不同砂轮磨削牛密质骨的磨削力研究

Study on grinding force of bovine cortical bone by different grinding wheels

本实验选取与人体骨组织生物力学性能相接近的牛长骨为研究对象，用不同种类的砂轮进行磨削，研究骨组织磨削特性。实验结果表明：长骨骨干不同方向的磨削力不同，截面磨削力最大，侧面磨削力次之，表面磨削力最小；骨组织磨削力随磨削深度和工件速度的增大而增大，随砂轮速度的增大而减小；采用金刚石砂轮磨削骨组织的磨削力比采用氧化铝砂轮磨削时的磨削力要小得多；骨组织的磨削力比在3～5之间。通过对骨组织磨削特性的研究，为磨削技术在骨外科手术中的应用提供一定的参考。

Bovine cortical bone, which has a similar biomechanical property to human bone tissue is selected to carry out experiments to study bone tissue grinding characteristics. The experimental results show that： grinding forces of bovine cortical bone along different directions are different. The grinding force ircrease in turn while grinding on three different sections： the section perpendicular to the axis of tibia, the section parallel to the axis of tibia and the section parallel to the surface of tibia. It also increases with the increase of cutting depth and workpiece feed speed, and decreases with the increase of grinding speed. The grinding force of diamond grinding wheel is smaller than that of alumina grinding wheel. In addition, grinding force ratio of bovine cortical bone is between 3 and 5. The results of this study on grinding characteristics of bovine cortical bone will provide a certain technical reference for the application of grinding technology in bone surgeries.