Obligatory medical device diagnostics.
- Polysomnography (sleep laboratory; measurement of various body functions during sleep that provide information about sleep quality) – gold standard for diagnosis of sleep bruxism (SB); recorded:
- Electromyography (EMG) – measurement of electrical muscle activity.
- Encephalogram (EEG) – recording the electrical activity of the brain.
- Electrocardiogram (ECG) – recording the electrical activity of the heart muscle.
- Electrooculography (EOG) – method of measuring the movement of the eyes or changes in the resting potential of the retina.
- Oxygen saturation of the blood
- Lower jaw movements
- Tooth-associated grinding noises
Sleep bruxism (SB) is present when:
- > 4 episodes of bruxism* per hour.
- > 6 activity peaks per episode
- And/or > 25 activity peaks* * per hour of sleep.
- And at least two crunches per night
* Bruxism episode = at least six consecutive activity peaks* * Activity peaks = EMG activity peaks that are at least twice the amplitude of resting tone; activities are counted as one activity peak if the pause between peaks is < 2 seconds; pauses ≥ 3 seconds separate two activity peaks
