Aim. This study evaluated the behavior of oral epithelial cells in contact with orthodontic appliances. Methods. Oral epithelial cells of clinically normal buccal mucosa were obtained by liquid-based exfoliative cytology from 22 orthodontic patients. The following regions were evaluated: a) oral mucosa exposed to friction from orthodontic brackets; b) oral mucosa exposed to friction from the tube on the orthodontic band, and c) oral mucosa not exposed to friction (control area). Nuclear (NA) and cytoplasmic (CA) areas and NA/CA ratio were assessed by an image analysis system. Cell morphology and cellularity were also analyzed by Papanicolaou technique.Results. The NA of the cells in contact with orthodontic brackets and bands were smaller than the control area. Cells in contact with the brackets showed the greatest reduction in CA in comparison with the cells subjected to friction from the tube, and the control group. Smears classified as type I predominated in all regions analyzed, although type II were predominant, together with superficial epithelial cells, mainly in the oral mucosa in contact with the band tube.Conclusion. Preclinical alterations in the epithelial cells of oral mucosa, caused by orthodontic appliances, are reduction in NA, increase in cell keratinization and inflammatory features, especially in the band tube area.
A reabsorção radicular externa é uma das lesões mais comumente encontradas durante um tratamento ortodôntico. Muitos são os fatores envolvidos no desenvolvimento dessa lesão. Neste trabalho foi realizada uma breve revisão de literatura sobre o processo de reabsorção radicular, os tipos de movimentos ortodônticos e os fatores biológicos associados.
A Síndrome de Turner (ST) foi descrita primeiramente por Ulrich e Turner em 1938, e representa uma das mais freqüentes aberrações cromossômicas. É caracterizada pela presença de apenas um cromossomo X funcional. O outro cromossomo sexual é inexistente ou anormal (LOPEZ et aI., 2002) 5 . O cariótipo mais comum é o 45,X, que está presente em 40% a 60% das pacientes com esta patologia. As características dessa síndrome são disgenesia gonadal, atraso no desenvolvimento puberal, amenorréia primária, esterilidade, peito largo, pescoço curto e/ou alado, cubitus valgus, mordida aberta anterior, diminuição do comprimento das raízes de pré-molares, entre outras. O presente artigo trata-se de um relato de caso clínico de uma paciente com Síndrome de Turner atendida na Disciplina de Semiologia Aplicada na Universidade Federal do Paraná e das implicações desta síndrome sobre a saúde bucal e, também, a importância de um tratamento profilático adequado.Palavras-chave: Odontologia; Síndrome de Turner.
ABSTRACTThe Turner's Syndrome (TS) was firstly described by Ulrich and Turner on 1938, and represents one of the most frequently chromosomic aberrations. lt's characterized by the presence of only one functional X chromosome. The other Revista Dens
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