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Proceedings Paper

A new method to acquire 3-D images of a dental cast
Author(s): Zhongke Li; Yaxing Yi; Zhen Zhu; Hua Li; Yongyuan Qin
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Paper Abstract

This paper introduced our newly developed method to acquire three-dimensional images of a dental cast. A rotatable table, a laser-knife, a mirror, a CCD camera and a personal computer made up of a three-dimensional data acquiring system. A dental cast is placed on the table; the mirror is installed beside the table; a linear laser is projected to the dental cast; the CCD camera is put up above the dental cast, it can take picture of the dental cast and the shadow in the mirror; while the table rotating, the camera records the shape of the laser streak projected on the dental cast, and transmit the data to the computer. After the table rotated one circuit, the computer processes the data, calculates the three-dimensional coordinates of the dental cast's surface. In data processing procedure, artificial neural networks are enrolled to calibrate the lens distortion, map coordinates form screen coordinate system to world coordinate system. According to the three-dimensional coordinates, the computer reconstructs the stereo image of the dental cast. It is essential for computer-aided diagnosis and treatment planning in orthodontics. In comparison with other systems in service, for example, laser beam three-dimensional scanning system, the characteristic of this three-dimensional data acquiring system: a. celerity, it casts only 1 minute to scan a dental cast; b. compact, the machinery is simple and compact; c. no blind zone, a mirror is introduced ably to reduce blind zone.

Paper Details

Date Published: 2 February 2006
PDF: 6 pages
Proc. SPIE 6026, ICO20: Biomedical Optics, 602611 (2 February 2006); doi: 10.1117/12.667445
Show Author Affiliations
Zhongke Li, Northwestern Polytechnical Univ. (China)
The Second Artillery Engineering College (China)
Yaxing Yi, The Second Artillery Engineering College (China)
No. 63880 Unit of PLA (China)
Zhen Zhu, No. 63880 Unit of PLA (China)
Hua Li, No. 63880 Unit of PLA (China)
Yongyuan Qin, Northwestern Polytechnical Univ. (China)

Published in SPIE Proceedings Vol. 6026:
ICO20: Biomedical Optics
Gert von Bally; Qingming Luo, Editor(s)

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