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10.06.2015

Compressed mineral nanoparticles make teeth tougher

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Scientists reveal how natural mineralized materials work

An interdisciplinary team of scientists at the CharitéUniversitätsmedizin Berlin has succeeded in unraveling an inbuilt crack-stopping mechanism acting in dentin, the bone-like material that comprises the bulk of human teeth. Contrary to normal bone tissue, cracks and damage occurring in dentin do not heal by tissue replacement or remodeling. So how do teeth survive decades of harsh mechanical wear and tear in the mouth? Scientists have now revealed for the first time: internal stress in denin act to prevent damage by stopping cracks from propagating into the tooth insides. These findings have now been published in the materials-science journal Nano Letters*.

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