Specifications for machining the bovine cortical bone in relation to its microstructure.
Specifications for machining the bovine cortical bone in relation to its microstructure.
复制标题
DOI：
10.1016/j.jbiomech.2009.08.017
复制
发表时间：
2009-12
影响因子：
2.4
通讯作者：
N. Sugita;M. Mitsuishi
中科院分区：
文献类型：
--
作者：
N. Sugita;M. Mitsuishi
迄今为止，已经开发了许多用于在整形外科手术期间切割人骨的装置。然而，骨骼是各向异性材料，其加工特性取决于刀具进给方向。在这项研究中，显微切割牛皮质骨，并在显微镜下观察其结构。此外，在考虑骨组织各向异性的同时，动态观察了骨加工过程中切屑的形成和切削力的测量。特别地，观察和分析了次级骨单位的断裂和骨中裂纹的扩展。结果表明，当切削深度超过20μm，且大于同心层间距时，裂纹与切屑一起形成。提出了一种新的骨加工方法。该方法基于骨中裂纹扩展的特性，期望产生低机械应力，实现骨等生物组织的高效且精密的加工。
Until date, many devices have been developed for cutting human bones during orthopedic surgeries. However, bones are anisotropic material, and their machining characteristics depend on the tool feed direction. In this study, microcutting of the bovine cortical bone is performed and its structure observed under a microscope. Furthermore, the formation of cutting chips and measurement of the cutting force during bone machining are dynamically observed while considering the anisotropy of bone tissue. In particular, the fracture of secondary osteons and crack propagation in bones are observed and analyzed. The results indicate that when the cut depth exceeds 20μm and is greater than the interval of concentric lamellae, cracks are formed together with chips. A new method for bone machining is proposed. This method is based on the characteristics of crack propagation in bones and is expected to produce low mechanical stress and realize highly efficient and precise machining of living tissues such as bones.