Journal
COLLOIDS AND SURFACES B-BIOINTERFACES
Volume 212, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfb.2022.112336
Keywords
Abalone nacre; Water-soluble organic matrix; Ultrasound-assisted water extraction; Enamel-like hydroxyapatite; Enamel remineralization
Funding
- Physical-Chemical Materials Analytical & Testing Center of Shandong University at Weihai
- Science Fund of Shandong Laboratory of Advanced Materials and Green Manufacturing (Yantai) [AMGM2021F02]
- Young Scholars Program of Shandong University [2018WLJH79]
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology)
- Open Project Fund for Hubei Key Laboratory of Oral and Maxillofacial Development and Regeneration [2021kqhm003]
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The water-soluble organic matrix (WSM) derived from abalone nacre was successfully isolated using an ultrasonic-assisted water extraction (UWE) strategy. The WSM was able to induce the growth of enamel-like hydroxyapatite crystals for the remineralization of damaged enamel. The repaired enamel exhibited similar mechanical properties to native enamel.
Reconstructing enamel-like hydroxyapatite structures on damaged teeth remains a great challenge in the materials science and dentistry due to its highly ordered hierarchical microstructure. Inspired by the mineralization of mollusk nacre in nature, abalone nacre water-soluble organic matrix (WSM) was isolated successfully though an ultrasonic-assisted water extraction (UWE) strategy with nondestructive activity and high-quality extraction for simulating the process of tooth hard tissue mineralization. Results showed that the UWE strategy significantly increased the protein yield from 7.60% to 9.60% and improved the polysaccharide yield from 2.59% to 3.34%, respectively, indicating its excellent extraction efficiency of WSM. Noteworthily, the smallest averaged particle size (-155 nm) of WSM were obtained at an ultrasound time of 6 h, whereas the highest absolute values (- -32 mV) of zeta potential was produced. Moreover, it was proved that WSM could induce the growth of enamel-like hydroxyapatite crystals to further facilitate biomimetic remineralization of the demineralized enamel and restore its continuous and smooth surface structure in vitro. Besides, the hardness (4.37 +/- 0.07 GPa) and modulus of elasticity (84.80 +/- 1.49 GPa) of the WSM-repaired enamel was similar to that of native enamel, indicating superior mechanical properties after repair. Herein, it provides a promising green, efficient strategy for the remineralization of damaged enamel and high value utilization of waste abalone shells.
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