Aghili Hossein, Yassaei Sogra, Eslami Farzaneh
Department of Orthodontics, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Department of Orthodontics, Dental Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
Dent Res J (Isfahan). 2017 Jul-Aug;14(4):252-259. doi: 10.4103/1735-3327.211629.
The aim of this study was to evaluate and compare the changes in the mechanical properties and surface morphology of different orthodontic wires after immersion in three mouthwash solutions.
In this study, five specimens of each of 0.016 inch nickel titanium (NiTi), coated NiTi, and stainless steel orthodontic wires were selected. The specimens were immersed in 0.05% sodium fluoride (NaF), 0.2% chlorhexidine, extract, and distilled water (control) for 1.5 h at 37°C. After immersion, loading and unloading forces at 0.5 mm intervals and the elastic modulus (E) of the wires were measured using a three-point bending test. Surface changes were observed with a scanning electron microscope (SEM). Two-way analysis of variance and Bonferroni tests were used to compare the properties of the wires. The level of significance was set at 0.05.
Statistically significant changes in loading and unloading forces and E of the orthodontic wires were observed after immersion in different mouthwash solutions ( < 0.05). A pairwise comparison showed a nonsignificant difference between the effect of different mouthwashes on the E of different types of wires ( > 0.05). SEM images showed surface changes in some types ofthe orthodontic wires.
The mouthwashes used in this study seemed to change the mechanical properties and surface quality of the orthodontic wires.
本研究的目的是评估和比较不同正畸钢丝在三种漱口液中浸泡后的力学性能和表面形态变化。
在本研究中，选取了0.016英寸镍钛（NiTi）、涂层NiTi和不锈钢正畸钢丝各五个样本。将样本在37°C下分别浸泡于0.05%氟化钠（NaF）、0.2%氯己定、提取物和蒸馏水（对照）中1.5小时。浸泡后，使用三点弯曲试验以0.5毫米的间隔测量钢丝的加载和卸载力以及弹性模量（E）。用扫描电子显微镜（SEM）观察表面变化。采用双向方差分析和Bonferroni检验比较钢丝的性能。显著性水平设定为0.05。
在不同漱口液中浸泡后，正畸钢丝的加载和卸载力以及E出现了统计学上的显著变化（<0.05）。两两比较显示，不同漱口液对不同类型钢丝E的影响之间无显著差异（>0.05）。SEM图像显示了某些类型正畸钢丝的表面变化。
本研究中使用的漱口液似乎改变了正畸钢丝的力学性能和表面质量。
