股四头肌腱双束重建前交叉韧带的生物力学特性研究

目的：探讨股四头肌腱的生物力学特性,为其能否应用于临床前交叉韧带（ACL）重建提供实验依据。方法：取32例新鲜尸体的1cm宽股四头肌腱,按其解剖结构分为两束：股直肌、股内、外侧肌腱合为A束,股中间肌腱为B束,用游标卡尺测量两束的宽度及厚度,然后将两束置于电子万能试验机上分别测其生物力学指标。结果：A束厚度为4.39±1.72mm,宽度为8.19±1.18mm,生物力学强度为685.67±227.09N,抗拉强度为17.00±3.48Mpa;B束厚度为3.06±1.47mm,宽度为7.10±2.03mm,生物力学强度为435.04±205.80N,抗拉强度为13.16±4.02Mpa。A束生物力学强度与ACL比较,差异有统计学意义（p〈0.05）;B束生物力学强度与ACL比较,差异有统计学意义（p〈0.05）。结论：股四头肌腱的生物力学性能不能满足ACL双束重建的要求,其在临床上应用于ACL双束重建的价值有待于进一步的深入研究。

The Biomechanical Study on the Quadriceps Tendon Used for Double-bundleReconstruction of the Anterior Cruciate Ligament

Objective： To investigate the biomechanics of the quadriceps tendon and to provide theoretical basis for double-bundle reconstruction of anterior cruciate ligament（ACL）.Methods： 32 quadriceps tendons（width 1cm） taken from fresh cadaver were dissected into 2 bundles according to the anatomy,one bundle including rectus femoris,vastus medialis and vastus lateralis was named A bundle and the other was named B bundle.The width and thickness of the A and B bundle were detected respectively with a Vernier caliper and the biomechanics were determined by WDW-30 election universal testing machine.Results： The thickness,width,ultimate load and ulti-mate tensile strength of bundle A were 4.39±1.72mm,8.19±1.18mm,685.67±227.09 N and 17.00±3.48 Mpa respectively,while for bundle B,which were 3.06±1.47 mm,7.10±2.03mm,435.04±205.80 N and 13.16±4.02 Mpa.There was difference between bundle A and the ACL（p0.05）.Conclusion： The ultimate load of bundle A was much lower than the the ACL and bundle Bwas also lower than the ACL.