前牙修复体形状计算机辅助设计的方法学研究

Study on Computer Aided Design System of Anterior Prosthesis in Terms of Artificial Neural Network

目的 建立前牙冠桥修复体形状的计算机辅助设计系统 ,增进医、患、技间的信息交流 ,提高前牙修复体的美学质量。方法 采用数码相机采集图象 ,采用空间域方法、邻域平均法、图像平均法和图像平衡法等进行图像预处理 ;建立样本牙形库 ,通过对样本牙、缺失牙的特征选择、提取和排序 ,运用计算机基于串 -并方式的三层可调隐单元模糊神经网络法 ,结合医生、患者的意见 ,进行前牙修复体计算机的形状自动设计和手动个性化设计。结果 在该系统的支持下 ,对前牙各种不同缺失与缺损临床病例 86例进行设计 ,医生、患者共同参与设计形状 ,打印制作配方 ,形状匹配效果满意。结论 实现了修复体形状的计算机自动匹配和个性化设计 ,促进了人工神经网络技术。

Objective This study was to develop computer aided design system of anterior prosthesis,which can improve information communication among doctors,technicians, patients and raise anterior prosthesis cosmetic effect. Methods Digital camera was used for image capture;Space field method,neighboring field average method,midst value filter method, and image average method were used for image pre process;sample teeth were constructed;anterior prosthesis were automatically designed through tooth feature extraction. Results 86 patients were prosthetically designed through this CAD system with excellent results.Conclusion This system implemented anterior prosthesis CAD rapidly,guided clinical application and promoted information process in the field of prosthetics. [