title: Relation of traumatized permanent anterior teeth to occlusion and lip condition.
abstract: A comparative epidemiologic study on traumatized permanent anterior teeth was conducted on 6090 Iraqi and 3507 Sudanese primary schoolchildren. A significant relationship was found between the severity of trauma to protrusion of maxillary incisors and amount of lip coverage in Iraqis and a similar tendency was observed for the Sudanese. In a comparison between the two population groups the frequency of traumatized permanent maxillary incisors with greater tooth loss (types 3 + 4) were significantly higher in Iraqi than in Sudanese children with protrusion and inadequate lip coverage.
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D007180:Incisor / Q000293:injuries*; D007493:Iraq; D008046:Lip / Q000033:anatomy & histology*; D008297:Male; D008310:Malocclusion / Q000150:complications* / Q000473:pathology; D008437:Maxilla; D013397:Sudan; D014082:Tooth Fractures / Q000209:etiology*