upper incisors 中文意思是什麼
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As early as 4 months, the first primary, or baby teeth, to erupt through the gums are the lower central incisors, followed closely by the upper central incisors
最早在4個月的時候，首先萌出的是下頜第一乳切牙，緊接著萌出的是上頜中切牙。 -
Result : the midfacial complex was displaced anteriorly, forward growth of mandible was restricted ; the mandible exhibited a downward and backward rotation ; an significant increase was showed on the lower facial height ; the class incisor relationship was corrected by anterior displacement of the upper incisors and posterior displacement of the lower incisors
結果：上頜向前移位改良生長量，下頜的向前生長受到抑制；下頜以髁突為中心向下、后旋轉，使下頜空間位置發生變化；下頜的順時針旋轉將造成面下1 3長度增大；上、下頜前牙發生牙性代償的掩飾作用。
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