Thompson W O, Thaete F L, Fu F H, Dye S F
Department of Orthopaedic Surgery, University of Pittsburgh, Pennsylvania 15261.
Am J Sports Med. 1991 May-Jun;19(3):210-5; discussion 215-6. doi: 10.1177/036354659101900302.
The human knee joint represents a complex biomechanical system of which the menisci are an integral component. At present, little data exists describing the meniscal kinematics of the intact knee. Accordingly, a three-dimensional reconstruction magnetic resonance image model was used to explore this issue. Five fresh cadaveric knees were examined by magnetic resonance imaging throughout a full range of motion at 10 degrees intervals. Computer three-dimensional images of the menisci were generated and evaluated for anteroposterior excursion and deformation. During flexion, the posterior excursion of the medial meniscus was 5.1 mm, while that of the lateral meniscus was 11.2 mm. The anterior horn segments were shown to be more mobile than the posterior horn segments bilaterally. Prior limitations of meniscal kinematic assessment may be overcome with advanced imaging techniques such as magnetic resonance imaging and three-dimensional reconstruction. The menisci are highly mobile and easily deformed structures within the intact, cadaveric knee. This imaging technique may prove useful in the elucidation of meniscal dynamics. In the future, similar techniques may be applied clinically to aid in the diagnosis of joint dysfunction.
人体膝关节是一个复杂的生物力学系统，半月板是其不可或缺的组成部分。目前，关于完整膝关节半月板运动学的数据很少。因此，我们使用三维重建磁共振图像模型来探讨这个问题。对五具新鲜尸体膝关节进行磁共振成像检查，在整个运动范围内以10度间隔进行。生成半月板的计算机三维图像，并评估其前后位移和变形情况。在屈膝过程中，内侧半月板的后移为5.1毫米，而外侧半月板的后移为11.2毫米。双侧前角部分比后角部分更具活动性。通过磁共振成像和三维重建等先进成像技术，可以克服先前半月板运动学评估的局限性。在完整的尸体膝关节中，半月板是高度活动且容易变形的结构。这种成像技术可能有助于阐明半月板动力学。未来，类似技术可能会应用于临床，以辅助诊断关节功能障碍。
