Sufarnap Erliera, Harahap Kholidina Imanda, Adiana Ika Devi, Lim Davin, Lim Chatty, Christy Christy
Orthodontic Department, Faculty of Dentistry, Universitas Sumatera Utara, Medan, North Sumatera, 20155, Indonesia.
Department of Dental Material, Faculty of Dentistry, Universitas Sumatera Utara, Medan, North Sumatera Utara, 20155, Indonesia.
F1000Res. 2024 May 30;12:159. doi: 10.12688/f1000research.129043.3. eCollection 2023.
Copper (Cu), nickel (Ni), chromium (Cr) ion release, and surface topography change from the orthodontic wire are the initial processes of corrosion that may affect the mechanical properties of the archwire. In this study, we aim to evaluate the effect of CHX, NaF, and chitosan on the corrosion of CuNiTi wire nickel and copper ions released, surface roughness change, and archwire deflection.
Ninety samples of CuNiTi Tanzo™ archwires were divided into five groups according to their immersion solution: Artificial Saliva, CHX, NaF, CHX-NaF, and chitosan group. Each group was further divided into three subgroups (n=6) corresponding immersion time, two, four, and six weeks. The corrosion of the samples was analyzed with an atomic absorption spectrophotometer (AAS), scanning electron microscope (SEM), and universal testing machine (UTM).
The amount of nickel ion releases was increasing, but the copper ion releases were reduced by the time of observations. The highest nickel ion was released in the CHX-NaF group and the lowest in the chitosan group for six-week immersion. It also corresponded to the surface topography by SEM analysis which showed the most extended cracks and deep pits in the CHX-NaF group and a smoother surface in the chitosan group. Copper ion release showed the highest ion release in the NaF group and the lowest release in the chitosan group. The unloading force of CuNiTi archwire deflection remains the same at week two and week four for all mouthwashes.
The use of mouthwashes that contained CHX, NaF, and chitosan could further alter the passive layer and cause higher nickel and copper ion release and increased CuNiTi archwire surface structure porosity. But there is no distinction between mouthwashes to release the unloading force within two until four weeks.
正畸钢丝的铜（Cu）、镍（Ni）、铬（Cr）离子释放以及表面形貌变化是腐蚀的初始过程，可能会影响弓丝的力学性能。在本研究中，我们旨在评估洗必泰（CHX）、氟化钠（NaF）和壳聚糖对CuNiTi丝腐蚀、镍和铜离子释放、表面粗糙度变化以及弓丝挠度的影响。
将90根CuNiTi Tanzo™弓丝样本根据其浸泡溶液分为五组：人工唾液、CHX、NaF、CHX-NaF和壳聚糖组。每组再根据浸泡时间进一步分为三个亚组（n = 6），分别为两周、四周和六周。用原子吸收分光光度计（AAS）、扫描电子显微镜（SEM）和万能试验机（UTM）分析样本的腐蚀情况。
观察期内镍离子释放量增加，但铜离子释放量减少。六周浸泡后，CHX-NaF组释放的镍离子最多，壳聚糖组最少。这也与SEM分析的表面形貌相符，CHX-NaF组显示出最长的裂纹和深坑，壳聚糖组表面更光滑。铜离子释放在NaF组中最高，在壳聚糖组中最低。所有漱口水在第二周和第四周时，CuNiTi弓丝挠度的卸载力保持不变。
使用含有CHX、NaF和壳聚糖的漱口水会进一步改变钝化层，导致更高的镍和铜离子释放，并增加CuNiTi弓丝表面结构孔隙率。但在两周至四周内，不同漱口水在释放卸载力方面没有差异。
