RF energy harvesting for intraoral orthodontic force monitoring

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Luying Zhu
  • Yongtao Ding
  • Yanqi Yang
  • Jia Pan
  • Min Gu
  • Wenping Wang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number109244
Journal / PublicationNano Energy
Volume121
Online published29 Dec 2023
Publication statusPublished - Mar 2024

Abstract

Optimal orthodontic forces need to be applied to induce appropriate biological and mechanical reactions in the periodontium, thus leading to proper tooth movements, while excessive orthodontic forces could harm the tooth roots and periodontal tissues during treatment. However, estimating orthodontic forces currently relies on clinical experience, lacking objective data and analysis; thus monitoring the in-vivo orthodontic force is essential to reducing side effects and improving orthodontic treatment. Unfortunately, in-vivo orthodontic force sensor systems are currently not available, and in-vitro ones are mostly bulky and costly. Here, we report a battery-free and wireless orthodontic force sensing system (BWS) designed for in-vivo, contactless, and real-time measurement of the orthodontic force. We developed a 915 MHz far-field RF energy harvesting system to power the intraoral BWS, and achieved an in vivo wireless measurement distance of 220 mm. This system allows in-vivo orthodontic force monitoring at anytime and anywhere, so it can be applied to improve clinical treatments and orthodontic research. Besides, in vivo experiments demonstrate that the system can harvest a voltage of 2 V even at a 350 mm distance, which highlights the device's potential to serve as a versatile platform for monitoring various oral environmental parameters through different sensors.

© 2024 Elsevier Ltd. All rights reserved.

Research Area(s)

  • Orthodontic force monitoring, Wireless power, Bioelectronics, Biomedical, RF energy harvesting

Citation Format(s)

RF energy harvesting for intraoral orthodontic force monitoring. / Li, Pengyu; Zhu, Luying; Ding, Yongtao et al.
In: Nano Energy, Vol. 121, 109244, 03.2024.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review