Is Sleep Bruxism the Dental Sleep Disorder?
As the dental community begins to focus more and more on sleep disordered breathing it is common to overlook sleep bruxism as an indicator of sleep quality. The dental community is extremely adept at treating the often devastating impact of sleep bruxism on the teeth. Single arch oral appliances are routinely prescribed and fabricated to protect teeth from excessive wear. The prevalence of sleep bruxism is often misunderstood because patients have no indication that they are grinding.
In his 2003 article in the journal Critical Reviews in Oral Biology and Medicine Neurobiological mechanisms involved in sleep bruxism Dr Gilles Lavigne and his team found;
“Sleep bruxism (SB) is reported by 8% of the adult population and is mainly associated with rhythmic masticatory muscle activity (RMMA) characterized by repetitive jaw muscle contractions (3 bursts or more at a frequency of 1 Hz). The consequences of SB may include tooth destruction, jaw pain, headaches, or the limitation of mandibular movement, as well as tooth-grinding sounds that disrupt the sleep of bed partners. SB is probably an extreme manifestation of a masticatory muscle activity occurring during the sleep of most normal subjects, since RMMA is observed in 60% of normal sleepers in the absence of grinding sounds” Objective monitoring jaw EMG during sleep can provide critical insight into a patient’s condition as it relates to TMJ, jaw pain and can correlate events to sleep disordered breathing
A criticism to the detection of bruxism with any other than PSG studies has always been the potential inability to discriminate between bruxism events and other oro-facial activities including coughing and talking and other lip and cheek movements. The American Academy of Sleep Medicine (AASM) also requires audio recordings available in addition to EMG in order to differentiate those events. Therefore the Nox T3 device, with its built-in true audio and EMG recording capabilities, is ideal for diagnosing bruxism. The audio recording detects grinding sounds and the EMG detects typical jaw movements. It is also possible to isolate signals from the masseter or temporalis muscles by placing a reference electrode on the zygomatic arch.
For more detailed information on the Nox T3 home sleep study device by Carefusion click: http://bit.ly/1hZcwry
Please click this link for Bruxism Scoring Guidelines Scoring Rules for Sleep Bruxism