应用数字化技术和快速成型技术制作牙颌模型的准确性评价

目的:应用三维重建技术结合快速成型技术制作牙颌三维树脂模型,并对其精准性进行评价。方法:运用光栅扫描仪对患者牙列的硅橡胶阴模进行信息采集,通过Geomagic Studio图像处理软件进行三维重建,形成三维数字化模型,并以Stl格式保存,导入快速成型机,制成三维树脂牙列模型。分别对硬石膏牙列模型、数字化三维模型和树脂模型进行测量和比较,采用SPSS 16.0软件包对数据进行统计学分析。结果:三维树脂牙列模型与硬石膏牙列模型、数字化三维模型均高度相似,3组模型在牙的高度、宽度和厚度以及牙弓宽度和长度的测量数据间无显著差异(P>0.05)。结论:牙颌模型数字化技术和快速成型技术联合应用,可以辅助牙颌信息采集、制订治疗计划、矫正器设计制作,便于医患交流。

Reliability of three dimensional resin model by rapid prototyping manufacturing and digital modeling

PURPOSE: To describe a new technique for fabricating an 3D resin model by 3D reconstruction and rapid prototyping,and to analyze the precision of this method.METHODS: An optical grating scanner was used to acquire the data of silastic cavity block,digital dental cast was reconstructed with the data through Geomagic Studio image processing software.The final 3D reconstruction was saved in the pattern of Stl.The 3D resin model was fabricated by fuse deposition modeling,and was compared with the digital model and gypsum model.The data of three groups were statistically analyzed using SPSS 16.0 software package.RESULTS: No significant difference was found in gypsum model,digital dental cast and 3D resin model(P>0.05).CONCLUSIONS: Rapid prototyping manufacturing and digital modeling would be helpful for dental information acquisition,treatment design,appliance manufacturing,and can improve the communications between patients and doctors.