小学生单纯性牙龈炎患病率较高，软垢指数与其发生的关系密切，有效清除软垢可减少单纯性牙龈炎的发生。本文对试用一次性塑料弯车头前后，学生软垢指数变化的情况进行观察和分析，发现其对降低软垢指数和改善学生口腔卫生状况有促进作用。现报告如下。对象与方法选择平时开展 The prevalence of simple gingivitis in primary school students is relatively high, and the fouling index is closely related to its occurrence. Effective removal of soft dirt can reduce the incidence of simple gingivitis. In this paper, we observed and analyzed the change of students 'fouling index before and after the disposable plastic bending head, and found that it can promote the reduction of fouling index and the improvement of students' oral hygienic condition. The report is as follows. The choice of object and method is usually carried out