Ex vivo imaging of early dental caries within the interproximal space

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DOIResolve DOI: http://doi.org/10.1117/12.809553
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Proceedings titleProceedings of the SPIE
ConferenceLasers in Dentistry XV. Session Lasers in Dental Hard Tissue, January 24, 2009, San Jose, California, US
Pages716206716213; # of pages: 7
Subjectearly dental caries; optical coherence tomography; interproximal space; approximal surface; rotary catheter probe
AbstractOptical coherence tomography (OCT) is emerging as a technology that can potentially be used for the detection and monitoring of early dental enamel caries since it can provide high-resolution depth imaging of early lesions. To date, most caries detection optical technologies are well suited for examining caries at facial, lingual, incisal and occlusal surfaces. The approximal surfaces between adjacent teeth are difficult to examine due to lack of visual access and limited space for these new caries detection tools. Using a catheter-style probe developed at the NRC-Industrial Materials Institute, the probe was inserted in to the interproximal space to examine the approximal surfaces with OCT imaging at 1310 nm. The probe was rotated continuously and translated axially to generate depth images in a spiral fashion. The probe was used in a mock tooth arch model consisting of extracted human teeth mounted with dental rope wax in their anatomically correct positions. With this ex vivo model, the probe provided images of the approximal surfaces revealing morphological structural details, regions of calculus, and especially regions of early dental caries (white spot lesions). Results were compared with those obtained from OCT imaging of individual samples where the approximal surfaces of extracted teeth are accessible on a lab-bench. Issues regarding access, regions of interest, and factors to be considered in an in vivo setting will be discussed. Future studies are aimed at using the probe in vivo with patient volunteers.
Publication date
PublisherSociety of Photo-Optical Instrumentation Engineers (SPIE)
Copyright noticeMaterial in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission.
AffiliationNRC Institute for Biodiagnostics (IBD-IBD); NRC Industrial Materials Institute (IMI-IMI); National Research Council Canada
Access conditionavailable
Peer reviewedYes
NRC number52326
NPARC number10990277
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Record identifierbf5d8130-7dd2-4cb1-a5b5-2dc82c15bb83
Record created2009-10-03
Record modified2016-05-09
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