RESUMO
OBJECTIVES: The aim of the present study was to evaluate DNA damage (micronucleus) and cellular death (pyknosis, karyolysis and karyorrhexis) in exfoliated buccal mucosa cells from individuals following radiography. METHODS: Lateral and frontal cephalometric X-ray and panoramic dental X-rays were taken of a total of 18 healthy patients (6 male and 12 female) referred for orthodontic therapy. Exfoliated oral mucosa cells were collected immediately before X-ray exposure and after 10 days. RESULTS: The results revealed no statistically significant difference (P > 0.05) in the frequency micronucleated oral mucosa cells after X-ray exposure. However, X-ray was able to increase other nuclear alterations closely related to cytotoxicity, such as karyorrhexis, pyknosis and karyolysis. CONCLUSIONS: Data indicated that exposure to certain radiography may not be a factor in inducing chromosomal damage, but it does promote cytotoxicity.
Assuntos
Cefalometria/efeitos adversos , Dano ao DNA , Mucosa Bucal/efeitos da radiação , Ortodontia , Radiografia Panorâmica/efeitos adversos , Adolescente , Cromossomos/efeitos da radiação , Células Epiteliais/efeitos da radiação , Feminino , Humanos , Masculino , Testes para Micronúcleos , Mucosa Bucal/citologiaRESUMO
Objetivo: verificar a relação entre os diastemas e os tipos faciais. Métodos: pesquisa retrospectiva, por meio de análise de prontuários, de sujeitos de ambos os gêneros, entre 14 e 44 anos, nas cidades de Maceió e de Salvador, no período de 1999 a 2005, considerando: gênero, tipos faciais, idade, localização e presença de diastemas. Resultados: houve uma diferença significante entre a presença de diastema de acordo com o padrão facial, como também entre sua localização na arcada inferior ea faixa etária analisada. Conclusão: existiu significância estatística entre a presença de diastemas na arcada inferior e os padrões mesofacial e braquifacial, na faixa etária entre 14 e 34 anos.
Purpose: to verify the association between diastemas and facial types. Methods: retrospective research,with medical records analysis of people of both genders, between 14 and 44-year old, in Maceió and Salvador, from 1999 to 2005, considering gender, facial types, age, localization and diastema presence. Results: there was a significant difference between the presence of diastema according to the facial patterns, and also between its localization in the inferior arches and age range. Conclusion: there wasassociation between the occurrence of diastema in the inferior arches, and the mesofacial and braquifacial patterns, for the age range between 14 and 34-year old.