vitrodentin

anatomy

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July 14, 2026

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Vitrodentin is a type of dentin known for its extreme hardness. In nonmammalian vertebrates, the tooth crown is covered with vitrodentin instead of enamel. This compound is related to dentin but is harder than dentin while remaining somewhat softer than enamel. Unlike mammals, nonmammalian vertebrates (except crocodiles) have teeth covered by vitrodentin, which lacks roots and periodontal membranes.123

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chondrichthyan
Distinguishing features
…of hard enamel-like substances called vitrodentine. The scales covering the skin do not grow throughout life, as they do in bony fishes, but have a limited size; new scales form between existing ones as the body grows. Certain other structures, such as the teeth edging the rostrum (beak) of sawfishes…
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…of hard enamel-like substances called vitrodentine. The scales covering the skin do not grow throughout life, as they do in bony fishes, but have a limited size; new scales form between existing ones as the body grows. Certain other structures, such as the teeth edging the rostrum (beak) of sawfishes…
Read More

dentin
…crown is covered instead with vitrodentin, a compound related to dentin, which is harder than dentin but somewhat softer than enamel.
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…crown is covered instead with vitrodentin, a compound related to dentin, which is harder than dentin but somewhat softer than enamel.
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