem, 2024). Research into these fibers is essential for developing more effective treatments for acute and chronic orofacial pain.

Other names

Dental pulp nervesIntradental nervesPulpal afferentsTrigeminal dental axonsDental pulp sensory innervation

Sodium channel blockade; TRPV1 receptor modulation; Inhibition of neurotransmitter release