Agreement between jaw‐muscle activity measurement with portable single‐channel electromyography and polysomnography in children

Abstract

Background Polysomnography (PSG) is the gold standard for sleep bruxism (SB) assessment. High economical costs, complex technical equipment, and unfamiliar laboratory setting limit its use in children. Aim To determine the night‐to‐night variability of electromyography (EMG) episodes during a five‐night recording with the GrindCare Measure (GCM), and the agreement in the assessment of masticatory muscle activity (MMA) between GCM and PSG in children. Design Forty‐seven children from clinics of Universidad CES participated. Each participant was assessed with GCM for five consecutive nights. The last night, children underwent a single‐night PSG study, together with the GCM. Spearman correlation coefficients were used to analyze data. Results The frequency of SB occurrence was ‘sometimes’ in 12 (25.5%) and ‘usually’ in 19 (40.4%) children. Simultaneous measurements with GCM and PSG obtained during the fifth night of measurement were not significantly correlated. Correlation between GCM total EMG episodes and EMG episodes/h and PSG total SB episodes, SB episodes/h, total bursts and burst/h measured with PSG was also not significant. Conclusion EMG measurement with GCM was not accurate to detect PSG/SB in children. There was not advantage of multiple assessment for five nights with GCM, reducing the impact of night‐to‐night EMG episodes’ variability on the GCM/PSG correlation.

Polysomnographic scoring of sleep bruxism events is accurate even in the absence of video recording but unreliable with EMG-only setups

“…1). As others have also concluded [7,18,20], it seems that setups based exclusively on EMG provide a poor indication of the true MMA activity. There is a significant risk for MMA event overscoring with EMG-only setups, as OFA or OMA events could not be recognized reliably (Figs.…”

“…Carra et al compared the PSG with and without audio and video recordings and found a 24% overestimation in the MMA index when no audio or video footage was used in scoring [12]. Several studies have reported varying agreement levels between setups that use only EMG compared to PSG-AV [7,19,20]. Our group has previously compared a forehead electrode set (FES) recording for PSG-AV and found that the MMA event indices recorded fully with FES correlated well with the values obtained with PSG-AV [21].…”

Hall technique crowns and children's masseter muscle activity: A surface electromyography pilot study

“…This study used sEMG recorded MMA because it was considered to be a safe, non‐invasive, reproducible and a simple‐to‐analyse method used in children in many studies . PMCs have been subject to occlusal studies based on models, clinical photos, clinical measurements, electronic occlusal sensor devices and occlusal bite force devices .…”

Sleep Bruxism: A “Bridge” Between Dental and Sleep Medicine

“…10 The criteria cannot simply be "copied and pasted" without validation in different age populations: children, adolescents, and adults. [11][12][13][14] In the dental field, SB was considered as a parafunction, an activity occurring in parallel to masticatory function. A very recent consensus, updating the one published in 2013, suggested that "sleep and awake bruxism are masticatory muscle activities…in otherwise healthy individuals, bruxism should not be considered as a disorder, but rather as a behaviour…" and "bruxism-related masticatory muscle activities should be assessed in the behaviour's continuum."…”