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<p>Lithium disilicate glass-ceramics are increasingly utilized in dental applications due to their exceptional optical and aesthetic properties. However, lithium disilicate glass-ceramics possess a mixed crystalline and amorphous structure with variable resistance to external corrosion. Exposure of lithium disilicate glass-ceramics to acidic conditions in the oral cavity leads to pore formation, and the risk of cracking increases with long-term wear. Herein, we employed atomic layer deposition to precisely coat the TiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> hybrid nanolayer on the surface of lithium disilicate glass-ceramics to enhance acid resistance and surface mechanical properties. The TiO<sub>2</sub> species play crucial roles in improving acid resistance, and the Al<sub>2</sub>O<sub>3</sub> species, atomically bonded to the TiO<sub>2</sub> species in the hybrid layer, promote interfacial interactions. Moreover, the TiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> hybrid nanolayer shows no cytotoxicity while maintaining the aesthetics of lithium disilicate glass-ceramic restorations, thus offering broad prospects for oral restoration applications.</p>

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Hybrid TiO2/Al2O3 nanolayer overcoating enhances dental lithium disilicate glass-ceramics acid resistance and surface mechanical properties

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月21日

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  • Xiaoxuan Zhang,
  • Bin Zhang,
  • Fanchun Meng,
  • Xiangyu Zhao,
  • Ruilin Liu,
  • Meixian Liu,
  • Huifei Li,
  • Yuan Zhang,
  • Feng Wu,
  • Jin Bai,
  • Zhuoqun Yan,
  • Xiuyun Ren,
  • Yong Qin,
  • Xing Wang

摘要

Lithium disilicate glass-ceramics are increasingly utilized in dental applications due to their exceptional optical and aesthetic properties. However, lithium disilicate glass-ceramics possess a mixed crystalline and amorphous structure with variable resistance to external corrosion. Exposure of lithium disilicate glass-ceramics to acidic conditions in the oral cavity leads to pore formation, and the risk of cracking increases with long-term wear. Herein, we employed atomic layer deposition to precisely coat the TiO2/Al2O3 hybrid nanolayer on the surface of lithium disilicate glass-ceramics to enhance acid resistance and surface mechanical properties. The TiO2 species play crucial roles in improving acid resistance, and the Al2O3 species, atomically bonded to the TiO2 species in the hybrid layer, promote interfacial interactions. Moreover, the TiO2/Al2O3 hybrid nanolayer shows no cytotoxicity while maintaining the aesthetics of lithium disilicate glass-ceramic restorations, thus offering broad prospects for oral restoration applications.