应用快速成型技术制造骨科个体化内植物  

Study of custom-made prosthesis based on rapid prototyping technique

作　　者：滕勇[1] 王臻[1] 李涤尘[2] 宿学家[3] 刘非[2] 宦怡[4] 龚雪鹏[2] 

机构地区：[1]第四军医大学西京医院骨科研究所,西安710032 [2]西安交通大学先进制造技术研究所 [3]第四军医大学西京医院放射科 [4]第四军医大学西京医院心脏外科

出　　处：《中国矫形外科杂志》2004年第14期1077-1079,共3页Orthopedic Journal of China

基　　金：国家自然科学基金资助 (基金号 :599750 74)

摘　　要：目的 :探讨基于快速成型技术的个体化人工内植物制造方法。方法 :拟制造一个人工半膝关节。对猪股骨下端进行螺旋CT扫描 ,利用自主开发的图像格式转换软件进行矢量转换 ,经矢量化三维重建后 ,提取出感兴趣的软骨下骨和关节软骨表面轮廓的三维图像 ,然后进行假体的计算机辅助设计 ,在LPS 60 0快速成型机上制出快速成型树脂模 ,经精密铸造 ,获得钛合金假体 ,然后进行动物实验 ,对制造精度进行检验。结果 :制造出个体化人工膝关节 ,经动物实验 ,与软骨下骨、对侧关节匹配良好。结论 :经CT数据获得骨骼三维轮廓信息 ,利用快速成型技术建模、熔模铸造可以快捷地制造出个体化假体 。Objective: To explore a new way of manufacturing custom-made prosthesis based on rapid prototyping technique.Method:The pig′s distal femur was scanned with Picker 6000 spiral computed tomography(CT).Then downloaded the transaxial 2D image data and convered them into 2D digitized contour data.The 3D wire frame and solid images of femoral condyle could be reconstructed in software of Surfacer 9.0. Subsequently the 3D contour image of articular cartilage was extracted.Based on the extracted 3D contour image,the CAD of the custom-made artifical knee joint was accomplished in Surfacer software,imported it into the rapid prototyping machine,and the resin prototype was achieved,then the negative mould was sent to the factory to manufacture Ti-6Al-4V alloy prosthesis through ordinary mould-melted founding process.Finally,the prosthesis was applied in the pig to test the manufacturing method.Result:A custom-made artifical prosthesis was made.It was press-fit well to the subchondral bone.Conclusion:The rapid prototyping technique could be used to manufacture clinical prosthesis.The manufacturing process had the advantage of rapidness and precision.It could be a good idea to solve the complicated fracture.

关 键 词：个体化 内植物 图像处理 计算机辅助 快速成型 

分 类 号：R318.17[医药卫生—生物医学工程]