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Proceedings Paper

Development and verification of a novel device for dental intra-oral 3D scanning using chromatic confocal technology
Author(s): M. Zint; K. Stock; R. Graser; T. Ertl; Edgar Brauer; J. Heyninck; J. Vanbiervliet; Stefaan Dhondt; Pieter De Ceuninck; Raimund Hibst
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Paper 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.

Paper Details

Date Published: 4 March 2015
PDF: 12 pages
Proc. SPIE 9313, Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XIII, 93130U (4 March 2015); doi: 10.1117/12.2077574
Show Author Affiliations
M. Zint, Univ. Ulm (Germany)
K. Stock, Univ. Ulm (Germany)
R. Graser, Cubert GmbH (Germany)
T. Ertl, Dentsply International (Germany)
Edgar Brauer, ILM, Univ. Ulm (Germany)
J. Heyninck, Dentsply International (Belgium)
J. Vanbiervliet, Dentsply International (Belgium)
Stefaan Dhondt, Dentsply International (Belgium)
Pieter De Ceuninck, Dentsply International (Belgium)
Raimund Hibst, ILM, Univ. Ulm (Germany)


Published in SPIE Proceedings Vol. 9313:
Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XIII
Anita Mahadevan-Jansen; Tuan Vo-Dinh; Warren S. Grundfest; Quan Liu, Editor(s)

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