A new study from the University of Eastern Finland tested 7 different polysomnography (PSG) setups to see which one(s) would accurately measure sleep bruxism.
Sleep bruxism, commonly known as clenching or grinding of the teeth during sleep, affects about 8% to 15% of the population. Sleep bruxism can lead to various negative health consequences, such as tooth wear, facial pain, and headaches. Sometimes, teeth grinding can be so loud that it disturbs the sleep of others in the same room.
Some user-friendly devices for sleep bruxism assessment that measure masticatory muscle activity have been introduced, allowing patients to use them in the comfort of their own homes. However, these devices often fall short in accuracy, failing to differentiate between sleep bruxism and other masticatory muscle activity, such as yawning and swallowing.
Previously, researchers at the University of Eastern Finland and Kuopio University Hospital in Finland developed a screen-printed emergency EEG electrode set, which was shown to be quick to use and to have high signal quality in clinical settings. In addition, the electrode set can be used for sleep stage determination during PSG.
Now, the technology used in the emergency EEG set was further developed as part of a doctoral thesis project in order to provide a highly accurate method for polysomnographic sleep bruxism assessment in research and clinical settings in patients’ own homes. The diagnostic accuracy of the electrode set was compared to the diagnostic accuracy of a conventional polysomnography and other bioelectric measurements.
“The upgraded version of the electrode set is extremely well-suited for accurate assessment of sleep bruxism severity. In fact, its diagnostic accuracy is similar to that of a conventional polysomnography, when using the same methods for differentiating sleep bruxism related activity from other nocturnal events,” says University of Eastern Finland PhD student Tomi Miettinen, MSc, in a release.
According to the study, published in Sleep and Breathing, the electrode set is reliable and easy enough to be used by patients in their own homes. Nine out of 10 at-home polysomnography recordings were of good quality, and the electrical impedance of the electrodes was at an acceptable level 90% of the time. Only one out of 101 recordings failed due to problems related to the electrode set. Supporting evidence was also found for a previous finding that some patients may present altered results on the first night due to the so-called first night effect, and sleep bruxism assessment may require more than one night of recording.
“The electrode set is especially well suited for recordings that are more demanding in assessing sleep bruxism activity accurately over the duration several nights. The electrode set could be considered especially applicable for solving different research questions related to sleep bruxism, such as unclear connections between sleep bruxism activity and its presumed consequences and comorbidities, as well as long-term efficacy of the management methods. As a tool, the electrode set has potential to increase our understanding of sleep bruxism, possibly resulting in more efficient methods to manage, or even treat sleep bruxism,” Miettinen says.
For now, the researchers are using the electrode set only for scientific research only (it does not have medical approval) and is willing to collaborate with any research group that would be willing to utilize the set in their own research. The team’s next objective is mapping potential partners for the commercialization process.