鼻唇角只能反映上唇本身的形态变化，不能直接反映面部侧貌的特征。
Nasolabial angle only reflected change of upper lip, but could not reflect characters of facial profile.
上颌骨向前发育，下颌骨后退，下颌平面角无明显增大，上下颌骨间不调改善，鼻唇角减小，面型明显改善。
Maxilla grew forward, mandible moved back. The mandibular plane Angle had no significant change. The discrepancy between maxilla and mandible were improved.
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