The Prevalence of Bruxism and Correlated Factors in Children Referred to Dental Schools of Tehran, Based on Parent's Report.
OBJECTIVE
Bruxism is defined as the habitual nonfunctional forceful contact between occlusal tooth surfaces. The aim of this study was to determine the prevalence of bruxism and correlated factors in children referred to dental schools of Tehran, based on Parent's report.


METHODS
This cross-sectional descriptive study was conducted on 600 4-12 year-old children with a mean age of 7.4±2.4 years, who were referred to four dental schools in Tehran. After collecting information with questionnaire filled out by parents, χ(2), Fisher Test, Mann-Whitney and t-Test were used to analyze the data.


RESULTS
The prevalence of bruxism was 26.2%. Bruxism begun in average at the age of 4.9±2 years. Also it occurred 2.6 times more in children who had a family history of bruxism (father-mother), compared to children who didn't have such a history. 87% of children with bruxism had a history of distressing events in their life, and 13% of children with bruxism did not report any history of distressing events in their life. In this study most common oral habit was nail biting. In study of parasomnias, drooling was the most, and snoring the least reported sleep disorder. Bruxism in children with drooling was twice more than in other children. The prevalence of bruxism in children with temporomandibular disorder was 63.6% and in children without TMD was 24.7%.


CONCLUSIONS
Based on Parent's report, 26.2% of children showed bruxism and there was a significant relation between bruxism and mother's job, family history, distressing event in life, parasomnias, especially drooling and sleep walking, TMD, hyperactivity, depression, acrophobia and lygophobia.
Department of Pediatric Dentistry, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, IR Iran ; Dental Research Center, Tehran University of Medical Sciences, Tehran, IR Iran.
Bahman
B
Seraj
Mehdi
M
Shahrabi
Sara
S
Ghadimi
Rahil
R
Ahmadi
Jaleh
J
Nikfarjam
Farid
F
Zayeri
Fatemeh Pour
FP
Taghi
Hadi
H
Zare