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Classe II divisão 2 - biótipo facial e padrão de crescimento esquelético segundo análise geométrica: estudo científico
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Abstract(s)
Edward H. Angle desenvolveu um sistema de classificações dentárias quanto á posição ântero-posterior dos caninos e molares permanentes maxilares, Angle sugeriu ainda uma divisão da classe II quanto á posição do setor anterior. A classe II divisão 2 tem uma prevalência relativamente baixa na população ortodôntica, e o seu tratamento constitui um verdadeiro desafio para os ortodontistas.
Objetivos: O presente estudo procura classificar a classe II divisão 2 dentária quanto ao seu biótipo facial e divergência esquelética.
Métodos: Foram selecionadas 200 telerradiografias de perfil onde havia sido efetuada a análise cefalométrica AGIHF por um ortodontista experiente. Apenas 9 corresponderam a Classe II divisão 2 de Angle diagnosticada clinicamente, com o desenvolvimento craniofacial já concluído.
Resultados: Os resultados foram obtidos por meio de cálculo das percentagens para as varáveis qualitativas: género, tipo facial, discrepância esquelética e padrão de crescimento vertical facial.
Conclusões: Embora tenha sido confirmada a tendência para esta subdivisão desenvolver um padrão esquelético de Classe II e um Biótipo Braquifacial, demonstrou-se adequado associá-la a várias possibilidades de desenvolvimento craniofacial.
A controvérsia na classificação e caracterização desta classe persiste em constituir um desafio para os ortodontistas e um estímulo para as investigações futuras.
Edward H. Angle developed a dental classification system for the anteroposterior position of the permanent maxillary canines and molars. Angle also suggested a division of Class II regarding the position of the anterior teeth. Class II division 2 has a relatively low prevalence in the orthodontic population, and its treatment is a real challenge for orthodontists. Objectives: The present study aims to classify class II dental division 2 as to its facial biotype and skeletal divergence. Methods: 200 profile cephalograms were selected where had been carried out AGIHF analysis by an experienced orthodontist. Only 9 corresponded to Class II division 2 of Angle diagnosed clinically, with craniofacial development already completed. Results: The results were obtained by calculating the percentages for the qualitative variables: gender, facial type, skeletal discrepancy and facial vertical growth pattern. Conclusions: Although the tendency for this subdivision to develop a Class II skeletal pattern and a Brachyfacial biotype has been confirmed, it has been found appropriate to associate it with various possibilities of craniofacial development. The controversy in the classification and characterization of this class remains a challenge for orthodontists and a stimulus for future research.
Edward H. Angle developed a dental classification system for the anteroposterior position of the permanent maxillary canines and molars. Angle also suggested a division of Class II regarding the position of the anterior teeth. Class II division 2 has a relatively low prevalence in the orthodontic population, and its treatment is a real challenge for orthodontists. Objectives: The present study aims to classify class II dental division 2 as to its facial biotype and skeletal divergence. Methods: 200 profile cephalograms were selected where had been carried out AGIHF analysis by an experienced orthodontist. Only 9 corresponded to Class II division 2 of Angle diagnosed clinically, with craniofacial development already completed. Results: The results were obtained by calculating the percentages for the qualitative variables: gender, facial type, skeletal discrepancy and facial vertical growth pattern. Conclusions: Although the tendency for this subdivision to develop a Class II skeletal pattern and a Brachyfacial biotype has been confirmed, it has been found appropriate to associate it with various possibilities of craniofacial development. The controversy in the classification and characterization of this class remains a challenge for orthodontists and a stimulus for future research.
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Keywords
Classe ii má oclusão Classe ii divisão 2 Biótipo facial Hipodivergência Hiperdivergência Discrepância esquelética Class ii malocclusion Class ii division 2 Facial biotype Hipodivergence Hiperdivergence Skeletal discrepancy