The aim of the present study was to assess the prevalence of traumatic dental injury (TDI) in primary teeth and
determine predisposing factors.
A cross-sectional study was carried out on 388 male and
female Brazilian preschool children between 60 and 71 months of age. A questionnaire addressing demographic data and
history of TDI was sent to parents/caregivers. Socioeconomic status was determined using the Social Vulnerability Index
(SVI), family income, number of people in the household and parents/caregivers' schooling. The chi-square test was used for
the statistical analysis.
The prevalence of TDI was 62.1; 61.7 of the teeth were affected by enamel
fracture. Statistically significant associations were found between TDI and increased overjet [OR = 2.24, 95 CI = 1.11-
4.55] and anterior crossbite [OR = 0.38, 95 CI=0.17-0.87]. No statistically significant associations were found between
TDI and number of people in the household, family income, social vulnerability, parents/caregivers' schooling, lip
competence, overbite, anterior open bite and dental caries (p>0.05).
The prevalence of TDI was high and
enamel fracture was the most common sign of TDI. Children with an increased overjet suffer more TDIs. Socioeconomic
factors had no influence over the prevalence of TDI.
Vol.11 – n.2/2010
Harvard: C. M. Viegas, A. C. Scarpelli, A. C. Carvalho, F. M. Ferreira, I. A. Pordeus, S. M. Paiva (2010) "Predisposing factors for traumatic dental injuries in brazilian preschool children", European Journal of Paediatric Dentistry, 11(2), pp59-65. doi:
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