Research On Defect Cranioplasty Based On Rapid Prototyping Manufacturing Technology

In recent years, rapid prototyping technology based on bionic manufacturing is a research hot spot, which belong to the many cross-disciplinary research topics, related to manufacturing technology, computer graphics, biomedical, materials science and other technology, bones and organs in the body of the recycling and have a wide range of life-saving applications, the use of biological forms in order to achieve the manufacture or production of biological targets in vivo for a manufacturing method of reverse engineering on the human body through the skull defect organization of three-dimensional reconstruction, the use of bionic and biological modeling of the principles and methods of manufacture using rapid prototyping technology in the shape of the skull prosthesis precision and dimensional accuracy have been on a lot of improve, reduce complications, improve with degrees. Therefore, the use of reverse engineering and rapid prototyping technology production skull prosthesis must have a practical value and significance.This article is scientific and technological development project of Jilin Province "artificial skull Express Bioactive Materials and Manufacturing Technology Research", Study of the skull defect major restoration of the rapid prototyping manufacturing technology. Using Visual C + + developed with image enhancement, segmentation, contour tracking, coordinate transformation and the coordinates of the CT data output function of image processing software, use of Matlab software implementation of the skull defects of the fitting region, and finally in the CAD software has become a three-dimensional skull repair The three-dimensional reconstruction model to STL format and the model output, and ultimately rapid prototyping machine at the completion of the prototyping and manufacturing entities. In this paper, experimental results show that the image processing technology and manufacturing technology can achieve RP prosthesis skull CT image data from the solid model to the production process. The following is a brief introduction of the course of the study:(1) skull CT image processingIn this paper, in cooperation with Jilin University hospital X-ray radiation the second section of the German Siemens Sensation 16 machine spiral CT scan of the skull entities have been the fault of skull CT images, using Visual C + + has developed a simple CT image processing software system, completed a CT scan images obtained from the median filter, image segmentation, such as a series of image processing operations, and ultimately get a better edge image information; to prepare for the back of the curve fitting, such as the use of surface modeling.(2) curve of the skull images to build bridgesAccording to the theory of Bezier curves to identify the type curve and point out the need for bridging the curve fitting, and then curve out to the bridge test, on the basis of the use of Matlab software development on the curve of the bridge system, implementation, including fault data entry, curve fitting and data implementation of the output. Curve in the process of building a bridge, the bridge in order to make both ends of the curve and achieve a better cable connection, the paper start from the point of view of graphics, design with G2 continuous link to reach the bridge algorithm - generated through the interactive general Bezier curve of the control points, thus bridging the curve configuration. At the same time, taking into account the surface characteristics of the skull, but also realize the G1 curve for building a bridge. In this paper, the development of the corresponding bridge system so that visualization of bridge lines, and referred to the bridge to verify the theory and algorithms. Through the system and the analysis of experimental results to verify the proposed hydro-bridge skull algorithm can achieve the perfect outline of the edge of bridge lines. (3) Construction of the surface defects of the skull domainWe can get at the skull defect region based on the fitting curve of the construction of surface, and surface construction are the focus of this issue, but also difficult. First of all, the use of "interactive Bezier curves have the general control point" approach, and ultimately form a complete curve can be shown. Moreover, the formation of the Q curves are Bezier curves of five bands, three of the four boundary surfaces Bezier curves are Bezier curves, so that the skull defect to build up the surface region. And to build a quality analysis of the surface, consists mainly of two aspects:â‘ error analysis;â‘¡smoothing quality inspection. Finally the use of image processing software received a document, in three-dimensional modeling CAD software Pro / E in the human skull were reconstructed three-dimensional solid model for rapid prototyping and manufacturing foundation.(4) skull prosthesis produced rapid prototyping modelFirst stage in the three-dimensional modeling to generate STL file into the MEM-300-II Express molding machine comes with the Aurora data processing software, the operation as follows: "Fileâ†'inputâ†'STL", select a STL file, the system start read into the STL model, and in the bottom section shows the status of the surface film to read a few and Vertices. Cark software to run, read into the skull of the CLI model paper at molding temperatures of the temperature settings, click the main menu "System Initializationâ†'Modeling", then system interface equipment will be prompted to the lower-left corner of the state of the current "system XY axis back to zero, you can start modeling, "preparation work is fully completed, we can carry out the processing, after processing the model, the model should not be removed immediately, but declined to table some distance from the model remain in the forming section of room time to make the model the temperature gradually dropped out immediately to avoid damage the shape of the model. Figure 2 for the skull and prosthesis prototype ABS model. (5) ConclusionThis article is scientific and technological development project of Jilin Province "artificial skull Express Bioactive Materials and Manufacturing Technology Research," Study of the skull defect major restoration of the rapid prototyping manufacturing technology.In this paper, the use of Visual C + + developed with image enhancement, segmentation, contour tracking, coordinate transformation and the coordinates of the CT data output function of image processing software, use of Matlab software implementation of the skull defects of the fitting region, and finally in the CAD software has become a three-dimensional skull Repair of three-dimensional reconstruction model to STL format and the model output, and ultimately rapid prototyping machine at the completion of the prototyping and manufacturing entities. In this paper, experimental results show that the image processing technology and manufacturing technology can achieve RP prosthesis skull CT image data from the solid model to the production process. Its flow as follows:...