65位成人胸腰段椎体终板的凹陷参数分析

Measurement of concavity parameters of thoracolumbar vertebral endplate in 65 adults

目的测量胸腰段椎体终板的凹陷参数并探讨其对人工椎体端面形态改良的意义。方法选取65位成年人胸腹部CT图像进行多平面重建,根据年龄（〉40或≤40岁）及性别将被检测者分为4组。在正中矢状面及特定冠状面上测量T10下至L3上终板矢状面凹陷角（SCA）、凹陷区域位置（LCR）及冠状面凹陷角（CCA）,比较其差异。结果各年龄及性别组间凹陷参数差异无统计学意义（P〉0.05）,T10下至L3上终板中,SCA介于162.5°~163.9°之间,差异无统计学意义（P〉0.05）;各终板LCR最小值42.5%,最大值44.2%（P〉0.05）;CCA介于170.9°~175.7°之间,各椎体上终板CCA均大于下终板（T11为0.6°,P〉0.05;T12为2.7°,P〈0.000 1;L1为2.3°,P〈0.002;L2为4.2°,P〈0.000 001）。结论本研究结果可为人工椎体端面形态的改良提供初步数据,以上参数在设计和安放人工椎体时应被考虑在内。

Objective To measure the concavity parameters of thoracolumbar vertebral endplates and to explore its significance in the modification of artificial vertebral body.Methods Multi-planar reformatted computed tomographic（CT） scan images of thoraco-abdominal region were obtained in 65 adults.According to the age（40 years or ≤40 years） and gender,all the participants were divided into 4 groups.Sagittal concave angle（SCA） and location of concave region（LCR） in the midsagittal plane,as well as coronal concave angle（CCA） in the specified coronal plane were measured and compared among groups and endplates.Results No significant difference of concavity parameters was found among groups.From T10 inferior to L3 superior endplate,SCA values were between 162.5°and 163.9°,showing no significant difference（P0.05）;this was also true for the LCR（P0.05）,with the smallest value being 42.5% and the largest 44.2%;however,the values of CCA ranged from 170.9°to 175.7°,and in each vertebrae,superior endplate had a significantly larger CCA than its counterpart except for T11（T11：0.6°,P0.05;T12：2.7°,P0.000 1;L1：2.3°,P0.002;L2：4.2°,P0.000 001）.Conclusion Results of this study could provide preliminary information for the modification of the artificial vertebrobody.The parameters mentioned above should be considered in the designing and placement of the artificial vertebrobody.