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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 11 — Apr. 10, 2014
  • pp: 2366–2374

Scanning laser-line source technique for nondestructive evaluation of cracks in human teeth

Kaihua Sun, Ling Yuan, Zhonghua Shen, Zhihong Xu, Qingping Zhu, Xiaowu Ni, and Jian Lu  »View Author Affiliations


Applied Optics, Vol. 53, Issue 11, pp. 2366-2374 (2014)
http://dx.doi.org/10.1364/AO.53.002366


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Abstract

This paper describes the first application of a remote nondestructive laser ultrasonic (LU) system for clinical diagnosis of cracks in human teeth, to our knowledge. It performs non-contact cracks detection on small-dimension teeth samples. Two extracted teeth with different types of cracks (cracked tooth and craze lines), which have different crack depths, are used as experimental samples. A series of ultrasonic waves were generated by a scanning laser-line source technique and detected with a laser-Doppler vibrometer on the two samples. The B-scan images and peak-to-peak amplitude variation curves of surface acoustic waves were obtained for evaluating the cracks’ position and depth. The simulation results calculated by finite element method were combined with the experimental results for accurately measuring the depth of crack. The results demonstrate that this LU system has been successfully applied on crack evaluation of human teeth. And as a remote, nondestructive technique, it has great potential for early in vivo diagnosis of cracked tooth and even the future clinical dental tests.

© 2014 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(170.7170) Medical optics and biotechnology : Ultrasound
(240.6690) Optics at surfaces : Surface waves
(280.3375) Remote sensing and sensors : Laser induced ultrasonics

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: August 29, 2013
Revised Manuscript: December 18, 2013
Manuscript Accepted: February 25, 2014
Published: April 4, 2014

Virtual Issues
Vol. 9, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Kaihua Sun, Ling Yuan, Zhonghua Shen, Zhihong Xu, Qingping Zhu, Xiaowu Ni, and Jian Lu, "Scanning laser-line source technique for nondestructive evaluation of cracks in human teeth," Appl. Opt. 53, 2366-2374 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-11-2366


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