“2× 4”矫治技术以其特有的悬梁结构产生的独特的力学特征 ,为替牙期的错牙合畸形提供了简单、有效的治疗方法 ,笔者利用“2× 4”矫治技术对几种替牙期错牙合畸形的治疗 ,取得了满意的效果。1 材料　本组 2 1例病例中 ,男 9例 ,女 12例 ,年龄 7～10 .5岁 ,平均年龄 9.2岁 , The unique mechanical characteristics of “2 × 4” orthodontic technique with its unique cantilever beam structure provide a simple and effective treatment for malocclusion with malocclusion. The author uses “2 × 4” orthodontic technique to treat several kinds of malocclusion Dental malocclusions for the treatment of malocclusion, and achieved satisfactory results. 1 Materials 21 cases of this group of patients, 9 males and 12 females, aged 7 to 10.5 years, mean age 9.2 years,