Saure D, Emminger A, Freyschmidt J
Rontgenblatter. 1980 Jan;33(1):43-7.
Measurements of the width of the intraarticular space were performed in x-ray films of 64 human knee joints (32 patients), taken laterally, and in standing position after 24 hours of rest in bed or after exposure to load for one hour. In more than half of the knee joints, the width of the intraarticular space increased after load. However, the distance between the articular surfaces rarely changed in the same patient in the same sense in the right and left knee joint, respectively medially and laterally. Hence, this method of indirect measurement of the cartilaginous layer is unsuitable, and the question raised in literature regarding the cartilaginous changes under load can be explained as being due to influx of fluid or as an expression of the viso-elastic properties of the articular cartilage.
对64个（32例患者）人膝关节的X线片进行关节内间隙宽度测量，拍摄的是侧位片，且拍摄时患者是在卧床休息24小时后或负重1小时后站立位。超过半数的膝关节在负重后关节内间隙宽度增加。然而，在同一患者中，左右膝关节的关节面之间的距离在内侧和外侧很少会朝着相同方向发生变化。因此，这种间接测量软骨层的方法并不适用，文献中提出的关于负重下软骨变化的问题可以解释为是由于液体流入或关节软骨粘弹性特性的一种表现。
