Stress Detection in Bone tissue with Hierarchical Composite Structure

骨呈现出从纳米尺度的羟基磷灰石晶体和胶原分子到宏观尺度的皮质骨和松质骨的分层结构。本工作提出了一种利用HAP晶体变形信息检测组织水平应力的新方法。利用X射线衍射仪(X射线衍射仪)对样品的层状结构进行了表征。引入了一些结构参数来表征这些特性。采用X射线衍射法检测骨骼中的残余应力，观察动物四肢不同部位的应力。

Bone shows a hierarchical structure from a nano scale of hydroxyapatite crystal and collagen molecular to a macro scale of cortical and cancellous bone. This work proposed a new method of detecting stress of tissue level using the information of HAp crystal deformation. X-ray diffraction (XRD) experimental procedure was developed to measure the characteristics of hierarchical structure. Some structural parameters were introduced to represent these characteristics. Also, the XRD method was applied to detect residual stress in bone, and the stress was observed at various regions in animal extremities.