Objective:To investigate the growth rotation of the mandibular in three facial types.
目的：纵向比较不同颅面型青少年下颌骨生长旋转。
Objective: To study the difference of upper airway form and hyoid position of the children with different vertical facial types in mixed dentition.
目的：比较替牙期不同垂直骨面型儿童上气道形态和舌骨位置的差异，为临床诊疗和颅面部生长发育的研究提供一定的参考依据。
Conclusion: in mixed dentition, there had statistical differences in upper airway form and hyoid position in children with different vertical facial types.
结论：替牙期不同垂直骨面型儿童上气道形态，舌骨位置存在差异。
Conclusion: in mixed dentition, there had statistical differences in upper airway form and hyoid position in children with different vertical facial types.
结论：替牙期不同垂直骨面型儿童上气道形态，舌骨位置存在差异。
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