[Polysomnographic study of bruxism in children].

Objective: To analyze the sleep electrophysiological changes and the sleep structure changes in children with bruxism by use of the polysomnography.

Methods: Twelve children with severe bruxism and 11 children who had no systemic diseases or sleep disorders were selected for polysomnography.

Results: The proportion of nonrapid eye movements sleep (NREMS)II and NREMS IV stages in bruxism group were (45.7 ± 7.1)% and (19.2 ± 4.9)%, while the control group were (52.9 ± 5.8)% and (13.3 ± 5.3)% respectively. The sleep efficiency and the latency of sleep were (84.0 ± 8.0)% and (39.33 ± 28.73) min in bruxism group, and (94.0 ± 3.7)% and (10.27 ± 7.57) min in the control group respectively. The difference was statistically significant.

Conclusions: The sleep structure is inordinate in bruxism children.