Maintenance of set force in anterior cruciate ligament grafts.
Maintenance of set force in anterior cruciate ligament grafts.
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维持前交叉韧带移植物的设定力。
DOI：
10.1002/jor.1100110117
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Lew,WD
中科院分区：
文献类型：
--
作者：
Stewart,NJ;Engebretsen,L;Lewis,JL;Lindquist,C;Lew,WD
本研究旨在确定在羊膝关节增强前交叉韧带（ACL）重建过程中，移植物节段之间的总移植物力和载荷分配如何准确设置和维持。开发了特殊的程序来减少组织蠕变的影响，并克服移植物力设置中的困难。使用骨-肌腱-骨移植物（PT）和合成增强器械（LAD）重建山羊尸体的5个膝关节。在标准化外部关节载荷下设定自体移植物和LAD之间的总移植物力和载荷分配的规定水平。固定后即刻，LAD和PT的固定力分别平均下降9%和3%。在随后的三个运动序列后，LAD的固定力从初始水平平均下降了25%，PT下降了28%。方差分析未显示运动力的损失具有统计学显著性。我们从这项体外研究中得出结论，我们的方法可用于设置ACL重建中的力，并合理维持载荷分配，但预计重建关节运动后总移植物力损失约30%。
This study was undertaken to determine how accurately total graft force and load‐sharing between graft segments could be set and maintained during augmented anterior cruciate ligament (ACL) reconstruction in the goat knee. Special procedures were developed to reduce the effect of tissue creep and to overcome difficulties in the setting of graft force. Five knees from goat cadavers were reconstructed using a bone‐tendon‐bone graft (PT) and a synthetic augmentation device (LAD). Prescribed levels of total graft force and load‐sharing between the autograft and LAD were set under a standardized external joint load. Immediately after fixation, the set force declined an average of 9 and 3% in the LAD and PT, respectively. After three subsequent exercise sequences, the set forces fell from their initial level by an average of 25% for the LAD and 28% for the PT. An analysis of variance did not show the loss of force with exercise to be statistically significant. We conclude from this in vitro study that our method can be used to set forces in an ACL reconstruction with reasonable maintenance of load‐sharing but that losses of approximately 30% of total graft force after exercise of the reconstructed joint are to be expected.