广州市正常青少年临床牙冠中心高度的研究

Study on the center height of clincal crowns of normal occlusion in Guangzhou teenagers

目的:通过测量广州市正常青少年人群临床牙冠长度、临床牙冠中心高度来探讨托槽的高度定位。方法:制取59例广州市正常青少年人群的牙颌模型,使用数显游标卡尺测量临床牙冠高度及临床牙冠中心高度,对测量结果进行统计学分析。结果:广州市正常青少年人群的临床牙冠中心高度呈正态性分布。同名牙临床牙冠中心高度测量值无性别差异(P>0.05)。结论:①广州市正常青少年人群临床牙冠中心高度差异较小;②临床冠中心托槽定位法具有局限性。

Objective To investigate the height of clinical crowns and the center height of clinical crowns on normal occlusion of Guangzhou teenagers,together with the relationship between the center height of clinical crowns and bracket positioning for the patients with abnormal occlusion in Guangzhou area.Methods The data were systematically derived from 59 people with normal occlusion in Guangzhou area,The height of clinical crown and the center height of clinical crown were measured with a vernier,and the data were statistically analyzed with statistic methods.Results The distribution of the center height of clinical crowns according the normal distribution and there was no statistical difference between male and female for the center height of clinical crown（P0.05）.Conclusion ①The difference of the center height in clinical crowns among individuals with normal occlusion in Guangzhou area was minor;②Position brackets according to the center height in clinical crowns had limitation in clinical practice.