新型3DSS-STD-Ⅱ结构光三维测量系统重建牙颌模型的可靠性对比研究  

A comparative study on the reliability of grating projection measuring system in three-dimensional reconstruction of dental cast

作　　者：吴江 高勃 赵湘辉[2] 沈丽娟 毛勇 

机构地区：[1]第四军医大学口腔医院修复科 [2]第四军医大学基础医学部神经科学研究所,陕西西安710032

出　　处：《华西口腔医学杂志》2008年第4期448-451,共4页West China Journal of Stomatology

基　　金：国家高技术研究发展计划资助项目(2002AA336050);陕西省科学技术研究发展计划资助项目(2006K052G4)

摘　　要：目的应用一种新型的三维测量系统3DSS-STD-Ⅱ对牙颌模型进行三维重建,评价该三维测量重建结果的可靠性,为口腔修复体计算机辅助设计奠定基础。方法利用新型结构光测量系统3DSS-STD-Ⅱ对标准下牙列模型从咬合面、右后侧牙列、前牙列区、左后侧牙列和正后方5个角度进行扫描,扫描后的结果经过数据合并、数据精简,利用反求软件Geomagic 6.0重建下颌牙列数字化模型。然后,用此软件自带测量工具测量切牙牙冠宽度、牙弓前段宽度、牙弓后段宽度、牙弓前段长度和牙弓后段长度相关指标,游标卡尺在石膏模型上测量各个相关指标,分析系统的可靠性、可重复性以及扫描精度。结果3DSS-STD-Ⅱ系统的可靠性与可重复性好,扫描精度结果显示与游标卡尺测量结果差异无统计学意义。结论新型结构光三维测量系统3DSS-STD-Ⅱ可靠性高、测量速度快,可以满足口腔模型三维数据快速采集和计算机辅助设计建模的需要。Objective To investigate the reliability of a newly developed grating projection system 3DSS-STD-Ⅱ by three-dimensional reconstruction of dental cast, so as to offer some evidence for dental computer aided design and computer aided manufacturing （CAD/CAM）. Methods Five groups＇ data of mandibular dentition cast from different angle： Occlusion, right lateral dentition, anterior dentition, left lateral dentition and posterior of the east were scanned and acquired by 3DSS-STD-Ⅱ new measuring system. The five groups of acquired data were then under simplification and combination process and the digital dental cast was finally reconstructed by the reverse engineering software Geomagic 6.0. After the reconstruction process, the plaster dental cast and digital reconstructed dental cast were then manually and digitally measured respectively by different items： Width of incisors, width of anterior dental arch, width of buccal segment, length of anterior dental arch and length of buccal segment. The manual process was undergone by vernier caliper and the digital process was by reverse engineering software. The statistical analysis was then undergone in order to evaluate the reliability, repeatability and scan-precision of the new grating projection system. Results With the statistical analysis results, the grating projection system 3DSS-STD-Ⅱ showed its good reliability and repeatability in three-dimensional reconstruction of dental plaster cast. There were no significant differ- ences between the data acquired by 3DSS-STD-II digital scanning system and manual measurement by vernier caliper in the precision. Conclusion The new grating projection system of 3DSS-STD-Ⅱ equipped with high relia- bility and fast speed can meet the need of the fast data acquisition and three-dimensional reconstruction of dental cast and CAD process.

关 键 词：结构光扫描 牙颌模型 三维重建 

分 类 号：R78[医药卫生—口腔医学]