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Yet, deploying intraoral sensors to measure oral temperature or jaw movements poses challenges in safety and acceptability. Consequently, real-world data for intraoral research is scarce. To address this gap, we leverage the widespread use of dental retainers and enhance them with Densor: an electronic sensing platform requiring only a standard smartphone for charging and data retrieval using a Near Field Communication interface. Its low power architecture enables prolonged sensing on a single charge, making it suitable for sleep studies. It can provide practitioners with feedback on treatment compliance, and is even able to detect if the user is speaking or drinking water. Densor presents an intraoral, actively powered, battery-free platform featuring multi-modal sensors and an extended lifespan.<\/jats:p>","DOI":"10.1145\/3699746","type":"journal-article","created":{"date-parts":[[2024,11,21]],"date-time":"2024-11-21T12:23:32Z","timestamp":1732191812000},"page":"1-30","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":4,"title":["Densor: An Intraoral Battery-Free Sensing Platform"],"prefix":"10.1145","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5021-9332","authenticated-orcid":false,"given":"Vivian","family":"Dsouza","sequence":"first","affiliation":[{"name":"Delft University of Technology, Delft, The Netherlands"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-6562-8688","authenticated-orcid":false,"given":"Jeffrey","family":"Pronk","sequence":"additional","affiliation":[{"name":"Delft University of Technology, Delft, The Netherlands"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-2903-7127","authenticated-orcid":false,"given":"Christian","family":"Peppelman","sequence":"additional","affiliation":[{"name":"Delft University of Technology, Delft, The Netherlands"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3445-3097","authenticated-orcid":false,"given":"V\u00edctor Ignacio","family":"Madariaga","sequence":"additional","affiliation":[{"name":"Radboud University Medical Center, Nijmegen, The Netherlands"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5166-8233","authenticated-orcid":false,"given":"Tatiana","family":"Pereira-Cenci","sequence":"additional","affiliation":[{"name":"Radboud University Medical Center, Nijmegen, The Netherlands"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6684-9723","authenticated-orcid":false,"given":"Bas","family":"Loomans","sequence":"additional","affiliation":[{"name":"Radboud University Medical Center, Nijmegen, The Netherlands"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1302-1148","authenticated-orcid":false,"given":"Przemys\u0142aw","family":"Pawe\u0142czak","sequence":"additional","affiliation":[{"name":"Delft University of Technology, Delft, The Netherlands"}]}],"member":"320","published-online":{"date-parts":[[2024,11,21]]},"reference":[{"key":"e_1_2_1_1_1","volume-title":"Densor Source Code Repository: Hardware and Software Artifacts. https:\/\/github.com\/TUDSSL\/Densor. 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