应用螺旋CT与快速成型技术制作义耳

Design and fabrication of auricular prostheses by spiral CT and rapid prototyping technology

目的:探讨应用螺旋CT与快速成型技术制作义耳。方法:采用多排螺旋CT对一名因外伤导致右耳全缺损患者扫描,对耳廓进行三维重建。在Magics RP软件中实现镜像、定位、布尔运算获得缺损区耳廓三维实体数据,应用Freeform自由造型软件对耳模型修整,使之与病人缺损区组织面完美贴合,并转化为STL文件。应用LOM法制作缺损区耳廓阳模。最后用医用硅胶翻制耳廓硅胶阳模。结果:完成耳廓软组织的三维重建,获得了缺损区耳廓的三维实体数据,最后制作的义耳与组织面完美贴合,外形精度高,个性化程度高。结论:应用螺旋CT与快速成型技术制作义耳是一种切实可行的方法。

Objective: To describe a new technique for fabricating an auricular prosthesis by spiral CT and rapidprototyping. Methods: Head spiral CT scan was undergone in a patient who had right ear defect resulting from anaccident. 3-dimension image of ears was reconstructed with the CT data. By Magics RP software, the image of normal earwas extracted, mirrored and Boolean Operated with the image of the deformed side of the face. It was well modified andsmoothened in Freeform model system so that it could precisely adapt to the deficient side of the face. A paper model earwas manufactured by laminating object manufactured from the digitized data, which had been transferred into STLformat. Finally, pouring silicone into a silicone mold from the paper ear created a silicone auricular prosthesis. Results:The dimension, shape and anatomic contour of the auricular prosthesis were really similar to the normal ear and preciselymatched the deformed area. Conclusion: The use of multi-slice CT and rapid prototyping is a convenient and effectiveapproach to fabricate an auricular prosthesis that fits the deformed side of face.