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Journal of Medical Imaging

Assessment of cervical demineralization induced by Streptococcus mutans using swept-source optical coherence tomography
Author(s): Hiroki Tezuka; Yasushi Shimada; Khairul Matin; Masaomi Ikeda; Alireza Sadr; Yasunori Sumi; Junji Tagami
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Paper Abstract

Exposed root surfaces due to gingival recession are subject to biofilm stagnation that can result in caries formation. Cervical enamel and dentin demineralization induced by a cariogenic biofilm was evaluated using swept-source optical coherence tomography (SS-OCT). The cementoenamel junction (CEJ) sections of extracted human teeth were subjected to demineralization for 1, 2, or 3 weeks. A suspension of Streptococcus mutans was applied to form a cariogenic biofilm using an oral biofilm reactor. After incubation, demineralization was observed by SS-OCT. For the analysis of SS-OCT signal, the value of the area under the curve (AUC) of the signal profile was measured. Statistical analyses were performed with 95% level of confidence. Cervical demineralization was displayed as a bright zone in SS-OCT. The demineralization depth of dentin was significantly deeper than that of enamel (p<0.05). Enamel near the CEJ demonstrated a significant increase of AUC over the other enamel region after the demineralization. The gaps along the dentinoenamel junction were additionally observed in SS-OCT. SS-OCT was capable of monitoring the cervical demineralization induced by a cariogenic biofilm and is considered to be a promising modality for the diagnosis of cervical demineralization.

Paper Details

Date Published: 8 March 2016
PDF: 7 pages
J. Med. Img. 3(1) 014504 doi: 10.1117/1.JMI.3.1.014504
Published in: Journal of Medical Imaging Volume 3, Issue 1
Show Author Affiliations
Hiroki Tezuka, Tokyo Medical and Dental Univ. (Japan)
Yasushi Shimada, Tokyo Medical and Dental Univ. (Japan)
Khairul Matin, Tokyo Medical and Dental Univ. (Japan)
Tsurumi Univ. (Japan)
Masaomi Ikeda, Tokyo Medical and Dental Univ. (Japan)
Alireza Sadr, Univ. of Washington School of Dentistry (United States)
Yasunori Sumi, National Ctr. for Geriatrics and Gerontology (Japan)
Junji Tagami, Tokyo Medical and Dental Univ. (Japan)


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