Alterações tridimensionais dos arcos dentários de pacientes submetidos à cirurgia ortognática
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Data
2008-08-01
Autores
Peixoto, Adriano Porto [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O tratamento ortodôntico-cirúrgico pode levar a mudanças dimensionais dos arcos dentários nos períodos pré e pós-cirúrgico. Existem poucos estudos bem formulados que procuraram avaliar as mudanças pré e pós-cirúrgicas nas dimensões dos arcos dentários e sua correlação com a estabilidade. Tais mudanças, somente podem ser corretamente avaliadas através de ferramentas tridimensionais. Modelos de gesso dos arcos dentário superior e inferior de pacientes submetidos a tratamento ortodôntico-cirúrgico para a correção das más oclusões esqueléticas de Classe II e classe III foram obtidos em três diferentes tempos: (T1) modelos iniciais, (T2) modelos pré-cirúrgicos imediatos (de 1 a 15 dias antes da cirurgia) e (T3) modelos pós-cirúrgicos (mínimo de 6 meses após a remoção do aparelho ortodôntico). Pontos previamente demarcados, foram digitalizados através do digitalizador tridimensional MicroScribe-3DX, cujas coordenadas armazenadas em planilhas do programa Excel possibilitaram avaliar a largura, o comprimento e a profundidade dos arcos dentários. Os resultados demonstraram para a classe II, que durante o preparo ortodôntico, houve aumentos nas distâncias transversais superiores e inferiores medidas na região de pré-molares que se mantiveram no período total de acompanhamento. Apenas a distância inter-caninos superior, apresentou alterações de aumento durante o preparo ortodôntico. Não foram observadas alterações sagitais ou verticais durante os períodos de observação. Diferentemente para a classe III, apenas o arco dentário superior sofreu expansão transversal na região de caninos e pré-molares durante o preparo ortodôntico pré-cirúrgico com tendência à inclinação vestibular dos dentes posteriores. Após a cirurgia, as dimensões transversais não foram afetadas. O arco dentário inferior sofreu poucas influências...
Surgical orthodontics treatment may induce pre-surgical and post-surgical dental arch changes. There are very few well designed investigations to evaluate pre surgical and post surgical dental arch changes and their connection to stability. Dental arch changes can be properly evaluated only by tridimensional tools. Dental casts of upper and lower dental arches from patients who were under orthodontic-surgical treatment to correct classes II and class III skeletal malocclusion were obtained in three phases: (T1) initial models, (T2) immediate pre-surgical models (from 1 to 15 days before surgery) and (T3) post-surgical models (at least 6 months after orthodontic appliance removal). Pre-marked points were digitalized by tridimensional MicroScribe-3DX digitizer. The coordinates kept in Excel tables, enabled to evaluate width, length and depth of the dental arches. The class II malocclusion sample showed upper and lower inter pre-molar and upper intercanines width increase with tendency to buccal inclination during pre surgical orthodontics that remained stable during the entire follow-up. No sagital nor vertical alterations were observed during all evaluated phases. Differently for class III, only upper dental arch suffered transversal expansion on canines and pre-molars regions during orthodontic pre-surgical treatment with tendency to buccal inclination from all of posterior teeth. After surgery, transversal dimensions were not affected. Lower dental arch suffered few changes by orthodontic pre-surgical treatment. When all phases were evaluated, raises on transversal dimensions from second molars and first pre-molars were observed. No sagital nor vertical alterations were observed during observation phases. It was concluded that pre-surgical orthodontics impacts mainly on upper and lower dental arch width between canines... (Complete abstract click electronic access below)
Surgical orthodontics treatment may induce pre-surgical and post-surgical dental arch changes. There are very few well designed investigations to evaluate pre surgical and post surgical dental arch changes and their connection to stability. Dental arch changes can be properly evaluated only by tridimensional tools. Dental casts of upper and lower dental arches from patients who were under orthodontic-surgical treatment to correct classes II and class III skeletal malocclusion were obtained in three phases: (T1) initial models, (T2) immediate pre-surgical models (from 1 to 15 days before surgery) and (T3) post-surgical models (at least 6 months after orthodontic appliance removal). Pre-marked points were digitalized by tridimensional MicroScribe-3DX digitizer. The coordinates kept in Excel tables, enabled to evaluate width, length and depth of the dental arches. The class II malocclusion sample showed upper and lower inter pre-molar and upper intercanines width increase with tendency to buccal inclination during pre surgical orthodontics that remained stable during the entire follow-up. No sagital nor vertical alterations were observed during all evaluated phases. Differently for class III, only upper dental arch suffered transversal expansion on canines and pre-molars regions during orthodontic pre-surgical treatment with tendency to buccal inclination from all of posterior teeth. After surgery, transversal dimensions were not affected. Lower dental arch suffered few changes by orthodontic pre-surgical treatment. When all phases were evaluated, raises on transversal dimensions from second molars and first pre-molars were observed. No sagital nor vertical alterations were observed during observation phases. It was concluded that pre-surgical orthodontics impacts mainly on upper and lower dental arch width between canines... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Ortodontia corretiva, Maloclusão, Cirurgia bucal, Modelos dentários, Orthodontics, Oral surgery, Malocclusion, Dental models
Como citar
PEIXOTO, Adriano Porto. Alterações tridimensionais dos arcos dentários de pacientes submetidos à cirurgia ortognática. 2008. 136 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Odontologia de Araraquara, 2008.