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Hierarchically mimicking outer tooth enamel for restorative mechanical compatibility

Author

Listed:
  • Junfeng Lu

    (Beihang University)

  • Jingjing Deng

    (Peking University School and Hospital of Stomatology)

  • Yan Wei

    (Peking University School and Hospital of Stomatology)

  • Xiuyi Yang

    (Beihang University)

  • Hewei Zhao

    (Beihang University)

  • Qihan Zhao

    (Beihang University)

  • Shaojia Liu

    (Beihang University)

  • Fengshi Li

    (Beihang University)

  • Yangbei Li

    (Beihang University)

  • Xuliang Deng

    (Peking University School and Hospital of Stomatology)

  • Lei Jiang

    (Beihang University
    Chinese Academy of Sciences)

  • Lin Guo

    (Beihang University)

Abstract

Tooth enamel, and especially the outer tooth enamel, is a load-resistant shell that benefits mastication but is easily damaged, driving the need for enamel-restorative materials with comparable properties to restore the mastication function and protect the teeth. Synthesizing an enamel analog that mimics the components and hierarchical structure of natural tooth enamel is a promising way to achieve these comparable mechanical properties, but it is still challenging to realize. Herein, we fabricate a hierarchical enamel analog with comparable stiffness, hardness, and viscoelasticity as natural enamel by incorporating three hierarchies of outer tooth enamel based on hierarchical assembly of enamel-like hydroxyapatite hybrid nanowires with polyvinyl alcohol as a matrix. This enamel analog possesses enamel-similar inorganic components and a nanowire-microbundle-macroarray hierarchical structure. It exhibits toughness of 19.80 MPa m1/2, which is 3.4 times higher than natural tooth enamel, giving it long-term fatigue durability. This hierarchical design is promising for scalable production of enamel-restorative materials and for optimizing the mechanical performance of engineering composites.

Suggested Citation

  • Junfeng Lu & Jingjing Deng & Yan Wei & Xiuyi Yang & Hewei Zhao & Qihan Zhao & Shaojia Liu & Fengshi Li & Yangbei Li & Xuliang Deng & Lei Jiang & Lin Guo, 2024. "Hierarchically mimicking outer tooth enamel for restorative mechanical compatibility," Nature Communications, Nature, vol. 15(1), pages 1-16, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-54576-5
    DOI: 10.1038/s41467-024-54576-5
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    References listed on IDEAS

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