乳前牙反的患儿在临床上比较多见，一般２．５岁以前发现反时，我们对要求矫治的患儿采取了治疗措施。据我院正畸科门诊７８例牙源性乳牙反进行矫治。其中最小１．５岁，最大的５．５岁。多见于３～４岁。由不良习惯引起错畸形４７例占大多数，乳尖牙磨耗不足１４... Anterior descending breast milk in children is more common in clinical practice, usually 2.5 years old found anti-, we require treatment of children taken treatment. According to our hospital Orthodontics 78 cases of odontogenic decidua reverse correction. The youngest 1.5 years old, the largest of 5.5 years old. More common in 3 to 4 years old. Caused by bad habits 47 cases of malocclusion malformations accounted for most of the canine teeth wear less than 14 ...