Levén H
Acta Radiol Diagn (Stockh). 1977 Nov;18(6):689-97. doi: 10.1177/028418517701800613.
For measuring sagittal instability in the knee joint a radiologic method has been developed which requires no complicated equipment, is easy to apply, and is relatively insensitive to the sources of error commonly associated with determination of sagittal instability, such as difference of flexion angle and changes in the projection. Measurements are made between reference points located in the femur and the tibia. The reproducibility of the method is high enough to make it suitable for testing instability before and after reconstructive surgery. By the use of constructed reference points sagittal instability can be distinguished from rotational instability.
为测量膝关节矢状面不稳定，已开发出一种放射学方法，该方法无需复杂设备，易于应用，并且对通常与矢状面不稳定测定相关的误差来源（如屈曲角度差异和投影变化）相对不敏感。测量在位于股骨和胫骨的参考点之间进行。该方法的可重复性足够高，使其适用于在重建手术前后测试不稳定情况。通过使用构建的参考点，矢状面不稳定可与旋转不稳定区分开来。
