One group was corrected with RME and the other was corrected with RME combined with vertical chin cap traction.

• 结果两组中,上颌相对于颅底前移、鼻底宽度、尖牙宽度、上颌第一前磨牙间宽度、上颌磨牙宽度和覆盖都增加,上颌磨牙颊向倾斜。