成人髋臼发育不良的个性化股骨假体设计

The computer assisted design of the custom prosthesis for acetabular dysplasia

目的探讨个性化股骨假体计算机辅助设计在成人髋臼发育不良(AD)行全髋关节置换术中的应用。方法取1例AD女性患者的髋关节和股骨全长CT扫描数据,直接以Dicom格式导入Mimics 10.01矢量化处理后建立股骨三维模型,提取股骨髓腔轮廓并重组三维模型。上述模型通过Solid Work 2005完成假体的优化处理。最后利用Mimics平台装载STL功能以及手术模拟模块完成假体虚拟植入。结果实现了基于CT二维资料的三维重建,设计的假体与患者股骨髓腔匹配良好,通过模拟假体良好装配帮助解决假体前倾角调整,髓腔匹配等一系列问题。结论以现代CT扫描所获得的二维影像资料在Mimics的矢量化处理后能获得精确的股骨三维模型;提取股骨髓腔并重建模型方便准确,与计算机辅助设计软件相结合可以设计出个性化股骨假体。

Objective To explore the application of The computer assisted design of the custom prosthesis in total hip replacement for Acetabular Dysplasia （AD）. Methods Imported the Dicom images of volunteers＇ femur of AD into the Mimics 10.01 to build the 3D model. Extracted the sketch of cavity of femur and rebuild the 3D model. Exported the model into the Solid Work 2005 to design the custom prosthesis and saved it as the STL file. Loaded the STL file in Mimics 10.01 and completed the virtual implantation. Results Get the 3D model based on the CT images. The custom made prosthesis matched well with the cavity of femur. Figured out the question of femoral neck anteversion through the simulated implantation of custom prosthesis. Conclusions The 3D model was precise base on the Mimics software. The method of extracting the sketch of femur was convenient and comfortable. It was a feasible way of custom prosthesis design and providing a wide prospective.