基于CT重建和机器人磨削的个性化假体CAD/CAM方法  

A CAD/CAM method of individualized prosthesis base on CT reconstructing and robot grinding

作　　者：李晴[1] 王世明[1] 吴琪[2] 庞浜 管晓东[3] 席文明[3] 高亢 Li Qing Wang Shiming Wu Qi Pang Bang Guan Xiaodong Xi Wenming Gao Kang(College of Engineering Science and Technology, Shanghai Ocean University ,Shanghai 201306, China The 82 Hospital of People＇ s Liberation Army, Huaian 223001 ,Jiangsu, China School of Aerospace Engineering, Xiamen University, Xiamen 361005, Fujian, China Nanjing Yilin Water Science and Technology Co. Ltd. , Nanjing 210011, China)

机构地区：[1]上海海洋大学工程学院,上海201306 [2]中国人民解放军第82医院,淮安223001 [3]厦门大学航空航天学院,厦门361005 [4]南京以琳水务科技有限公司,南京210011

出　　处：《现代制造工程》2017年第4期67-72,共6页Modern Manufacturing Engineering

摘　　要：人体髋关节髓腔具有个性化的S型形状,现有标准型的直柄股骨假体与病人髓腔形成三点接触,降低了股骨假体与病人髓腔的匹配度。利用猪腿骨的CT数据重建其髓腔的三维模型,将该三维模型作为假体设计模型导入机器人仿真软件进行编程和磨削仿真,并生成机器人磨削程序,利用机器人磨削程序将该假体模型复制到铜棒上。将加工好的假体与猪腿骨髓腔匹配,通过X射线图检测两者匹配情况,利用截取的骨断面测量假体与髓腔断面间的尺寸误差,验证个性化假体设计方法以及机器人磨削个性化假体的可行性。实验结果表明,假体与髓腔完成匹配后,90.84%匹配区域的假体与髓腔的间隙小于1mm。Human hip joint has a S-shaped canal, the existing standard straight hip prosthesis matching with the femur cavity of the patient,will form a three-point contact and reduce the fit precision between hip prosthesis and femur cavity. The pig shank CT data is applied to reconstruct the three-dimensional model of femur cavity to as a design model of the prothesis, which is imported into robot simulation software for programming and simulation of grinding, then, the prosthesis model is copied on the copper bar by using robotic grinding technology. After the prosthesis matched with femur cavity, the matching case is detected by X-ray image, and the size error between the prosthesis and femur cavity on the cross-sectional is measured to verify the method of individualized prosthesis design and the feasibility of robot grinding prosthesis. The experimental results show that 90.84% of the matching area is less than 1 mm when the femur cavity is matched with prosthesis.

关 键 词：CT 重建 假体 机器人磨削 

分 类 号：TP249[自动化与计算机技术—检测技术与自动化装置]