应用逆向工程技术构建三维耳郭模型

3-D information acquisition and model construction of ear based on reverse engineering technique

目的:应用逆向工程技术和快速原形技术,构建健侧耳郭的三维数字化模型和制备与之完全对称的对侧耳郭树脂实体模型。方法:制作10例单侧小耳畸形患者的健侧耳郭的石膏模型,应用人体三维扫描系统对其进行三维扫描,获得耳郭的三维点云数据,从而在计算机内获得健侧耳郭和镜象翻转后的对策耳郭的三维数字化模型,应用快速原形机制作耳郭树脂实体模型。结果:获得了高精度的耳郭三维数字化模型和对侧耳郭的三维树脂模型,形象逼真,表面光滑,平均测量误差小于0.1mm。结论:应用逆行工程技术快速准确地构建了三维耳郭模型,为耳郭支架的雕刻和耳郭赝复体制作提供了更加精确的指导,实现了个性化的耳郭再造。

Objective To obtain 3-D digital data and rosin models of contralateral ears of patients with congenital microtia ear via applying reverse engineering （RE） technique and rapid prototyping （RP） technique. Methods To construct plaster models of contralateral ears for 10 patients with congenital microtia ear basing on the 3-D point cloud data obtained via 3-D scanning and computerized RE data processing, then constructed the 3-D rosin ear models through RP technique. Results We obtained precise 3-D digital data and ideal rosin models of contralateral ears. The measurement error was no more then 0.01 millimeter. Conclusion This study demonstrated that precise 3-D models of ears could be constructed by applying RE technique. What＇s more, RE technique could direct the scalping of ear framework and constructing of ear prosthesis. In conclusion, RE technique made personally ear reconstruction possible.