垂直生长型安氏Ⅱ类1分类拔牙病例矫治前后软组织的改变
수직생장형안씨Ⅱ류1분류발아병례교치전후연조직적개변
The soft tissue change of Angle's Class Ⅱ division 1 malocclusion patients with vertical growth pattern after tooth extraction orthodontic treatment
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