BACKGROUND:Hip’s anatomy structure is complex, and the traditional two-dimensional imaging, such as X-ray film or CT scan, is susceptible to image overlap and other soft tissue. As a result, there are some limitations in the diagnosis of hip disease. The digital model is built based on reverse engineering and rapid prototyping. It is comprehensive, intuitive and accurate of the stereo configuration of the hip and the spatial relations of other parts’ anatomical structures. This study has a broad application prospect. OBJECTIVE:To reconstruct the personalized three-dimensional entity model of the hip bone with computer aided technology. METHODS: The human hips were scanned with a portable three-dimensional laser scanner, and then the point cloud data of the hips were gotten. The point cloud was processed and the three-dimensional model reconstruction was carried out by using the engineering software Geomagic and the computer aided software CimatronE. Three-dimensional print of hip was completed and the model was gotten, which was consistent with the geometry of hip bone, through the rapid prototyping machine. RESULTS AND CONCLUSION:A model with good geometric similarity and biomechanical characteristics was built by digital modeling method based on reverse engineering and rapid prototyping. This way of digital modeling provided the basis for digital manufacturing of artificial hip, virtual assembly, stress analysis and surgical simulation.%背景：髋骨解剖结构复杂，传统的X射线片及CT扫描等二维影像检查易受到影像重叠、软组织等的干扰，在髋骨的诊断中具有一定的局限性。通过基于逆向工程技术的数字化建模能全面、直观、精确地显示髋骨立体形态和各部位解剖结构的空间关系，在骨骼研究中有着广阔的应用前景。目的：利用计算机辅助技术重建个性化的髋骨三维实体模型。方法：使用手持式三维激光扫描仪对人体髋骨表面进行扫描，得到大量点云数据，综合使用工程软件Geomagic和计算机辅助软件CimatronE对点云进行处理并实现三维模型重建，使用快速成型机完成髋骨的3D打印，得到几何形状一致的髋骨实体模型。结果与结论：通过基于逆向工程和快速成型技术的数字化建模方法，可得到具有良好几何相似性及生物力学特性的髋骨三维实体模型，可为人工仿生髋骨的数字化制造、虚拟装配、应力分析及模拟手术等提供精确的模型基础。
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