北京生物医学工程

计算机模拟分析基于X线片定制股骨柄假体的可行性_________

Computer simulation analysis for the feasibility of designing custom hip stem prostheses based on X-ray film

作者：马如宇韦建和丁华陈敏

单位：           江苏大学机械工程学院 (江苏镇江212013)    

关键词： X线片；定制型；股骨柄假体；模拟

分类号：

出版年·卷·期（页码）：2013·32·1（43-46）

摘要：

目的探讨基于X线片设计定制型髋关节股骨柄假体的可行性，以解决临床上因CT图像模糊无法设计定制型髋关节股骨柄假体问题，并降低假体设计成本。方法首先根据10根股骨的X线片，设计股骨柄假体。然后将设计出的这些股骨柄假体实体模型模拟植入从相应股骨CT图像中提取出的股骨腔线框模型中，并分析了这些股骨柄假体与股骨腔的干涉与匹配情况。最后根据一例需行髋关节置换手术的患者股骨X线片，为该患者定制了股骨柄假体，在临床上将这一假体植入患者股骨腔内。结果模拟与临床验证结果证实这些股骨柄假体不仅能够植入相应的股骨腔，而且与相应的股骨腔匹配较好。结论利用X线片为患者设计定制型髋关节股骨柄假体是可行的，且设计的股骨柄假体能够较好地与股骨腔匹配，同时验证了作者自编的软件可用于定制型髋关节股骨柄假体的设计。

Objective To investigate the feasibility of designing custom hip stem prostheses based on X-ray films.To solve the problem of custom hip stem prostheses can not be designed based on blurred CT images,and reduce the design costs.Methods First,hip stem prostheses for ten femurs were designed according to their X-ray films.Then,these hip stem prosthesis models were implanted into corresponding femur contour lines models,extracted from CT images.Interference and matching situation between prostheses and corresponding femoral cavities were analyzed.Finally,custom hip stem prosthesis,designed according to a patient’s X-ray films,was implanted into the patient’s femoral cavity.Results These hip stem prostheses could be implanted into correspon-dingfemoral cavities and matched corresponding femoral cavities well.Conclusions The design of custom hip stem prostheses based on X-ray films is practicable and this kind of hip stem prostheses matches corresponding femoral cavities well.The software system programmed by the authors canbe used to design custom hip stem prostheses for patients.

参考文献：

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