Likes Gustavo L, Novak Rafael L, Franceschini Vitor C Y, Surek Monica, Souza Wesley M, Cardoso Rodrigo P, Rodrigues Danieli C, Marino Cláudia E B
Mechanical Engineering Department, Federal University of Paraná, Curitiba, Brazil.
Mechanical Engineering Department, Federal University of Santa Catarina, Florianópolis, Brazil.
Mater Res (Sao Carlos). 2025;28. doi: 10.1590/1980-5373-mr-2024-0318. Epub 2025 Feb 28.
This study aims the applicability and efficacy of a new DC water plasma method at low temperature, for the sterilization of titanium contaminated samples and its effects on the surface oxide layer and morphological structure. The plasma treatment was carried out at a temperature of 60°C, for a predefined time of 10 minutes. Water vapor was generated from distilled water and polarized at -700 V during plasma-on period. Elemental analysis revealed that Ti surfaces showed a complete absence of organic and inorganic molecules (0% at detected /1% sensitivity) and complete bacteria elimination. Additionally, the oxygen content remained around 8% indicating a positive outcome for bioactivity titanium surface due to oxide presence. Initial results support that the water plasma system enables effective elimination of surface microorganisms while enhancing the natural oxide layer make up of titanium using a low temperature and water-based sterilization system that can be envisioned for clinical use.
本研究旨在探讨一种新型低温直流水电浆法对钛污染样本进行灭菌的适用性和有效性，以及该方法对表面氧化层和形态结构的影响。等离子体处理在60°C的温度下进行，预定时间为10分钟。在等离子体开启期间，蒸馏水产生水蒸气并在-700V下极化。元素分析表明，钛表面完全没有有机和无机分子（检测到的含量为0%/灵敏度为1%），并且细菌被完全清除。此外，氧含量保持在8%左右，这表明由于存在氧化物，钛表面的生物活性取得了积极成果。初步结果表明，水电浆系统能够有效消除表面微生物，同时使用低温和水基灭菌系统增强钛的天然氧化层组成，该系统有望用于临床。
