Cleansable dentin

# Slow caries leading to formation of black, hard, cleansable dentin is called as:
 A. Reparative dentin
 B. Secondary dentin
 C. Eburnated dentin
 D. Arrested dentin

The correct answer is C. Eburnated Dentin.

An arrested dentinal lesion typically is 'open', dark and hard, and this dentin is termed as sclerotic or eburnated dentin.

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