目的　通过CT三维重建技术构建胫骨平台三维模型，准确测定胫骨平台线性几何参数，探讨CT三维重建技术在胫骨平台测量中的应用及临床意义。  方法    随机抽取病房、门诊患者（膝关节正常，且胫骨未受累）及健康志愿者49例，并分别按性别进行分组。通过CT三维重建技术测量胫骨平台相应线性几何参数，包括参数：胫骨平台宽、胫骨内侧平台宽、胫骨内侧平台前后径、胫骨外侧平台宽和胫骨外侧平台前后径。   结果    （1）男性胫骨平台各项线性指标均明显大于女性（P<0.01）；（2）外侧平台比内侧平台宽，前后径小于内侧平台（P<0.05）；（3）胫骨平台宽与内外侧胫骨平台前后径存在着正相关关系（P<0.05）。  结论     CT三维重建技术对胫骨平台线性几何参数的测量，能为国人膝关节假体设计改进提供一定的参考。

Objective　To construct the three-dimensional model of tibial plateau by the technique of computed tomography three-dimensional reconstruction, and explore the clinical application of using this technique in measuring the geometrical parameters of the tibial plateau.　Methods　49 patients from the wards and out-patient clinic (normal knee and any tibial injure not to be involved in ) and volunteers were recruited, and then randomly divided into 2 groups according to their gender. Linear geometric parameters of the tibial plateau including the width of the tibial plateau ( WTP )、the width of the medial tibial plateau ( WMTP )、the sagittal length of the medial tibial plateau ( SLMTP )、the width of the lateral tibial plateau ( WLTP ) and the sagittal length of the lateral tibial plateau ( SLLTP ) .   Results    （1）Male are larger in value than female in terms of the linear parameters（P<0.01）;（2）Width of the lateral tibial plateau（WLTP）was larger than the width of the medial tibial plateau (WMTP), sagittal length of the medial tibial plateau (SLMTP) was larger than the sagittal length of the  lateral tibial plateau（SLLTP）（P<0.05）; (3)Positive correlation was found between the width of tibial plateau and SLLTP or SLMTP（P<0.05）.   Conclusion    Measurement of the linear geometric parameters of the tibial plateau by technique of computed tomography three-dimensional reconstruction, could provide valuable data on the design and improvement of the knee geometry in Chinese people.