首页|A Biomimetic Tooth Replicate That Is Hard,Damage-Tolerant,and Self-Healable

A Biomimetic Tooth Replicate That Is Hard,Damage-Tolerant,and Self-Healable

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Hard materials typically lack the mechanism of ener-gy dissipation and cannot self-heal.Nature addresses this challenge by creating multiscale interfaces be-tween high-contrast materials,namely minerals and biopolymers.Inspired by the enamel-dentin junction in nature,an enamel-like crown consisting of β-FeOOH nanocolumns is interdigitated with a flexible self-healing layer.The iron oxide top layer has excep-tionally high modulus and hardness,which is more resistant to cyclic deformation than the bottom layer.The latter however provides an additional pathway for viscous and plastic energy dissipation and enables self-healing by allowing upward polymer diffusion to seal the damage.Picture-frame crack patterns were observed under large loading condi-tions using microindentation,which localizes the damage at the indentation site.The bending proper-ties can be optimized by varying the thickness of the bottom layer,and the crack induced by bending can be effectively captured at the interface without any delamination.The biomimetic tooth replicate is high-ly adhesive to a ceramic surface and shows an obvi-ous inhibition effect against Streptococcus mutans,a significant contributor to tooth decay.Combined with ultralow thermal diffusivity,this has great po-tential as dental material.Learning from nature,our work thus provides a powerful pathway to broaden-ing the scope of synthetic materials for dental repli-cates.

biomimeticsmolecular assemblyenamel-dentin interfacemechanical propertiesself-healing

Ying Yan、Kai Niu、Wenbo Zhang、Weiming Sun、Yue Jiang、Zhonghao Jiang、Lijuan Zhao、Ming Yang、Baosheng Li、Ying Hou、Guangshe Li、Shouhua Feng

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State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,Jilin University,Changchun 130012

Depart-ment of Otorhinolaryngology Head and Neck Surgery,The First Hospital of Jilin University,Changchun 130021

Key Laboratory of Automobile Materials,College of Materials Science and Engineering,Jilin University,Changchun 130025

Key Laboratory of Bionic Engineering of Ministry of Education,College of Biological and Agricultural Engineering,Jilin University,Changchun 130022

Department of Molecular Biology,College of Basic Medical Sciences,Jilin University,Changchun 130021

Department of Dental Implantology,Hospital of Stomatology,Jilin University,Changchun 130021

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国家自然科学基金国家自然科学基金

2207107522090044

2023

10.31635/ccschem.022.202101648

中国化学会会刊(英文)

中国化学会会刊(英文)

CSCD
ISSN：
年,卷(期)：2023.5(1)
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