Dental trauma in schoolchildren six to twelve years of age.

The prevalence of dental injuries in Spanish children living in an urban area was studied in 4000 schoolchildren ages six to twelve years. A total of 227 children experienced dental injuries. Simple enamel fracture was the predominant injury (46.2 percent). Boys showed a higher prevalence than girls In the majority of cases (74.9 percent), the trauma affected one tooth only. The maxillary central incisor was the most frequently affected tooth (87.9 percent). The most common fracture site was the mesioincisal angle (40.6 percent) followed by distoincisal angle (27.3 percent). Twenty-four percent of the children with dental injuries had an overjet of more than 3 mm.