Análise radiográfica computadorizada da reabsorção radicular apical após a utilização de duas mecânicas ortodônticas
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Data
2007-02-01
Autores
Santos, Eduardo Cesar Almada [UNESP]
Lara, Tulio Silva [UNESP]
Arantes, Flávia de Moraes [UNESP]
Coclete, Gilberto Aparecido [UNESP]
Silva, Ricardo Santos [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Dental Press Editora
Resumo
OBJETIVO: a reabsorção radicular apical é uma condição comumente observada durante e após o tratamento ortodôntico e fatores como tipo de aparelhagem ortodôntica utilizada, magnitude das forças aplicadas e duração do tratamento podem estar relacionados ao processo de arredondamento do ápice radicular. Buscou-se avaliar, por meio de imagens radiográficas computadorizadas, a quantidade de reabsorção no ápice radicular, quando da utilização de duas diferentes técnicas de mecânica ortodôntica fixa: Edgewise com acessórios padrão e Edgewise com acessórios totalmente programados. METODOLOGIA: a amostra constituiu-se de 20 pacientes tratados pelo mesmo profissional na Clínica de Ortodontia da Faculdade de Odontologia de Araçatuba - UNESP. Os pacientes foram divididos em dois grupos: grupo 1 (Tratados com Edgewise com acessórios padrão e fios de aço) e grupo 2 (Tratados com Edgewise com acessórios totalmente programados e fios de níquel-titânio). A avaliação radiográfica digital foi realizada por um único operador por meio de exposições radiográficas digitais feitas no início do tratamento ortodôntico, após retração de caninos e final de tratamento, utilizando o sistema de escores proposto por Levander e Malmgren (1988). RESULTADOS E CONCLUSÕES: a análise dos escores permitiu concluir que o tratamento ortodôntico empregando a técnica Edgewise com acessórios totalmente programados e fios de níquel-titânio apresentou menores graus de reabsorção radicular apical, em comparação à técnica Edgewise com acessórios padrão e fios de aço. Observou-se que, independentemente da técnica empregada, o tratamento ortodôntico como um todo apresentou um grau moderado de reabsorção radicular apical.
AIM: external apical root resorption is frequently observed during and after orthodontic treatment and can be related to factors such as mechanical factors, magnitude of forces and treatment time with fixed appliances. This study investigated by means of computerized radiographs the amount of root resorption after orthodontic treatment with two different fixed appliance techniques: standard Edgewise technique and Straight-wire system. METHODS: the sample was comprised of 20 patients treated by the same orthodontist at the Orthodontic Clinic of Araçatuba Dental School, University of São Paulo State - UNESP. The patients were divided into two groups: group 1 (treated with standard Edgewise technique and stainless steel wires) and group 2 (treated with Straight-wire system and nickel-titanium alloys). The computerized evaluation was performed by only one examiner using Levander and Malmgren s score system (1988) in the radiographs obtained at the beginning of the orthodontic treatment, after canine retraction and at the end of treatment. RESULTS and CONCLUSIONS: external apical root resorption in patients treated with Straight-wire system and nickel-titanium alloy was lesser than in patients treated by standard Edgewise technique and stainless steel wires. However, all patients presented moderate external apical root resorption regardless of the fixed appliance technique.
AIM: external apical root resorption is frequently observed during and after orthodontic treatment and can be related to factors such as mechanical factors, magnitude of forces and treatment time with fixed appliances. This study investigated by means of computerized radiographs the amount of root resorption after orthodontic treatment with two different fixed appliance techniques: standard Edgewise technique and Straight-wire system. METHODS: the sample was comprised of 20 patients treated by the same orthodontist at the Orthodontic Clinic of Araçatuba Dental School, University of São Paulo State - UNESP. The patients were divided into two groups: group 1 (treated with standard Edgewise technique and stainless steel wires) and group 2 (treated with Straight-wire system and nickel-titanium alloys). The computerized evaluation was performed by only one examiner using Levander and Malmgren s score system (1988) in the radiographs obtained at the beginning of the orthodontic treatment, after canine retraction and at the end of treatment. RESULTS and CONCLUSIONS: external apical root resorption in patients treated with Straight-wire system and nickel-titanium alloy was lesser than in patients treated by standard Edgewise technique and stainless steel wires. However, all patients presented moderate external apical root resorption regardless of the fixed appliance technique.
Descrição
Palavras-chave
Ortodontia corretiva, Reabsorção da raiz, Interpretação de imagem assistida por computador, Corrective Orthodontics, Root resorption, Computer-assisted image interpretation
Como citar
Revista Dental Press de Ortodontia e Ortopedia Facial. Dental Press Editora, v. 12, n. 1, p. 48-55, 2007.