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首页> 外文会议>Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XIII >Development and verification of a novel device for dental intra-oral 3D scanning using chromatic confocal technology
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Development and verification of a novel device for dental intra-oral 3D scanning using chromatic confocal technology

机译：使用彩色共聚焦技术开发和验证新型口腔内3D扫描设备

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摘要

The presented work describes the development and verification of a novel optical, powder-free intra-oral scanner based on chromatic confocal technology combined with a multifocal approach. The proof of concept for a chromatic confocal area scanner for intra-oral scanning is given. Several prototype scanners passed a verification process showing an average accuracy (distance deviation on flat surfaces) of less than 31 μm ± 21μm and a reproducibility of less than 4μm ± 3μm. Compared to a tactile measurement on a full jaw model fitted with 4mm ceramic spheres the measured average distance deviation between the spheres was 49μm ± 12μm for scans of up to 8 teeth (3- unit bridge, single Quadrant) and 104μm ± 82μm for larger scans and full jaws. The average deviation of the measured sphere diameter compared to the tactile measurement was 27μm ± 14μm. Compared to uCT scans of plaster models equipped with human teeth the average standard deviation on up to 3 units was less than 55μm ± 49μm whereas the reproducibility of the scans was better than 22μm ± 10μm.
机译：提出的工作描述了基于彩色共聚焦技术与多焦点方法相结合的新型光学无粉口腔内扫描仪的开发和验证。给出了用于口腔内扫描的彩色共聚焦区域扫描仪的概念证明。一些原型扫描仪通过了验证过程，显示平均精度（平面上的距离偏差）小于31μm±21μm，重现性小于4μm±3μm。与配备4mm陶瓷球的全颚模型的触觉测量相比，对于最多8个牙齿的扫描（3单元桥，单象限），球之间的平均距离偏差为49μm±12μm，对于较大的扫描，球之间的平均距离偏差为104μm±82μm和下巴。与触觉测量相比，测得球体直径的平均偏差为27μm±14μm。与配备人牙的石膏模型的uCT扫描相比，最多3个单位的平均标准偏差小于55μm±49μm，而扫描的重现性优于22μm±10μm。

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