Treatment using Rapid Maxillary Expansion (RME) was first reported by Angell in 1860.Then,animal experiments and clinical observation were done in the following one hundred years with focus on treatment and retention after RME.

• 1860年Angell首先报道应用上颌快速扩弓(rapid maxillary expansion,RME)矫治此类错(牙合)。