Carious growth monitoring with optical coherence tomography

A. Z. Freitas; D. M. Zezell; M. P. A. Mayer; A. C. Ribeiro; A. S. L. Gomes; N. D. Vieira Jr.

doi:10.1117/12.646131

15 February 2006 Carious growth monitoring with optical coherence tomography

A. Z. Freitas, D. M. Zezell, M. P. A. Mayer, A. C. Ribeiro, A. S. L. Gomes, N. D. Vieira Jr.

Author Affiliations +

Proceedings Volume 6137, Lasers in Dentistry XII; 613704 (2006) https://doi.org/10.1117/12.646131
Event: SPIE BiOS, 2006, San Jose, California, United States

Abstract

Optical Coherence Tomography was used to monitor subsurface caries evolution process in vitro. Human tooth was used and bacteria were employed to induce caries lesions. Twenty-five human third molars, were used in this study. The teeth were cut longitudinally at mesio-distal direction; the surfaces were coated with nail varnish except for two squared windows (2x4 mm); at the cement-enamel junction. Artificial lesions were induced by a S. Mutans microbiological culture. The samples (N = 50) were divided into groups according to the demineralization time: 3, 5, 7, 9 and 11 days. The culture medium, was changed each 48 hours. After the demineralization process the samples were rinsed with double-deionized water and stored in a humid environment. The OCT system was implemented with average power of 96 μW in the sample arm, providing a 23 μm of axial resolution. The images were produced with lateral scans step of 10 μm. The detection system was composed by a detector, a demodulator and a computer. With the images generated by OCT it was possible to determine the lesion depth as function of sample exposition time to microbiological culture. We observed that the depth of the lesion in the root dentine increased from 70 μm to 230 μm, depending of exposure time, and follows the bacterial population growth law. This OCT system accurately depicts hard dental tissue and it was able to detect early caries in its structure, providing a powerful contactless high resolution image of lesions.

Citation Download Citation

A. Z. Freitas, D. M. Zezell, M. P. A. Mayer, A. C. Ribeiro, A. S. L. Gomes, and N. D. Vieira Jr. "Carious growth monitoring with optical coherence tomography", Proc. SPIE 6137, Lasers in Dentistry XII, 613704 (15 February 2006); https://doi.org/10.1117/12.646131

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
9 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Optical coherence tomography

Teeth

Tissue optics

Tissues

Dental caries

Bacteria

Diagnostics

Show All Keywords

Keywords/Phrases

Search In:

Publication Years