Department of Orthodontics and Dentofacial Orthopaedics, Purvanchal Institute of Dental Sciences, GIDA, Gorakhpur, Uttar Pradesh, India, Phone: +91 9455752296, e-mail:
Department of Prosthodontics, Crown and Bridge and Implantology, Vydehi Institute of Dental Sciences and Research Hospital, Bengaluru, Karnataka, India.
J Contemp Dent Pract. 2020 Dec 1;21(12):1337-1341.
The present study aimed to assess the effect of fluoridated and nonfluoridated mouth ri nses on resistance to friction between orthodontic bracket and archwire.
This study comprises 60 premolar stainless steel (SS) brackets with 0.022 inches slot size. The 0.019 × 0.025 dimensions SS archwires were cut into 5 cm long specimens. They were grouped into three main categories, group I: artificial saliva (control solution), group II: Aloe Dent mouthwash (ALO), and group III: 0.05% sodium fluoride mouthwash. The specimens from each group were either immersed in the test solution or in the control solution for 10 hours. Later, the specimens were transferred to an incubator maintained at 37°C. Post 10 hours, the specimens were immersed for 30 minutes in distilled water. A scanning electron microscope was used to study the surface morphology and a universal testing machine was used to measure the frictional resistance.
The distribution of normality for three study groups' recorded data was checked using Shapiro-Wilk test. The highest frictional resistance (1.94 ± 0.02) was demonstrated by specimens immersed in 0.05% sodium fluoride mouthwash than those immersed in Aloe Dent mouthwash (1.28 ± 0.66) and artificial saliva (1.10 ± 0.32). The difference found between the groups by an analysis of covariance was statistically significant. The highest surface roughness (22.30 ± 0.12) was revealed by specimens immersed in 0.05% sodium fluoride mouthwash than those immersed in Aloe Dent mouthwash (18.28 ± 0.26) and artificial saliva (15.86 ± 0.42). A statistically significant difference between the groups was shown by an analysis of covariance.
After considering the drawbacks of this study, we conclude that specimens immersed in Aloe Dent mouthwash demonstrated less frictional resistance and surface roughness when compared to those immersed in 0.05% sodium fluoride mouthwash.
During sliding mechanism, the frictional resistance between orthodontic archwire and brackets imposes problems, such as lessening the applied force and movement of tooth, and also results in anchorage loss. So, orthodontists should always take care while prescribing mouthwashes to reduce their effects on the friction.
本研究旨在评估含氟和非含氟漱口水对正畸托槽和弓丝之间摩擦力的影响。
本研究包括 60 个尺寸为 0.022 英寸的不锈钢（SS）前磨牙托槽。将 0.019×0.025 尺寸的 SS 弓丝切成 5 厘米长的标本。它们被分为三个主要类别，第 I 组：人工唾液（对照溶液），第 II 组：Aloe Dent 漱口水（ALO），第 III 组：0.05%氟化钠漱口水。每组的标本要么浸泡在测试溶液中，要么浸泡在对照溶液中 10 小时。之后，将标本转移到保持在 37°C 的孵育箱中。10 小时后，将标本在蒸馏水中浸泡 30 分钟。使用扫描电子显微镜研究表面形态，使用万能试验机测量摩擦阻力。
使用 Shapiro-Wilk 检验检查了三组研究记录数据的正态分布。浸泡在 0.05%氟化钠漱口水的标本表现出最高的摩擦力（1.94±0.02），其次是浸泡在 Aloe Dent 漱口水（1.28±0.66）和人工唾液（1.10±0.32）的标本。协方差分析显示，各组之间的差异具有统计学意义。浸泡在 0.05%氟化钠漱口水的标本表面粗糙度最高（22.30±0.12），其次是浸泡在 Aloe Dent 漱口水（18.28±0.26）和人工唾液（15.86±0.42）的标本。协方差分析显示，各组之间存在统计学差异。
考虑到本研究的局限性，我们得出的结论是，与浸泡在 0.05%氟化钠漱口水的标本相比，浸泡在 Aloe Dent 漱口水的标本表现出较低的摩擦力和表面粗糙度。
在滑动机制中，正畸弓丝和托槽之间的摩擦力会带来问题，例如减少施加的力和牙齿的移动，还会导致支抗丧失。因此，正畸医生在开漱口药水时应始终注意减少其对摩擦力的影响。
