Análise cefalométrica da imagem digital em uma telerradiografia frontal para diagnosticar a origem da assimetria mandibular em indivíduos com maloclusão de Classe II, subdivisão. / Cephalometric analysi of digital image on a frontal telerradiography to diagnose the origin the mandibular asymmetry in individuals with Class II subdivision malocclusion

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

24/06/2009

RESUMO

Purpose: To investigate the mandibular asymmetry cause of an individual with Class II subdivision malocclusion, through a cephalometric analysis made on frontal digital teleradiography. The aim was also to provide, through the results of cephalometric analysis, subsidies to the professionals to a better diagnosis and treatment plan of patients with Class II subdivision malocclusion. Methods: The sample consisted of 30 individuals presenting Class II subdivision malocclusion. Frontal digital teleradiographies were performed and five main points were demarcated (17 - center point on top of the head of left condyle, 28 - center point on top of the head of right condyle, 23 - the deepest point in the right antegonial notch, 21 - deepest point on the left antegonial notch, and 22 - lower point in the mandibular symphysis). Sixteen secondary points were used in the cephalometric analysis. A digital system (Radiocef 4.9) was used to point assessment, which determined the lines, plans and measures necessary to verify the origin of mandibular asymmetry present in an individual with a Class II subdivision malocclusion. Results: The results showed that there is a greater tendency of mandibular asymmetry of dental cause in malocclusion subdivision Class II conditions, however the orthodontist should give special attention to the sides of the base of the mandible, since the results found in this cephalometric study showed a greater linear difference comparing one against another attempting to a possible skeletal cause of mandibular asymmetry. Conclusions: The cephalometric analysis used in this study confirmed the clinical need for diagnosis and orthodontic treatment plan for individuals with Class II subdivision malocclusion, it is a simplified method that induces the professional to use complementary tests (clinical and photographic examination, analysis of models and CT) in cases where the cephalometric results showed a trend of a mandibular asymmetry of skeletal cause, since in most cases of malocclusion division Class II the individual is treated as if the mandibular asymmetry was always of dental cause.

ASSUNTO(S)

1. má oclusão de angle classe ii. 2. assimetria facial. 3. cefalometria. 4. tratamento. radiologia odontologica

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