4-6岁儿童下颌骨生长发育的纵向研究

发布时间：2018-04-06 04:15

本文选题：儿童　切入点：下颌骨　出处：《武汉大学学报(医学版)》2013年03期

【摘要】：目的:对4-6岁儿童的X线头颅侧位片进行分析,研究4-6岁儿童下颌骨的生长发育规律。方法:选取深圳市市属幼儿园4岁儿童作为研究对象,连续观察3年,每年拍摄头颅侧位片,并进行计算机头影测量分析。结果:4-6岁儿童下颌骨的各角度测量指标中,除了颌角有所减小外,其余各指标都有一定程度的增加,且颌角、下颌平面角的变化具有统计学意义(P0.05)。在线距方面,下颌体长度和下颌升支高度都有显著性生长,而且,下颌升支逐年的生长量变化具有统计学意义(P0.05),ANB角、Y轴角及面角的变化无统计学意义(P0.05)。结论:4-6岁儿童下颌骨有明显的生长,且生长速度逐年下降,下颌支和下颌体发生向下向后的旋转,且下颌体旋转的程度较小,出现颌角的减小和下颌骨形状的变化。上下颌骨的矢状向关系基本不变。
[Abstract]:Objective: to study the growth and development of mandible in children aged 4-6 years.Methods: children aged 4 years old in Shenzhen municipal kindergarten were selected as the research objects. The lateral cephalograms were taken every year for 3 consecutive years, and the computer cephalometric analysis was carried out.Results among the mandibular angle measurements of children aged 4-6 years, except for the decrease of the mandibular angle, the other indexes increased to a certain extent, and the changes of the mandibular angle and the mandibular plane angle were statistically significant (P 0.05).The length of mandibular body and the height of mandibular ramus had significant growth in on-line distance. Moreover, the annual growth of mandibular ramus had statistical significance. There was no statistical significance in the change of Y axis angle and facial angle of mandibular ascending branch (P 0.05).Conclusion the mandible of the children aged 4 to 6 years old has obvious growth, and the growth rate is decreasing year by year. The mandibular branches and the mandibular body rotate backward, and the degree of rotation of the mandible body is smaller, the mandibular angle decreases and the shape of the mandible changes.The sagittal relationship of the upper and lower mandibles was basically unchanged.
【作者单位】：南方医科大学附属深圳妇幼保健院;
【分类号】：G617;R78

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