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Time-resolved SWIR imaging for the assessment of the activity of occlusal caries lesions
  • +3
  • Daniel Fried,
  • Morgan Ng,
  • Spencer Wycoff,
  • Yihua Zhu,
  • Yi-Ching Ho,
  • Hannah Takasuka
Daniel Fried
University of California San Francisco

Corresponding Author:daniel.fried@ucsf.edu

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Morgan Ng
University of California San Francisco
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Spencer Wycoff
University of California San Francisco
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Yihua Zhu
University of California San Francisco
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Yi-Ching Ho
University of California San Francisco
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Hannah Takasuka
University of California San Francisco
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Abstract

The aim of this study was to develop a clinical SWIR reflectance handpiece to assess the activity of lesions on the occlusal surfaces. The time-resolved reflectivity of ten active and ten arrested occlusal caries lesions on extracted teeth was monitored at 1470 nm using a benchtop system and a modified clinical prototype during forced air drying. The presence of a highly mineralized surface zone measured with microcomputed tomography (microCT) was used to indicate lesion activity. Multiple kinetic parameters were extracted from the acquired SWIR time versus intensity dehydration curves and used to assess lesion activity. Three parameters: delay, %I fin, and rate calculated from the SWIR dehydration curves were significantly different (P < 0.05) between active and arrested lesions. The modified clinical probe was able to completely dehydrate all the active lesion areas in the occlusal pits and fissures in less than 30 seconds.
11 May 2023Submitted to Journal of Biophotonics
12 May 2023Submission Checks Completed
12 May 2023Assigned to Editor
12 May 2023Review(s) Completed, Editorial Evaluation Pending
12 May 2023Reviewer(s) Assigned
06 Jun 2023Editorial Decision: Revise Minor
08 Jun 20231st Revision Received
09 Jun 2023Submission Checks Completed
09 Jun 2023Assigned to Editor
09 Jun 2023Review(s) Completed, Editorial Evaluation Pending
09 Jun 2023Reviewer(s) Assigned
09 Jun 2023Editorial Decision: Accept