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作者对拔牙和不拔牙矫治病例的侧貌变化进行了对比研究,根据以下标准确定面部是否平衡、美观:①面部三等分,即发际至眉间,眉间至鼻底,鼻底至颏下,此三距离应基本相等。②上唇曲线,即鼻底至上红唇缘之间应有一向内的弧形曲线。③下唇位置,下唇位于上唇稍后方或二者平齐。④颏突度,颏部应圆滑且有一定突度。⑤Z线,即软组织颏前点至最前突的唇的切线应通过鼻孔前缘鼻小柱中点的位置。研究对象包括108名拔除前磨牙矫治患者和62名非拔牙矫治患者。拔牙
The author of the tooth extraction and non-extraction treatment of the cases of the profile changes were compared, according to the following criteria to determine whether the face is balanced, beautiful: ① face trisection, that is, hair to the eyebrow, eyebrows to nose, nose to chin Under this three distance should be basically equal. ② upper lip curve, that is, between the top of the nose and red lips should have an inward curved curve. ③ lower lip position, the lower lip is located in the upper lip slightly later or both flush. Â'¡ genitial chin, chin should be smooth and have a certain degree of disruption. ⑤ Z line, that is, soft tissue from the anterior chin point to the forefront of the lip of the tangent should be through the front nose columella midpoint position. The subjects included 108 premolar patients and 62 non-maxillary patients. Tooth extraction