Liao Yixuan, Phan ThiThuHa, Yu Qingsong
Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO 65211, USA.
Department of Chemical and Biomedical Engineering, University of Missouri, Columbia, MO 65211, USA.
Materials (Basel). 2025 Jul 24;18(15):3482. doi: 10.3390/ma18153482.
Zirconia restoration debonding is one of the common issues in its dental applications because of its dense and chemically inert structure that is difficult to bond to. In this study, plasma treatment of zirconia was performed to improve its bond strength and longevity with dental resin cement. Sandblasted zirconia specimens were treated using argon cold atmospheric plasmas (CAPs), followed by applying a thin layer of 10-MDP primer, dental resin cement with light curing. Micro-shear bond strength (µSBS) test results showed that 300 s of CAP treatment significantly increased the initial µSBS to 38.3 ± 5.6 MPa as compared with the 21.6 ± 7.9 MPa without CAP treatment. After 30 days of storage in 37 °C deionized (DI) water, CAP-treated zirconia specimens had 191.2% higher bond strength than the bonded specimens without plasma treatment. After 1000 cycles of thermal cycling (TC) between 5 °C and 55 °C, the CAP-treated zirconia specimens gave 30.5% higher bond strength than the bonded specimens without plasma treatment. Surface-water contact angle measurements indicated that the zirconia surface became much more hydrophilic but showed rapid hydrophobic recovery within the first hour of CAP treatment, indicating the importance of promptly applying the primer after the plasma treatment. These findings suggest that the argon CAP technique is effective in the surface preparation of zirconia for enhancing bond strength and longevity with dental cement.
由于氧化锆结构致密且化学性质惰性，难以与其他物质结合，因此在牙科应用中，氧化锆修复体脱粘是常见问题之一。在本研究中，对氧化锆进行了等离子体处理，以提高其与牙科树脂水门汀的粘结强度和使用寿命。对喷砂处理后的氧化锆试样使用氩冷大气等离子体（CAPs）进行处理，随后涂覆一层10-MDP底漆，再用光固化牙科树脂水门汀。微剪切粘结强度（µSBS）测试结果表明，与未进行CAP处理时的21.6±7.9MPa相比，300秒的CAP处理显著提高了初始µSBS至38.3±5.6MPa。在37℃去离子（DI）水中储存30天后，经CAP处理的氧化锆试样的粘结强度比未进行等离子体处理的粘结试样高191.2%。在5℃至55℃之间进行1000次热循环（TC）后，经CAP处理的氧化锆试样的粘结强度比未进行等离子体处理的粘结试样高30.5%。表面水接触角测量表明，氧化锆表面变得更加亲水，但在CAP处理的第一小时内显示出快速的疏水恢复，这表明在等离子体处理后应及时涂覆底漆。这些发现表明，氩CAP技术在氧化锆的表面处理中对于提高与牙科水门汀的粘结强度和使用寿命是有效的。
