中国人颈椎间盘尺寸分析

Geometric parameter analysis of Chinese cervical discs

为了给基于中国人骨骼特征的人工颈椎间盘假体关键尺寸设计及人工颈椎间盘置换术假体型号选择提供理论参考，该文制定了一套严格的颈椎间盘尺寸测量方法，利用正常中国人颈椎磁共振成像（MRI）数据，测量1600例中国人颈椎C23、C34、C45、C56、C67全5个颈椎间盘的6项尺寸参数（前高、中高、后高、椎间角、矢径、横径），统计分析中国人颈椎间盘尺寸特点。结果显示：正常中国人颈椎间盘高度随年龄的增加出现先增加后降低的趋势，在年龄组39-48岁存在极大值。颈椎间盘节段自上而下，6项尺寸参数值均相应增大，且除椎间角呈指数规律变化外，其他各参数均具有明显的线性相关性。同时，女性颈椎间盘各项尺寸约为男性相应尺寸90％。

A protocol is developed for precise measurements of the geometric parameters of cervical discs as a basis for the design of artificial cervical discs for Chinese people and the selection of total disc replacement models. The six key parameters （i. e. , the anterior height, the middle height, the posterior height, the intervertebral angle, the sagittal diameter and the transverse diameter） of all the five cervical intervertebral discs, C23, C34, C45, C56 and C67, are measured from a magnetic resonance imaging （MRI） database of normal Chinese discs. Chinese cervical disc geometric characteristics are then analyzed statistically. The height of a normal Chinese cervical disc tends to increase first and then decrease with age, with the maximum at 39-48 years old. All six parameters increase about linearly from the upper to the lower discs except for the intervertebral angle. The parameters for females are about 90% of those for males.