Research Of Computer-Aided Bonic Tissue Scaffold Modeling Method

The design and manufacture technology of porous scaffold are the important research field in the bone tissue engineering. The suitable porosity and pore size are the key elements for scaffold modeling in the design of 3D bone tissue scaffolds. In this paper, a new method for scaffold modeling is presented based on the basic requirement of the bone tissue scaffold, a software to design bone tissue scaffold is developed on the VC++6.0 platform, which provides theoretical bases for developing and exploiting bone tissue scaffold.The main works include:By analyzing the functions, performance requirement and micro grey image of the human bone, the tissue scaffold modeling method which faced on rapid prototyping manufacturing is identified.The micro-unit of the internal scaffold and the micro-unit model are developed which aiming at the appropriate pore size and porosity.The slicing algorithm is developed which can handle the complicated 3D model such as multi-connected solid, and the slicing contour lines are sorted according to certain order. Taking into account all the complex shapes may encounter, micro-unit filling algorithm in 2D slicing is developed. The tissue scaffold data is obtained, which includes both the surface contour and the internal architecture information.Using OpenGL technology, a software of scaffold bionic design is developed on the platform of VC++6.0. Take the pore size and the porosity as the main parameters, generating the surface slicing model and the micro-unit slicing model. According to different requirement, the porosity and the pore size can be adjusted in the slicing direction. CLI interface format file also be developed, which can be used in RP manufacturing.