Squid Ink in Photoacoustic Imaging for Periodontal Probing
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Dr. Jesse Jokerst is Assistant Professor in the Department of NanoEngineering at the University of California in San Diego and the co-author of a very recent study that examined the use this food-grade cuttlefish ink as a contrast medium in photoacoustic ultrasound for imaging of probing depths. The study was published in the Journal of Dental Research (September 2017) and is titled: Photoacoustic Imaging for Noninvasive Periodontal Probing Depth Measurements. He kindly accepted my invitation to speak about his study and shed some light about a promising bourgeoning technique. He also prepared a very informative presentation to further explain the new concept. I hope you enjoy the presentation and that you share your questions/feedback with us oasisdiscussions@cda-adc.ca Chiraz Guessaier, CDA Oasis Manager |
Highlights
- The periodontal probe is the gold standard tool for periodontal examinations, including probing depth measurements, but is limited by systematic and random errors.
- In this study, we used photoacoustic ultrasound for high–spatial resolution imaging of probing depths. Specific contrast from dental pockets was achieved with food-grade cuttlefish ink as a contrast medium.
- Thirty nine porcine teeth (12 teeth with artificially deeper pockets) were treated with the contrast agent, and the probing depths were measured with novel photoacoustic imaging and a Williams periodontal probe.
- There were statistically significant differences between the 2 measurement approaches for distal, lingual, and buccal sites but not mesial. Bland-Altman analysis revealed that all bias values were < ±0.25 mm, and the coefficients of variation for 5 replicates were <11%.
- The photoacoustic imaging approach also offered 0.01-mm precision and could cover the entire pocket, as opposed to the probe-based approach, which is limited to only a few sites.
- This report is the first to use photoacoustic imaging for probing depth measurements with potential implications to the dental field, including tools for automated dental examinations or non-invasive examinations.
More information on Dr. Jokerst’s Bioimaging Lab
Full Interview (14.38″)