Department of Orthodontics and Dentofacial Orthopaedics, Adhiparasakthi Dental College & Hospital, Melmaruvathur, Tamil Nadu, India, e-mail:
J Contemp Dent Pract. 2023 Apr 1;24(4):228-237. doi: 10.5005/jp-journals-10024-3484.
To evaluate the effects of two preprocedural mouthrinses, hydrogen peroxide (HO) and povidone iodine (PI) on the surface characteristics and mechanical properties of nickel-titanium (NiTi) and stainless steel (SS) orthodontic archwires.
Five wire specimens were used, each (0.016" NiTi, 0.016" SS wires, 0.016 × 0.022" NiTi and 0.016 × 0.022" SS wires) specimen was cut into 30 mm lengths and immersed in 9% of artificial saliva and 91% of two preprocedural mouthrinse solutions: 1.5% hydrogen peroxide mouthwash, 0.2% povidone-iodine mouthwash, and distilled water (control group) for 90 minutes and incubated at 37°C. The wire specimens were then subjected to a three-point bending test for mechanical testing and viewed under a scanning electron microscope (SEM) to evaluate their surface characteristics. The collected data were analyzed using one-way analysis of variance (ANOVA) and Bonferroni post hoc test.
The results showed a significant increase in the flexural modulus (E) of Nitinol wires in povidone-iodine gargle ( < 0.05) and a significant increase in the E of stainless steel wires in hydrogen peroxide mouthwash ( < 0.05). Analysis using SEM showed varying qualitative surface changes in the form of corrosion, voids, and ridges on the wires after exposure to both the mouthwashes.
Though there were significant changes in the flexural modulus of archwires for both the mouthwashes, hydrogen peroxide did not show a significant difference in the E of wires at most of the deflection intervals when compared with the other two solutions, hence, could be used in orthodontic patients as an effective preprocedural mouthrinse.
Preprocedural mouthrinses can cause surface irregularities on the wires which in turn lead to an increase in friction at the bracket-wire interface, thereby disrupting effective tooth movement and extending the orthodontic treatment time.
评估两种术前漱口液（过氧化氢和聚维酮碘）对镍钛（NiTi）和不锈钢（SS）正畸弓丝表面特性和力学性能的影响。
使用 5 个弓丝样本，每个样本（0.016" NiTi、0.016" SS 弓丝、0.016×0.022" NiTi 和 0.016×0.022" SS 弓丝）均切成 30mm 长，并浸入 9%人工唾液和两种术前漱口液中 91%：1.5%过氧化氢漱口水、0.2%聚维酮碘漱口水和蒸馏水（对照组）90 分钟，在 37°C 下孵育。然后对弓丝样本进行三点弯曲测试进行力学测试，并在扫描电子显微镜（SEM）下观察其表面特性。收集的数据使用单因素方差分析（ANOVA）和 Bonferroni 事后检验进行分析。
结果表明，聚维酮碘漱口液可显著提高镍钛弓丝的弯曲弹性模量（E）（<0.05），而过氧化氢漱口水可显著提高不锈钢弓丝的 E（<0.05）。使用 SEM 分析表明，两种漱口液处理后，弓丝表面均出现腐蚀、空隙和脊等不同程度的定性表面变化。
尽管两种漱口液都显著改变了弓丝的弯曲弹性模量，但与其他两种溶液相比，过氧化氢在大多数挠度间隔内对弓丝的 E 没有显著差异，因此可以作为一种有效的术前漱口液用于正畸患者。
术前漱口会导致弓丝表面出现不规则，进而导致托槽-弓丝界面的摩擦力增加，从而破坏有效牙齿移动，并延长正畸治疗时间。
