第一颈椎骨形态与下颌骨生长的相关性：上海地区12岁和15岁女性儿 …

研究第一颈椎骨形态与下颌骨的相关关系，揭示儿童生长发育过程中内在的变化规律。方法 对上海地区１２岁和１５岁两个年龄组共６５名女性儿童的头颅侧位定位片中第一颈椎骨形态和颌面部有关项目测量，分析，并进行相关性研究。

A correlate study on the first cervical vertebra and mandibular growth:A comparison of Shanghai females between 12 and 15 years old]

OBJECTIVE:To study the correlation between the cervical vertebra and mandibular growth and to reveal the intrinsic rule of the progress of individual growth, especially the trend of craniofacial development.METHODS:The morphological features of the first cervical vertebra and certain variables of craniofacial in lateral cephalometric radiographs from Shanghai females between 12 and 15 years old were measured and correlated. A set of normal values of the atlas vertebra shape of Shanghai 12 and 15 years old females were established.RESULTS:There was a significant correlation between D1 and AP of the first cervical vertebra and the direction of mandibular growth at the age of 12. But the association between atlas size ratio (AP/D1) and the mandibular growth is more notable than either AP or D1. When the atlas size ratio increased, a reduction of the amount of mandibular horizontal growth was showed, and the mandibular rotated backward; on the contrary, when the atlas size ratio decreased, the amount of mandibular horizontal growth increased and the mandibular rotated forward. CONCLUSION: The first cervical vertebra can be used as an indicator to predict the mandibular growth.