双曲唇弓是活动矫治器上重要的组成部分之一,我们用简便方法制作双曲唇弓,经过三年多的技工实践,认为它制作速度快,质量高。其方法介绍如下: 一、在石膏模型上用红兰笔画出双曲唇弓准确设计线(图1)。 Hyperbolic lip bow is one of the most important components of the active appliance. We make the double lip with a simple method. After more than three years of practice, we think it is fast and of high quality. The method is described as follows: First, in the plaster model with red blue strokes lip stroke accurate design line (Figure 1).