アラカワ　タカヒロ   荒川　貴博    所属   工学部 電気電子工学科    職種   准教授
言語種別	英語
発行・発表の年月	2024/02
形態種別	学術論文
査読	査読あり
標題	Mouthguard-Type Wearable Sensor for Monitoring Salivary Turbidity to Assess Oral Hygiene
執筆形態	共著
掲載誌名	Sensors
掲載区分	国外
出版社・発行元	MDPI
巻・号・頁	24(5),pp.1436
総ページ数	10
国際共著	国際共著
著者・共著者	Ichikawa K, Iitani K, Kawase G, Toma K, Arakawa T, Dao DV, Mitsubayashi K.
概要	Salivary turbidity is a promising indicator for evaluating oral hygiene. This study proposed a wearable mouthguard-type sensor for continuous and unconstrained measurement of salivary turbidity. The sensor evaluated turbidity by measuring the light transmittance of saliva with an LED and a phototransistor sealed inside a double-layered mouthguard. The sensor was also embedded with a Bluetooth wireless module, enabling the wireless measurement of turbidity. The mouthguard materials (polyethylene terephthalate-glycol and ethylene-vinyl acetate) and the wavelength of the LED (405 nm) were experimentally determined to achieve high sensitivity in salivary turbidity measurement. The turbidity quantification characteristic of the proposed sensor was evaluated using a turbidity standard solution, and the sensor was capable of turbidity quantification over a wide dynamic range of 1–4000 FTU (formazine turbidity unit), including reported salivary turbidity (400–800 FTU). In vitro turbidity measurement using a saliva sample showed 553 FTU, which is equivalent to the same sample measured with a spectrophotometer (576 FTU). Moreover, in vivo experiments also showed results equivalent to that measured with a spectrophotometer, and wireless measurement of salivary turbidity was realized using the mouthguard-type sensor. Based on these results, the proposed mouthguard-type sensor has promising potential for the unconstrained continuous evaluation of oral hygiene.
外部リンクURL	https://doi.org/10.3390/s24051436