For solving the modeling problem of porous structure design of bone scaffold, a modeling method of porous bone scaffold based on voxel model was proposed. Firstly, the surface of model triangular facets of bone scaffold was reconstructed by moving cube (MC) algorithm with the computer tomographic (CT) images. Secondly, a rapidly slicing algorithm based on surface model was proposed to obtain the cross-sectional profile of bone scaffold. Then, an isometric scanning line of cross-sectional profile was filled and dispersed to construct voxel model; subsequently, the pore unit was designed based on voxel, and the voxel model of porous bone scaffold was constructed by filling the pore units; finally, combined with additive manufacturing process, a method to generate processing path directly based on the voxel model was proposed. It can be concluded from the experiment that the porous bone scaffold could be constructed by the proposed algorithm. The parameters including pore size and porosity on the bone scaffold could be controlled through adjusting the voxel size and pore unit structures. The processing path was obtained directly from the voxel model, thus providing a feasible method for the design and manufacture of the porous bone scaffold.

为解决骨支架多孔结构设计的建模问题，提出了一种基于体素模型的多孔骨支架建模方法。首先，通过移动立方体（MC）算法和计算机断层扫描（CT）图像重建骨支架模型三角面的表面。其次，提出了一种基于表面模型的快速切片算法来获取骨支架的横截面轮廓。然后，填充和分散横截面轮廓的等距扫描线以构建体素模型；随后，基于体素设计孔隙单元，通过填充孔隙单元构建多孔骨支架体素模型；最后，结合增材制造工艺，提出了一种直接基于体素模型生成加工路径的方法。从实验中可以得出结论，该算法可以构建多孔骨支架。可以通过调整体素大小和孔单元结构来控制骨支架上的孔径和孔隙率等参数。加工路径直接从体素模型中获得，从而为多孔骨支架的设计和制造提供了一种可行的方法。