Functional, RF‐Trilayer Sensors for Tooth‐Mounted, Wireless Monitoring of the Oral Cavity and Food Consumption
Abstract
Wearable devices have emerged as powerful tools for personalized healthcare in spite of some challenges that limit their widespread applicability as continuous monitors of physiological information. Here, a materials‐based strategy to add utility to traditional dielectric sensors by developing a conformal radiofrequency (RF) construct composed of an active layer encapsulated between two reverse‐facing split ring resonators is applied. These small (down to 2 mm × 2 mm) passive dielectric sensors possess enhanced sensitivity and can be further augmented by functionalization of this interlayer material. Demonstrator devices are shown where the interlayer is: (i) a porous silk film, and (ii) a modified PNIPAM hydrogel that swells with pH or temperature. In vivo use is demonstrated by adhesion of the device on tooth enamel to detect foods during human ingestion. Such sensors can be easily multiplexed and yield data‐rich temporal information during the diffusion of analytes within the trilayer structure. This format could be extended to a suite of interlayer materials for sensing devices of added use and specificity.
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Another wearable sensor based on an oral-cavity platform recently has been demonstrated using in-mouth operation with a human subject.
“Another wearable sensor based on an oral-cavity platform recently has been demonstrated using in-mouth operation with a human subject (Fig. 6c)155.”
From Wearable biosensors for healthcare monitoring (2019) · cites this paper as [155]
In vivo use was demonstrated through the measurement of different fluid properties, such as alcohol content, salinity, sugars, pH and temperature using RF sensors.
“In vivo use was demonstrated through the measurement of different fluid properties, such as alcohol content, salinity, sugars, pH and temperature using RF sensors.”
From Wearable biosensors for healthcare monitoring (2019) · cites this paper as [155]
Such oral sensing was realized by introducing biocompatible materials, such as porous silk and hydrogels, on a tooth-mounted oral cavity sensor capable of wireless monitoring of foods during ingestion.
“Such oral sensing was realized by introducing biocompatible materials, such as porous silk and hydrogels, on a tooth-mounted oral cavity sensor capable of wireless monitoring of foods during ingestion.”
From Wearable biosensors for healthcare monitoring (2019) · cites this paper as [155]
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Wearable biosensors for healthcare monitoring
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- Authors
- Tseng, P., Napier, B., Garbarini, L., Kaplan, D. L., & Omenetto, F. G.
- Affiliations
- Tufts University (US)
- Corresponding author
- Omenetto, Fiorenzo G.
- Venue
- Advanced Materials
- Publisher
- Wiley
- Published
- 2018-03-23
- Volume
- 30
- Issue
- 18
- Pages
- e1703257-e1703257
- ISSN
- 0935-9648 (ISSN-L)
- 1521-4095
- OpenAlex
- W2793756233
- Cited by
- 221
- References
- 46
- Citations by year
- 2026: 15 · 2025: 29 · 2024: 30 · 2023: 30 · 2022: 32 · 2021: 33 · 2020: 29 · 2019: 17 · 2018: 6
- FWCI
- 8.48
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Advanced Materials (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Natick Soldier Research, Development and Engineering Center (W911QY‐15‐2‐0001)
- National Institute of Biomedical Imaging and Bioengineering (F32EB021159)
- Office of Naval Research (N00014‐13‐1‐0596)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Advanced Sensor and Energy Harvesting Materials
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Microwave and Dielectric Measurement Techniques
- Physical Sciences › Engineering › Biomedical Engineering › Non-Invasive Vital Sign Monitoring
- Keywords
- dielectric sensors, split ring resonator, wearable devices, silk films, PNIPAM hydrogel, pH-responsive hydrogels, thermosensitive hydrogel, wireless monitoring, multiplexed sensing, analyte diffusion
- MeSH terms
- Food, Humans, Mouth
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