Open Access Research article

Socio-economic indicators and predisposing factors associated with traumatic dental injuries in schoolchildren at Brasília, Brazil: a cross-sectional, population-based study

Maria de Lourdes Vieira Frujeri1*, José Angelo Junqueira Frujeri1, Ana Cristina Barreto Bezerra1, Maria Ilma de Souza Gruppioni Cortes2 and Edson Dias Costa1

Author Affiliations

1 Department of Dentistry, University of Brasília (UnB), AEC Setor G Norte Edifício Taguacenter Sala 116, Taguatinga, Brasília, DF, Brazil

2 Department of Dentistry, University of Minas Gerais, Belo Horizonte, Brazil

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BMC Oral Health 2014, 14:91  doi:10.1186/1472-6831-14-91

Published: 18 July 2014



This study assessed the prevalence of traumatic dental injuries (TDI) and its association with sociodemographic and physical characteristics in the anterior permanent teeth of 12-year-old schoolchildren at the city of Brasília – DF, Brazil.


A cross-sectional, population-based study was conducted on a sample of 1,389 boys and girls aged 12 years, enrolled in public and private fundamental schools at the Administrative Region (RA) of Brasília, Brazil, from October 2011 to September 2012. The demographic details were achieved by a structured questionnaire. The study recorded the type of damage, the size of incisal overjet, and whether lip coverage was inadequate. Sociodemographic data included sex, income and educational level of the parents or caretakers.


A total of 1118 schoolchildren were examined, yielding a response rate of 80.48%. The prevalence of TDI was 14.63% in public schools and 23.40% in private schools. The students did not differ according to sex, income and educational level of the parents or caretakers concerning the occurrence of traumas in permanent anterior teeth. Increased overjet and inadequate lip coverage were found to be important contributing factors for TDIs.


In conclusion, this study showed an expressive prevalence of TDI in 12-year-old in schoolchildren at Brasília DF, Brazil. Sex and educational level of the parents were not associated with trauma. The increased overjet and inadequate lip coverage were significantly associated with dental trauma.

Tooth injuries; Prevalence; Demographic data