AI Article Synopsis
- Dentin provides strong support for enamel in teeth, enhancing their ability to cut and grind without easily failing.
- Advanced X-ray diffraction techniques uncover that tiny mineral particles within dentin are precompressed and their internal strains disappear when heated slightly.
- The study connects these mineral nanoparticles to damage patterns in dentin, highlighting a new mechanism for toughness linked to compression.
Article Abstract
The tough bulk of dentin in teeth supports enamel, creating cutting and grinding biostructures with superior failure resistance that is not fully understood. Synchrotron-based diffraction methods, utilizing micro- and nanofocused X-ray beams, reveal that the nm-sized mineral particles aligned with collagen are precompressed and that the residual strains vanish upon mild annealing. We show the link between the mineral nanoparticles and known damage propagation trajectories in dentin, suggesting a previously overlooked compression-mediated toughening mechanism.
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| http://dx.doi.org/10.1021/acs.nanolett.5b00143 | DOI Listing |
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