The effect of rapid palatal expansion on sleep bruxism in XXXX .

@entity1 @entity387 @entity26 @entity3573 @entity121
BACKGROUND: Sleep bruxism (SB) is a movement described as an involuntary mastication movement during sleep, also defined as @entity121 ( @entity121 ). It is observed in 2-40  % of the pediatric population. A link was suggested between respiratory events and @entity121 . Rapid palatal expansion (RPE) is an effective orthopedic treatment for correcting @entity3573 and @entity387 ( @entity387 ) in @entity1 . The aim was to evaluate the possible reduction of SB after rapid palatal expansion (RPE) therapy. METHODS: A total of 32 @entity1 (8-14  years old; 22 @entity1 and 10 @entity1 ) received an orthodontic treatment for @entity3573 (5  mm or more) at the orthodontics department of the Universit   de Montr  al. They underwent an ambulatory polysomnography (PSG) before, after expansion with the expander, and at the end of the study without the expander. They were classified into three subgroups based on sleep electromyography (EMG) data. RESULTS: Total sleep time and stage NREM 3 presented significant differences between the types of appliances. Moreover, there was a time effect observed for total sleep time, sleep cycles, stage NREM 2, and stage REM, while only a trend suggested for stage NREM 3. Significant differences were observed between subgroups for both @entity121 episodes and burst indexes, similarly, for the @entity26 desaturation index (ODI). A total of 50  % of the @entity1 were classified as responders when @entity121 episodes index decreased by more than 25  % when comparing treatment efficacy at baseline night. CONCLUSION: Most bruxers (65  %) reduced their @entity121 episode index after expansion, but sleep and respiratory variables remained unchanged.
