Department of Orthodontics, Sri Sankara Dental College, Trivandrum, Kerala, India.
Acta Biomater. 2011 Apr;7(4):1913-27. doi: 10.1016/j.actbio.2010.11.026. Epub 2010 Nov 24.
The present research was aimed at developing surface coatings on β titanium orthodontic archwires capable of protection against fluoride-induced corrosion. Cathodic arc physical vapor deposition PVD (CA-PVD) and magnetron sputtering were utilized to deposit thin films of titanium aluminium nitride (TiAlN) and tungsten carbide/carbon (WC/C) coatings on β titanium orthodontic archwires. Uncoated and coated specimens were immersed in a high fluoride ion concentration mouth rinse, following a specially designed cycle simulating daily use. All specimens thus obtained were subjected to critical evaluation of parameters such as electrochemical corrosion behaviour, surface analysis, mechanical testing, microstructure, element release, and toxicology. The results confirm previous research that β titanium archwires undergo a degradation process when in contact with fluoride mouth rinses. The study confirmed the superior nature of the TiAlN coating, evident as many fewer changes in properties after fluoride treatment when compared with the WC/C coating. Thus, coating with TiAlN is recommended in order to reduce the corrosive effects of fluorides on β titanium orthodontic archwires.
本研究旨在开发能够防止氟化物诱导腐蚀的β钛正畸弓丝表面涂层。采用阴极电弧物理气相沉积（CA-PVD）和磁控溅射在β钛正畸弓丝上沉积钛铝氮（TiAlN）和碳化钨/碳（WC/C）薄膜涂层。未涂层和涂层的样品在高氟离子浓度漱口液中浸泡，采用专门设计的循环模拟日常使用。对所有获得的样品进行电化学腐蚀行为、表面分析、机械测试、微观结构、元素释放和毒理学等参数的临界评价。结果证实了之前的研究，即β钛弓丝在接触氟化物漱口液时会经历降解过程。该研究证实了 TiAlN 涂层的优越性质，与 WC/C 涂层相比，在氟化物处理后，其性能变化明显较少。因此，建议使用 TiAlN 涂层以减少氟化物对β钛正畸弓丝的腐蚀性影响。
