4 March 2015 Development and verification of a novel device for dental intra-oral 3D scanning using chromatic confocal technology
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Proceedings Volume 9313, Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XIII; 93130U (2015); doi: 10.1117/12.2077574
Event: SPIE BiOS, 2015, San Francisco, California, United States
Abstract
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 31μm ± 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 μCT 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.
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M. Zint, K. Stock, R. Graser, T. Ertl, Edgar Brauer, J. Heyninck, J. Vanbiervliet, Stefaan Dhondt, Pieter De Ceuninck, Raimund Hibst, "Development and verification of a novel device for dental intra-oral 3D scanning using chromatic confocal technology", Proc. SPIE 9313, Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XIII, 93130U (4 March 2015); doi: 10.1117/12.2077574; http://dx.doi.org/10.1117/12.2077574
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KEYWORDS
Teeth

3D modeling

Scanners

Distance measurement

3D scanning

Optical spheres

Confocal microscopy

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