Data from: Polyelectrolyte-based wireless and drift-free iontronic sensors for orthodontic sensing

The real-time monitoring of health conditions of humans is a long-lasting
topic, but there are two major challenges. First, many biomedical
applications accept only implanted sensors. Second, tissue-like soft
sensors often suffer from viscoelasticity-induced signal drift, causing
inaccurate measurements. Here, we report a wireless and drift-free sensory
system enabled by a low-creep polyelectrolyte elastomer. The system
consists of ionotropic pressure sensors incorporating LC oscillators,
exhibiting a combined low drift ratio, high Q-factor, high robustness to
interferences, and wide-range measurement, superior to other capacitive
sensors using regular dielectrics or ionogels. We have recorded 14-day
orthodontic loads of two subjects using the system, showing pressure
decreasing from 300 to 50 kPa and torque from 12.5 to 0.5 N·mm. The
wireless, drift-free sensory system may be extended to other implants for
long-term and accurate sensing.