论文部分内容阅读
目的采用CT三维成像观察研究正常非负重时膝关节伸屈过程中胫骨不随意轴向旋转。方法对正常志愿5例10个膝关节,采用螺旋CT三维成像技术,通过膝关节伸屈过程中股骨内外侧髁旋转轴心相对胫骨平台的前后移位,测量正常非负重时膝关节伸屈过程中胫骨轴不随意向旋转。结果CT三维重建测量结果:0°～120°屈曲过程中胫骨平均轴向内旋(18.7°±1.5°),其中0°～30°、30°～60°、60°～90°和90°～120°屈曲时,胫骨分别平均内旋(4.1°±1.2°)、(2.1°±1.2°)、(3°±2.1°)和(9.5°±1.6°)。结论CT三维重建可以作为一种研究人工关节置换前后胫骨轴向旋转的手段;正常成人在膝关节从0～120°屈曲过程中,胫骨发生平均19°内旋。
Objective To observe the non-axial rotation of the tibia in knee flexion and extension during normal non-weight-bearing by CT three-dimensional imaging. Methods Ten patients with normal knee joint were selected from five volunteers. Spiral CT three-dimensional imaging was used to measure the flexion and extension of the knee joint under the normal non-weight-bearing conditions through the anteroposterior displacement of the medial and lateral femoral condyles relative to the tibial plateau during flexion and extension of the knee joint In the tibia shaft is not free to rotate. Results Three-dimensional computed tomography (CT) reconstruction results showed that the mean axial internal rotation (18.7 ° ± 1.5 °) of tibia during 0 ° ~120 ° flexion was between 0 ° and 30 °, between 30 ° and 60 °, between 60 ° and 90 ° and 90 ° At ~ 120 ° flexion, the tibia averaged 4.1 ° ± 1.2 °, 2.1 ° ± 1.2 °, 3 ° ± 2.1 ° and 9.5 ° ± 1.6 °, respectively. Conclusion CT three-dimensional reconstruction can be used as a means to study the axial rotation of the tibia before and after artificial joint replacement. In normal adults, the tibia is internally rotated by 19 ° during flexion from 0 to 120 °.