Diagnostic of human teeth using photoacoustic response

Yasser H. El-Sharkawy; Y. Badr; M. Gadallah; Ashraf F. El-Sherif

doi:10.1117/12.634879

15 February 2006 Diagnostic of human teeth using photoacoustic response

Yasser H. El-Sharkawy, Y. Badr, M. Gadallah, Ashraf F. El-Sherif

Proceedings Volume 6137, Lasers in Dentistry XII; 613701 (2006) https://doi.org/10.1117/12.634879
Event: SPIE BiOS, 2006, San Jose, California, United States

Abstract

Laser-induced photoacoustic spectroscopy (LIPS) can be used to measure trace-element concentration in materials, down to parts-per-million. In this paper we investigate the use of laser-induced photoacoustic response in carious teeth detection. First, we found the Q-switched Nd:YAG laser of a wavelength of 1064 nm to produce detectable response in teeth. Then, we implemented two detection techniques using a piezoelectric transducer and Michelson Interferometer. The accurately detected response of a tooth sample by the piezoelectric transducer was analyzed using spectral analysis. However, in dentistry we do not necessarily mead an exact quantitative measurement; thus we designed a more physically realizable system that measures the acoustically-induced surface displacement using Michelson Interferometer. Monitoring this surface displacement we were able to determine the physical and optical properties of the tooth sample which could be used as a basis in diagnostics. The responses obtained by both detectors were equally confined to the categorization of a carious tooth from a normal one.

Citation Download Citation

Yasser H. El-Sharkawy, Y. Badr, M. Gadallah, and Ashraf F. El-Sherif "Diagnostic of human teeth using photoacoustic response", Proc. SPIE 6137, Lasers in Dentistry XII, 613701 (15 February 2006); https://doi.org/10.1117/12.634879

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available