【摘要】 目的 研究人髌腱密度与其生物力学的关系,寻找能于前交叉韧带重建术前检测髌腱移植物生物力学性质的方法。方法 对20例不成对人体髌腱(男10例，女10例)进行单轴拉伸试验,来研究供者性别及髌腱密度对其生物力学性质的影响, 髌腱密度根据其所测得体积和质量计算出。结果 髌腱的生物力学性质基于性别上的差异均无显著性, 而与其密度呈正相关。密度>1.68g/cm3(n=8)的髌腱的最大抗张强度比质量密度<1.68g/cm3(n=12)者明显要高。结论 髌腱密度可以用来评价该髌腱的质量, 因此，可利用术前测量活体内髌腱的密度来决定该前交叉韧带重建是用异体移植物还是自体移植物。

    【关键词】 髌腱；密度；移植物质量；生物力学性质

    The mechanical properties of the human patellar tendon correlated to its mass density

    XIA Zhi-lin,WANG Xin，FANG Li-ming,et al.

    Beijing Corps NO.2 Hospital,Chinese People’s Armed Police Forces,Beijing 100037,China

    【Abstract】 Objective To study the effects of tissue mass density on the mechanical properties of the patellar tendon and find out predictors of the mechanical properties of the patellar tendon, used as grafts in anterior cruciate ligament reconstruction surgeries.Methods Uniaxial tension tests were performed to determine the effects of donor sex and mass density of the tissue on the mechanical properties of twenty unpaired human patellar tendons(10 male and 10 female).Mass density of the patellar tendon was determined by measuring its volume and mass.Results No evidence of sex-based differences in any of the mechanical properties of the patellar tendon was found.The mechanical properties of the patellar tendon were significantly correlated to its mass density.The tensile strength were significantly higher for those patellar tendons having a mass density greater than 1.68g/cm3.Conclusion The mass density of the patellar tendon may be considered as an indicator of mechanical properties of the patellar tendon or graft quality.In vivo measurement of the mass density of the patellar tendon,prior to surgery,can be used to decide if a particular ACL reconstruction should be carried out with an allograft or an autograft. ......