7～12岁正常女性儿童颅面复合体高度变化的纵向观察

A longitudinal study of vertical growth of craniofacial complex in female children with normal occlusion from 7 to 12 years old

目的 研究混合牙列期颅面复合体高度变化的规律。方法 19名正常女性儿童 ,10人从 7岁开始 ,9人从 9岁开始 ,每年拍摄头颅侧位片一次 ,连续观察 4年。 7～ 10岁组和 9～ 12岁组分别作纵向研究。对于两个组 9～ 10岁的重叠期 ,将其结果结合起来进行混合纵向分析 ,以了解整个7～ 12岁的生长发育规律。采用SPSS 8 0软件统计处理数据。结果 观察期内 ,颅面复合体大多数部位的高度继续生长。在面前部高度的变化中 ,面中 1/ 3高度增加最多 (7～ 10岁增加 4 7mm ,P <0 0 1;10～ 12岁增加 3 9mm ,P <0 0 1) ,而面下 1/ 3高度变化不大 (7～ 10岁增加 1 3mm ,P >0 0 5 ;10～12增加 1 4mm ,P >0 0 5 )。其他部位的高度变化各有其特点。结论 提示一旦恒切牙建后 ,通过正畸治疗较难改变面前部下 1/

Objective To find the laws of vertical growth of craniofacial complex in children with mixed dentition. Methods 19 female children were annually observed with cephalometric film in 4 successive years, of whom 10 started at 7 years while the others at age of 9. The two groups were longitudinally studied. All data were analyzed by SPSS 8 0 software. Results In the observation period, the height of most craniofacial regions continually grew. In anterior face, the middle facial height increased most (increased 4 7 mm from 7 to 10 years old, P < 0 01; increased 3 9 mm from 10 to 12 years old, P < 0 01), while the lower facial height nearly unchanged(increased 1 3 mm from 7 to 10 years old, P > 0 05; increased 1.4 mm from 10 to 12 years old, P > 0 05) Some other regions had their own growing characters. Conclusions Once the occlusal relationships of permanent incisors are established, it is difficult to control the anterior lower facial height with orthodontic treatments.