预防方案及其对托槽摩擦力的影响。
Prophylaxis protocols and their impact on bracket friction force.
出版信息
Angle Orthod. 2019 Nov;89(6):883-888. doi: 10.2319/020119-72.1. Epub 2019 Jul 15.
OBJECTIVE
To evaluate the effect of two different prophylaxis protocols on the friction force in sliding mechanics during in vivo leveling and alignment.
MATERIALS AND METHODS
The sample comprised 48 hemi-arches divided into three groups according to the prophylactic protocol adopted. Group 1 consisted of patients undergoing prophylaxis with sodium bicarbonate, group 2 consisted of patients submitted to prophylaxis with glycine, and group 3 consisted of patients without prophylaxis, as a control. All patients received hygiene instructions and, with the exception of group 3, prophylaxis was performed monthly. After 10 months, the brackets were removed from the oral cavity and submitted to friction force tests and qualitative analysis by scanning electron microscopy. Analysis of variance followed by Tukey tests was performed for intergroup comparison regarding the friction force.
RESULTS
The experimental groups presented significantly smaller friction forces than the group without prophylaxis. Accordingly, qualitative analysis showed greater debris accumulation in the group without the prophylactic procedures.
CONCLUSIONS
Prophylactic blasting with sodium bicarbonate or glycine can significantly prevent an increase of the friction force during sliding mechanics.
目的
评估两种不同预防方案对体内排齐整平滑动机制中摩擦力的影响。
材料与方法
样本由 48 个半牙弓组成，根据所采用的预防方案分为三组。组 1 为采用碳酸氢钠预防的患者，组 2 为采用甘氨酸预防的患者，组 3 为未预防的患者作为对照组。所有患者均接受口腔卫生指导，除组 3 外，每月进行一次预防。10 个月后，将托槽从口腔中取出，进行摩擦力测试和扫描电子显微镜定性分析。采用方差分析和 Tukey 检验进行组间比较。
结果
实验组的摩擦力明显小于未预防组。因此，定性分析显示，无预防措施组的碎屑堆积更多。
结论
使用碳酸氢钠或甘氨酸进行预防性喷砂可以显著防止滑动机制中摩擦力的增加。
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