Dados do Trabalho

Título

SLEEP BRUXISM AND BIOLOGICAL RHYTHM IN SCHOOL-BASED SAMPLE FROM THE CITY OF PIRACICABA, SP, BRAZIL

Introdução

The possible association between sleep bruxism and variables responsible for the disruption of the biological rhythm in children may contribute to the understanding of the multifactorial etiology of bruxism.

Objetivo

To verify whether children with possible sleep bruxism (PSB) had alterations in their biological rhythm and to explore the possible factors involved, such as sleep characteristics, screen time, breathing, sugary food consumption, clenching teeth during wakefulness reported by parents/guardians

Métodos

Data were collected by online interview from 178 parents/guardians of students aged 6 to 14 years, enrolled in five public schools in Piracicaba, SP. The frequency of PSB, sociodemographic data, time of sugary, sleep data were assessed through anamnesis. The Biological Rhythm Interview Assessment in Neuropsychiatry for Kids (BRIAN-K) was applied during online interviews. It was composed by four domains (1) sleep, (2) daily routine activities, (3) social behavior and (4) eating and questions about predominant rhythms related to disposition, concentration, and change day to night. Three groups were formed: (1) without possible sleep bruxism (WPSB), (2) with possible sleep bruxism sometimes (PSBS) and (3) with possible frequent sleep bruxism (PSBF).

Resultados

The number of boys with PSB was similar to that of girls (P=0.153); body variables and sociodemographic variables were similar between groups (P>0.05); the total value of the BRIAN-K Scale for the 4 domains was significantly higher for the PSBF group compared to WSB group; first domain of BRIAN-K scale, sleep, presented a significantly higher values for the PSBS and PSBF, while in the other three domains, no significant difference between groups occurred, as well as for predominant rhythm. The only factor that differed between the groups in the bivariate analysis was clenching teeth, as the number of children with possible sleep bruxism sometimes was significantly higher (χ2, P=0.005). Multivariate ordinal logistic regression showed that sociodemographic variables were not associate with PSB, were first domain of the BRIAN-K scale, sleep, (P=0.004), and clenching teeth (P=0.022) were positively associated with PSB (OR 1.19 and 2.35, respectively).

Conclusões

Difficulties in maintaining sleep rhythm and clenching teeth during wakefulness reported by parents/guardians may determine a greater chance of children to increase the frequency of possible sleep bruxism

Palavras -chave

Sleep bruxism. Circadian rhythm. Children. Bruxism. Pediatric dentistry