膝关节制动对髌韧带力学特性影响的实验研究

探讨膝关节制动对髌韧带力学特性和影响。我们将兔膝关节伸直位制动６周。然后对制动前后髌韧带的本构方程、极限强度、弹性模量、极限载荷等力学性进行研究．结果显示：正常组与制动组间髌韧带的应力－应变关系理论曲线有明显不同，其材料常数亦有显著差异；制动组髌韧带的极限强度张弹性模校正常组均有明显下降，其极限载荷下降不明显。上述结果表明膝关节制动使得髌韧带所受应力下降，为适应这种改变，组织将进行重塑，从而导致其

Effects of Immobilization on the Mechanical Properties of Rabbit Patellar Tendon

The aim of this study was to evaluate the effect of immobilization on the mechanical properties of rabbit patellar tendon(PT). IN this study, the rabbit knee was immobilized in extenison for 6 weeks, then the mechaincal properteis of PT were investigated. The results showed that the stress strain realtionship of PT could be expressed with exponential functions, and there were significant differeces between the normal group and the immobilized group in their theoretical curves of stress strain relationship and two material constants of PT.Also, significant differences were found in tensile strength and tangent modulus between the two groups, but the maximum load of PT in the immobilized group did not decrease significantly. On the basis of the findings listed above,it is believed that PT would remodel and change its mechanical properties in response to the changes of mechanical stress exerted on it when the knee is immobilized.