McKellop H A, Sigholm G, Redfern F C, Doyle B, Sarmiento A, Luck J V
Department of Orthopaedics, University of Southern California, Los Angeles.
J Bone Joint Surg Am. 1991 Oct;73(9):1382-91.
The effects of angular deformities of the tibia on the contact areas and pressures on cartilage in the knee were measured with use of pressure-sensitive film. Six cadaver knees were mounted in a test-frame, such that the offset and tilt of the knee relative to the load-axis simulated that due to angular deformities of the tibia of 5, 10, 15, or 20 degrees of varus or valgus at the levels of the proximal, middle, and distal thirds. Angulation had little effect on the contact area. The change in pressure was least for fractures of the distal third and greatest for fractures of the proximal third. For example, a 20-degree angulation of the distal third increased the maximum contact pressure by an average of 26 per cent in the compartment toward the load-axis and reduced it by 32 per cent in the opposite compartment. With an angulation of 20 degrees at the level of the proximal third of the tibia, the increase in pressure averaged 106 per cent and the decrease averaged 89 per cent. The changes in pressure with fractures at the middle third were between these extremes.
使用压敏胶片测量胫骨角畸形对膝关节软骨接触面积和压力的影响。将六个尸体膝关节安装在测试框架中，使膝关节相对于负载轴的偏移和倾斜模拟由于胫骨在近端、中部和远端三分之一处出现5、10、15或20度内翻或外翻角畸形所致的情况。成角对接触面积影响很小。压力变化在远端三分之一骨折时最小，在近端三分之一骨折时最大。例如，远端三分之一处20度的成角使朝向负载轴的隔室中的最大接触压力平均增加26%，而在相对的隔室中则降低32%。在胫骨近端三分之一处成角20度时，压力增加平均为106%，降低平均为89%。中部三分之一处骨折时的压力变化介于这两个极端情况之间。
