正畸临床对于牙列轻度拥挤的错(牙合)畸形一般多采用扩弓以增加骨量的方法来解决。而增加骨量的方法颇多,不少学者均进行过介绍。但对目前我们常用扩弓矫正器的详细机制缺乏全面的研究。本文的目的在于观察、测量、分析分裂簧扩展上颌弓的效果及机制,以期有助于更明确分裂簧的扩弓适应症以便进一个提高治疗效果。 Orthodontic clinical dentition slightly crowded misdiagnosis (malocclusion) deformity generally use more to expand the bone to increase the amount of bone to solve the method. There are many ways to increase bone mass, many scholars have been introduced. However, there is a lack of comprehensive research on the detailed mechanism of our current augmentation braces. The purpose of this article is to observe, measure, and analyze the effect and mechanism of splitting spring expanding maxillary arch, in order to help more clearly splitting spring expansion indications in order to further improve the therapeutic effect.