Jorn L P, Fridén T, Ryd L, Lindstrand A
Department of Orthopedics, Lund University Hospital, Sweden.
Acta Orthop Scand. 1997 Oct;68(5):427-9. doi: 10.3109/17453679708996256.
We measured, by radiostereometric analysis (RSA), the sagittal knee laxity in 20 consecutive patients with chronic anterior cruciate ligament injuries before, 1 year and 3 years after reconstruction with a free bone-patellar tendon-bone graft. The grafts had been perioperatively tensioned, using a 10-15 N load. An increased displacement with increasing load was present before reconstruction, but we found no differences between 100 and 150 N stress load 1 and 3 years after the operation. The total anteroposterior displacement decreased from 12.7 mm before the reconstruction to 5.1 mm 1 year and 5.6 mm 3 years postoperatively, using a stress load of 150 N. Thus, we found both a definite end-point of joint displacement and persistent stability without elongation of the graft with time, when care was taken not to over-constrain the knee by a high initial graft tension.
我们通过放射性立体测量分析（RSA），对20例慢性前交叉韧带损伤患者在使用游离骨-髌腱-骨移植物重建前、重建后1年和3年时的膝关节矢状面松弛度进行了测量。移植物在围手术期使用10 - 15 N的负荷进行了张力调整。重建前存在随着负荷增加位移增大的情况，但我们发现在术后1年和3年，100 N和150 N应力负荷之间没有差异。使用150 N的应力负荷时，前后总位移从重建前的12.7 mm降至术后1年的5.1 mm和术后3年的5.6 mm。因此，我们发现当注意避免因过高的初始移植物张力过度限制膝关节时，关节位移有明确的终点，并且移植物不会随时间延长而持续稳定。
