Dentinal nerve cell membrane

Dentinal nerve cell membranes are the lipid bilayers of sensory neurons, specifically A-delta and C-fibers, that innervate the dental pulp and dentinal tubules (PubMed, PMID: 8055379). These membranes play a critical role in dental nociception by hosting various ion channels, such as voltage-gated sodium channels and transient receptor potential (TRP) channels, which respond to thermal, mechanical, or chemical stimuli (Journal of Endodontics, 2017). In the treatment of dentin hypersensitivity, the membrane is the site where potassium ions from desensitizing toothpastes accumulate to induce a state of sustained depolarization (Cochrane Database Syst Rev, 2006). This process effectively numbs the nerve by preventing the firing of action potentials and the subsequent transmission of pain signals. Additionally, local anesthetics like lidocaine target these membranes to bind and inhibit sodium channels, blocking the transmission of pain signals during dental procedures (StatPearls, 2023). Understanding the physiology of these membranes is essential for developing treatments for conditions like pulpitis and hypersensitivity, where the hydrodynamic movement of fluid in dentinal tubules triggers nerve excitation (Journal of Dental Research, 1963). Although the membrane itself is a structural entity, its functional components are the primary focus of dental pharmacology.

Other names

Pulpal nerve membraneIntradental nerve membraneA-delta fiber membraneC-fiber membraneDentinal tubule nerve membrane

Depolarization of the nerve membrane via potassium ion accumulation and blockade of voltage-gated sodium channels.