Three dimension digitization of tooth with structured illumination

Xianyu Su; Yiping Cao; Liqun Xiang; Wenjin Chen; Qican Zhang

doi:10.1117/12.546170

8 December 2003 Three dimension digitization of tooth with structured illumination

Xianyu Su, Yiping Cao, Liqun Xiang, Wenjin Chen, Qican Zhang

Proceedings Volume 5254, Third International Conference on Photonics and Imaging in Biology and Medicine; (2003) https://doi.org/10.1117/12.546170
Event: Third International Conference on Photonics and Imaging in Biology and Medicine, 2003, Wuhan, China

Abstract

Three-dimension (3-D) digitization of tooth is becoming an important diagnostic tool of dentistry for the quantitative medicine investigations. In this paper, an optical measurement instrument for tooth data acquisition based on the principle of structured illumination was developed. The instrument consists of a structured illumination optics, a stepping motor driven phase shifting device, a commercial CCD camera system with frame grabber interface and a control personal computer. Because there is no possibility of watching the system directly in the mouth, the measurements were still restricted to plaster casts of the tooth. With a new calibration gauge, both the phase-height mapping and 3D coordinates calibration could be done simultaneously through only one measurement. Additionally, to recover complex shape distribution of the tooth, a phase unwrapping procedure is proposed. The effectiveness of the proposed method is demonstrated by experimental results.

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Xianyu Su, Yiping Cao, Liqun Xiang, Wenjin Chen, and Qican Zhang "Three dimension digitization of tooth with structured illumination", Proc. SPIE 5254, Third International Conference on Photonics and Imaging in Biology and Medicine, (8 December 2003); https://doi.org/10.1117/12.546170

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KEYWORDS

Teeth

3D metrology

Calibration

Phase shift keying

Control systems

3D displays

Optical testing

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