Journal
PHOTOACOUSTICS
Volume 12, Issue -, Pages 67-74Publisher
ELSEVIER GMBH
DOI: 10.1016/j.pacs.2018.10.005
Keywords
Photoacoustic imaging; Periodontal disease; Diagnosis; Gingival thickness; Pocket depth; Periodontal charting; Melanin nanoparticles
Categories
Funding
- National Institutes of Health [DP2 HL 137187, S10 OD 021821, T32 EB009380]
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The gold-standard periodontal probe is an aging tool that can detect periodontitis and monitor gingival health but is highly error-prone, does not fully characterize the periodontal pocket, and causes pain. Photoacoustic imaging is a noninvasive technique that can address these limitations. Here, a range of ultrasound frequencies between 16-40 MHz were used to image the periodontium and a contrast medium based on cuttlefish ink was used to label the pockets. A 40 MHz ultrasound frequency could spatially resolve the periodontal anatomy, including tooth, gum, gingival margin, and gingival thickness of tooth numbers 7-10 and 22-27. The photo-acoustic-ultrasound measurements were more precise (0.01 mm) than those taken with physical probes by a dental hygienist. Furthermore, the full geometry of the pockets could be visualized with relative standard deviations of 10% (n = 5). This study shows the potential for non-invasive monitoring of periodontal health with photoacoustic-ultrasound imaging in the dental clinic.
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