Cadaveric hip joints were tested in a hip function simulator which subjected the femoral head to a cycle of loading and oscillation similar to that experienced during walking and measured the frictional torque transmitted to the acetabulum. Silicone fluids with viscosities from 10-2 Pa s (pascal second) to 30 Pa s were used as lubricants and the transition from mixed to full fluid film lubrication was observed around 5 x 10(-2) Pa s. Sodium carboxymethylcellulose solutions were also tested at the lower viscosities. Hyaluronidase digestion of samples of synovial fluid caused a significant increase in friction over the control samples. Trypsin digestion had no significant effect. No correlation between compliance of the cartilage and the frictional values was observed.
展开▼
机译：尸体髋关节在髋关节功能模拟器中进行了测试，该模拟器使股骨头经历了与行走过程相似的加载和振荡循环，并测量了传递至髋臼的摩擦扭矩。粘度从10-2 Pa s（帕斯卡秒）到30 Pa s的硅油用作润滑剂，在5 x 10（-2）Pa s左右观察到从混合到全液膜润滑的过渡。还以较低的粘度测试了羧甲基纤维素钠溶液。滑液样品的透明质酸酶消化导致摩擦力明显高于对照样品。胰蛋白酶消化没有明显作用。软骨的顺应性和摩擦值之间没有相关性。
展开▼
