Material Hardness — NDEB AFK MCQ

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EasyDental MaterialsMaterial HardnessNDEB AFK

Which property describes the ability of a dental material to resist indentation?

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Correct answer: C — Hardness

Hardness is the resistance of a material to permanent surface indentation or penetration. In dentistry, it is measured using Knoop, Vickers, Brinell, or Rockwell hardness tests. Hardness correlates with wear resistance and abrasion resistance. Enamel has a Knoop hardness of approximately 343 KHN, while dentin is approximately 68 KHN.

Reference: Anusavice – Phillips' Science of Dental Materials, 13th ed., 2022