Phase-resolved photoacoustic spectroscopy to monitor dental plaque on tooth enamel

Recent development of photoacoustic imaging in dentistry: A review on studies over the last decade

“…Most studies focus on the ex-vivo application of PAI for the detection of tooth decay ( Arabpou et al, 2019 , Cheng et al, 2016 , El-Sharkawy and El Sherif, 2012 , Khosroshahi and Valizadeh, 2020 , Koyama et al, 2018 , Li and Dewhurst, 2016 , Periyasamy et al, 2018 , Rao et al, 2011 , Sampathkumar et al, 2014 , da Silva et al, 2021 , Tasmara et al, 2023 , Yamada et al, 2016 ). In general, clinical studies of PAI in dentistry assess the pocket depth of periodontal tissues from humans ( Fu, Khazaeinezhad et al, 2022 , Fu, Ling et al, 2022 , Fu et al, 2021 , Lin et al, 2017 , Moore et al, 2018 , Moore et al, 2022 , Mozaffarzadeh et al, 2021 ), and ex-vivo investigations employ samples from human teeth ( Alifkalaila et al, 2021 , Arabpou et al, 2019 , Cheng et al, 2016 , Dias et al, 2018 , El-Sharkawy and El Sherif, 2012 , Khosroshahi and Valizadeh, 2020 , Koyama et al, 2018 , Lee et al, 2017 , Li and Dewhurst, 2016 , Periyasamy et al, 2018 , Rao et al, 2011 , Sampathkumar et al, 2014 , da Silva et al, 2021 , Yamada et al, 2016 ), animal model for mimicking periodontal diseases ( Sari et al, 2022 ), and oral soft tissues from rats ( Widyaningrum et al, 2018 , Widyaningrum et al, 2020 ). PAI was also discovered to be useful in the investigation of dental implants and oral biofilms ( Dias et al, 2018 , Lee et al, 2017 ).…”

“… PAI is able to be used to evaluate soft tissue and bone anatomy, as well as validate the position and depth of the implant fixture. Authors (Year) Study Purpose Laser Settings and Methods Objects/Samples Outcome Comparison Dias et al (2018) Photoacoustic spectroscopy monitors and analyzes biofilm plaque on human tooth enamel samples. A 900 W xenon arc lamp with 350–900 nm (UV–VIS) and 900–2200 nm (NIR-MID infrared).…”

“…Table 2 shows the various designs in PAI. The PAI system utilized in dentistry is available in a range of configurations, including PAM ( Alifkalaila et al, 2021 , Rao et al, 2011 , Sari et al, 2022 , da Silva et al, 2021 , Tasmara et al, 2023 , Widyaningrum et al, 2018 , Widyaningrum et al, 2020 ), PAT ( Arabpou et al, 2019 , Cheng et al, 2016 , Li and Dewhurst, 2016 , Yamada et al, 2016 ), photoacoustic ultrasound (PA/US) ( Fu, Khazaeinezhad et al, 2022 , Fu, Ling et al, 2022 , Fu et al, 2021 , Lin et al, 2017 , Moore et al, 2018 , Moore et al, 2022 , Mozaffarzadeh et al, 2021 ), SAW technique ( El-Sharkawy and El Sherif, 2012 ), all-optical PAI (AOPAI) ( Sampathkumar et al, 2014 ), acoustic-resolution PAM (AR-PAM) and PA/US ( Lee et al, 2017 ), photoacoustic spectroscopy ( Dias et al, 2018 ), AR-PAM and PAT ( Periyasamy et al, 2018 ), optical-fiber based PAI system ( Koyama et al, 2018 ), photoacoustic sensors and laser-induced plasma spectroscopy ( Khosroshahi and Valizadeh, 2020 ). PAM is most frequently used to examine oral soft tissues, characterize dental anatomy, and detect dental caries; and AR-PAM with PA/US is applied to image dental implant, jawbone, and teeth in the jawbone.…”

Photoacoustic Spectroscopy and Hyperglycemia in Experimental Type 1 Diabetes

“…Unlike conventional spectroscopy, the PA technique can give information of amplitude and phase of the response of an optical excitation process. PRM method was first proposed by Mackenthun et al 16 Photoacoustic absorption spectra provide important information about molecular energy bands and allow the mapping of optical transitions 17 with overlapping bands across the optical spectrum. For example, one of the components of blood is Hb, which contains the heme group.…”

“…The Soret band is formed by a sum of absorption spectra of nitrogen groups called porphyrins. PRM has been used to separate those spectra, 17 particularly to observe the optical absorption spectrum corresponding to the presence of p450. 47 Figure 7 shows that after applying the PRM (on spectra of Fig.…”