A SWIR imaging handpiece for the clinical assessment of lesion activity via dehydration: preclinical assessment

William A. Fried; Yihua Zhu; Vincent Yang; Nai-Yuan Chang; Daniel Fried

doi:10.1117/12.2550981

19 February 2020 A SWIR imaging handpiece for the clinical assessment of lesion activity via dehydration: preclinical assessment

William A. Fried, Yihua Zhu, Vincent Yang, Nai-Yuan Chang, Daniel Fried

Author Affiliations +

Proceedings Volume 11217, Lasers in Dentistry XXVI; 112170I (2020) https://doi.org/10.1117/12.2550981
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

New imaging methods are needed to assess the activity of caries lesions on tooth surfaces. Recent studies have shown that changes in the contrast of lesions during dehydration with air at SWIR wavelengths can be used to determine if lesions are active or arrested. In this study changes in the reflectance of caries lesions during dehydration with air was monitored at 1500-1750-nm on extracted teeth using an imaging system with an InGaAs camera, a light source and a 3D printed handpiece with an integrated air nozzle suitable for clinical use. Lesion structure was also assessed with optical coherence tomography and microCT for comparison. This small preclinical study demonstrated that a 3D printed appliance with integrated air for dehydration can be used to acquire SWIR dehydration curves similar to those acquired previously for benchtop imaging systems.

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William A. Fried, Yihua Zhu, Vincent Yang, Nai-Yuan Chang, and Daniel Fried "A SWIR imaging handpiece for the clinical assessment of lesion activity via dehydration: preclinical assessment", Proc. SPIE 11217, Lasers in Dentistry XXVI, 112170I (19 February 2020); https://doi.org/10.1117/12.2550981

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KEYWORDS

Short wave infrared radiation

Reflectivity

Teeth

Dental caries

Imaging systems

Optical coherence tomography

Diffusion

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