Dentin

Dentin, located beneath the enamel and cementum, forms the bulk of the tooth structure and provides support and insulation to the pulp. It is not as hard as enamel but is still durable and resilient. Dentin contains microscopic tubules that transmit sensations from the tooth surface to the nerves in the pulp, making it sensitive to temperature, pressure, and pain. When enamel is compromised, such as through decay or abrasion, dentin becomes more susceptible to damage and can lead to tooth sensitivity and pain. Dentin is continuously produced throughout life by specialized cells called odontoblasts, helping to repair and maintain the integrity of the tooth structure.