Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Dentin is the calcified tissue beneath the enamel of a tooth, providing structural support and protection to the pulp. It contains microscopic tubules that can transmit sensations and nutrients.
5 Must Know Facts For Your Next Test
Dentin is produced by cells called odontoblasts located at the border of the pulp.
The porous nature of dentin allows it to be a conduit for bacteria if exposed due to enamel erosion or cavities.
Dentin contains tiny tubules that can carry sensations such as pain when exposed.
Unlike enamel, dentin has the ability to regenerate and repair itself to a certain extent.
Dentin is softer than enamel but harder than bone, making it susceptible to decay once exposed.
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Related terms
Enamel: The hard, outermost layer of a tooth that provides protection against decay.
Odontoblasts: Cells responsible for the formation and maintenance of dentin.
Pulp: The innermost part of the tooth containing nerves and blood vessels.