一种新型肘关节旋转中心导向器的设计及制作

Design and manufacture of a novel orientation device of elbow rotation center

目的完成一种定位肘关节旋转中心的导向器的理论设计及实物工具制作。方法通过检索2004年1月至2014年12月期间中国知网收录的3篇有关肱骨远端解剖测量的中文文献获得肘关节肱骨远端解剖学测量数据，结合相关参考文献进行理论研究，使用UCNX8．0软件进行导向器结构的理论设计，然后通过3D打印技术采用玻璃纤维材料制作肘关节导向器的实物工具；对于实物工具进行质量控制；招募5名健康青年志愿者通过模拟术中定位进行导向器定位精度研究。结果实物工具消毒前、后长、宽、高均为129、116、215mm，无改变，且无肉眼可见形变；5名健康志愿者均获得满意透视图像，所需要的透视次数6～11次，平均8．2次；完成定位所需要总时间为442～554s，平均489．2s。结论新型肘关节旋转中心导向器设计合理、肘关节旋转中心定位精度高，玻璃纤维材料可以用于新型肘关节旋转中心导向实物工具制作。

Objective To report the design and manufacture of a novel orientation device of elbow rotation center. Methods The anatomical data of distal humeral elbow were obtained from 3 reports on the anatomy of the distal humerus retrieved from CNKI from 2004 through 2014. Software UG8.0 NX, CAD/ CAM animation and video were used to design the 3D model of our novel orientation device of elbow rotation center. The glass fiber physical model of the device was manufactured using 3D printing technology. Five healthy volunteers were recruited for a simulated surgery experiment to test the efficacy and accuracy of the device, including 4 males and 1 female, from 25 to 36 years of age. Results No change was observed before and after the device was disinfected regarding the length （129 mm）, width （116 mm） or height （215 ram）, or other shapes. Satisfactory X-ray images of the elbow were obtained in the 5 volunteers. The fluo- roscopy frequency required ranged from 6 to 11 times, averaging 8.2 times. The time needed for orientation ranged from 442.2 to 554 seconds, averaging 489.2 seconds. Conclusions Our self-designed orienta- tion device can be used to accurately position and orientate the rotation center of elbow joint, showing its reasonable design. Glass fiber materials can be used to manufacture our orientation device.