Depth profile analysis of the chemical and morphological changes in CO2-laser-irradiated dental enamel

Michael J. Zuerlein; Daniel Fried; John D. B. Featherstone

doi:10.1117/12.348350

19 May 1999 Depth profile analysis of the chemical and morphological changes in CO₂-laser-irradiated dental enamel

Michael J. Zuerlein, Daniel Fried, John D. B. Featherstone

Proceedings Volume 3593, Lasers in Dentistry V; (1999) https://doi.org/10.1117/12.348350
Event: BiOS '99 International Biomedical Optics Symposium, 1999, San Jose, CA, United States

Abstract

Previous studies have shown that IR irradiation of dental enamel at specific wavelengths results in chemical changes in the mineral phase that reduce the progression of sub- surface caries-like lesions. The inhibition of lesion progression has been correlated to the decomposition of carbonate in the irradiated enamel mineral. The present study investigated loss of the carbonate component as a function of depth with 1 micrometers resolution by measuring the strength of the spectrum in the region of the carbonate absorption bands near 1400 cm^-1. Bovine enamel samples were laser treated at λ=9.6 μm with a pulse duration of either 2 μs or 100 μs and at λ=10.6 μm with a pluse duration of 2 μs. The depth of treatment was compared with numerical simulation of the temperature rise in enamel due to laser heating. The temperature rise needed to initiate carbonate loss was 400° C, but complete carbonate loss did not occur until surface temperatures were reached which exceeded the melting temperature (800-1200 °C). The depth of the treatment varied depending upon the absorption coefficient, pulse duration, and fluence of the laser irradiation.

Citation Download Citation

Michael J. Zuerlein, Daniel Fried, and John D. B. Featherstone "Depth profile analysis of the chemical and morphological changes in CO₂-laser-irradiated dental enamel", Proc. SPIE 3593, Lasers in Dentistry V, (19 May 1999); https://doi.org/10.1117/12.348350

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