Saxena R K, Sahay K B, Guha S K
Biomechanics Laboratory, Centre for Atmospheric Sciences and Centre for Biomedical Engineering, Indian Institute of Technology, New Delhi.
Proc Inst Mech Eng H. 1991;205(2):89-93. doi: 10.1243/PIME_PROC_1991_205_273_02.
Freshly excised bovine knee joints were subjected to oscillation under constant load on a specially designed knee joint articulating machine with the joints subjected to moderate and high loadings of 1471.5 and 2943 N respectively. Instantaneous and equilibrium shear moduli of the articular cartilage obtained from the experimental knee joints were measured on a mechanical indentor (DuPont 943 TMA) and compared with the corresponding values of the shear moduli of the cartilage obtained from the control knee joints. At moderate load, both the instantaneous and the equilibrium shear moduli exhibit significant increase in their values. However, at high load the constant shear moduli showed a decrease in its value whereas the value of the equilibrium shear modulus was observed to increase slightly.
将刚切除的牛膝关节在专门设计的膝关节铰接机器上，分别在1471.5 N和2943 N的中等和高负荷下进行恒定负荷振荡。在机械压痕仪（杜邦943 TMA）上测量从实验膝关节获得的关节软骨的瞬时和平衡剪切模量，并与从对照膝关节获得的软骨剪切模量的相应值进行比较。在中等负荷下，瞬时和平衡剪切模量的值均显著增加。然而，在高负荷下，恒定剪切模量的值下降，而平衡剪切模量的值略有增加。
