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材料与方法 一、病例收集 20例前牙拥挤,间隙差5~±mm的错(牙合)畸形。其中男女各10例;10～14岁17例,18～23岁3例。平均年龄13.5岁。诊断:安氏Ⅰ类16例,Ⅱ类2例,Ⅲ类2例。毛氏分类:20例均以Ⅰ~1类为主,其中2例伴有Ⅱ~4,2例伴有Ⅱ~3。面颌无异常。矫治:上前牙拥挤集中单侧者拔除患侧4,轻度拥挤分散两侧前牙者,视原上中线偏移情况,酌情减某侧4。其中10例配合减4或一个下切牙。20例中14例使用活动矫正器矫治。平均疗程13.6月。
Materials and Methods First, the cases were collected 20 cases of anterior crowded crowded, gap 5 ~ ± mm of the wrong (occlusal) deformity. Including 10 males and 10 females; 10 to 14 years in 17 cases, 18 to 23 years in 3 cases. The average age is 13.5 years old. Diagnosis: Class Ⅰ 16 cases, Class Ⅱ 2 cases, Class Ⅲ 2 cases. Gross classification: 20 cases were mainly Ⅰ ~ 1, of which 2 cases with Ⅱ ~ 4, 2 cases with Ⅱ ~ 3. No abnormal facial jaw. Correction: crowded forefront of unilateral crowded removal of the affected side 4, slightly crowded on both sides of the anterior teeth scattered, as the original midline offset, as appropriate, by a side 4. Of which 10 cases with the reduction by 4 or a lower incisor. In 20 cases, 14 cases were treated with active appliances. The average course of 13.6 months.