Wireless, Battery-Free Smart Mouth Guard

Technology #15395

Quantifies and Monitors Bruxism (Grinding of Teeth) and Wirelessly Transmits Data

This smart mouth guard is a wireless and battery-free bruxism monitoring system capable of diagnosing and quantifying bruxism. Bruxism is a condition in which a person grinds or clenches their teeth. It affects about 10 percent of adults and about 15 percent of children in the United States, with many unaware of their condition. Undiagnosed bruxism can lead to damage to the teeth and jaw, tension headaches, facial pain, and temporomandibular disorders (TMD). Available bruxism monitoring systems require wires and restrict the wearer from free movement as well as make the device susceptible to noise, tending to make measured data inaccurate. Further, available wireless monitoring systems suffer from inaccuracies based on limited battery capacity, changes in position of the sensor or the wearer’s posture and skin resistance. Researchers at the University of Florida have developed a compact, wireless, and battery-free bruxism monitoring system that uses a split ring resonator integrated in a mouth guard for bruxism management. The bruxism monitoring system is capable of accurately recording the applied weight or force placed on the teeth during an episode of bruxism while remaining comfortable for the patient.


Wireless, battery-free smart mouth guard for diagnosing and evaluating bruxism


  • Operates without batteries, making the mouth guard less bulky and safer
  • Built on a flexible substrate, conforming to different curvatures in the mouth and ensuring comfort for patients
  • Transmits data wirelessly, enhancing convenience and data accuracy


This compact, wireless, and battery-free smart mouth guard identifies and quantifies bruxism. The mouth guard comprises piezoelectric film and a split ring resonator, wirelessly transmitting data to a receiving antenna and a frequency response measurement instrument outside of the body. During an episode of bruxism, the wearer bites down on the piezoelectric film, which is coated with silicone to minimize background noise and maximize flexibility, and the pressure is converted to an electric current.. The current influences the split ring resonator, which is a metamaterial unit cell that minimizes size. The frequency is detected wirelessly by external frequency sweeping equipment, and the intensity of the detected frequency is unique to specific loads placed on the teeth. The mouth guard does not require any battery because it utilizes a self-powering mechanism based on the piezoelectric sensors.