Avaliação da intrusão dos molares superiores pela técnica de ancoragem com miniplacas de titânio
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Data
2004-03-26
Autores
Nakao, Cecília Yuriko [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
A necessidade de recursos para o tratamento da mordida aberta anterior esquelética, em adultos, que apresentam excesso de erupção dentária posterior superior, a deficiência de dados literários e de estudos mais aprofundados sobre o tratamento deste tipo de problema originou o presente estudo.O propósito deste estudo foi o de avaliar o efeito da intrusão dos molares pela técnica de ancoragem com miniplacas de titânio. A amostra de estudo consistiu-se de telerradiografias em norma lateral e a 45 graus, de pacientes adultos com idade entre 13 anos e 5 meses a 29 anos e 8 meses. A seleção da amostra teve como critério de inclusão, pacientes com dentadura permanente, portadores de mordida aberta anterior de pelo menos 1,5 mm e extrusão dos dentes posteriores superiores. Os pacientes foram tratados com força intrusiva aplicada ao segmento posterior bilateralmente, utilizando elástico tissue guard apoiado do tubo do primeiro molar superior ao gancho da miniplaca de titânio. Este procedimento era iniciado quinze dias após a implantação das miniplacas no pilar zigomático da maxila e ativada a cada 15 a 20 dias pela troca do elástico com força de 450 g a 500 g, pelo período de 6 meses. Os dados do estudo mostraram evidências de intrusão verdadeira dos molares superiores com este tipo de tratamento. Pôde ser concluído que as miniplacas de titânio permanecem firmes e estáveis quando utilizadas como ancoragem ortodôntica fixa possibilitando uma intrusão real dos dentes posteriores de pacientes adultos, com resultante alteração na inclinação do plano oclusal no sentido horário e mandibular no sentido anti-horário além de diminuição da altura facial anterior.
The need of resources for the treatment of skeletal anterior open bite in adults with superior posterior dental eruption excess, the lack of information in the literature and elaborate studies about the technique originates this study. The aim of the study was to evaluate the effect of the upper molar intrusion by the titanium miniplates anchorage technique. The sample consisted of lateral and 45 cephalometric radiographs of patients between 13 years and 5 months to 29 years and 8 months of age. The inclusion criteria for selection of the sample was adult patients with permanent dentition, anterior open bite of at least 1,5 mm and extrusion of the posterior upper teeth. The patients were treated with an intrusion force applied to the posterior segment bilaterally by the means of tissue guard elastics tied to the tube of the upper first molars and to the miniplates hooks. This procedure was started fifteen days after the implantation of the miniplates and it was checked each 15 to 20 days for elastic change, with forces varying from 450 to 500 grams/side for six month period. The data collected in the study showed evidence of real upper molar intrusion with this kind of treatment. It was concluded that the titanium miniplates as used as orthodontic anchorage remained firm and stable allowing a real intrusion of the posterior teeth in adult patients, with a resulting change in the inclination of the occlusal plane in the clockwise direction, of the mandibular plane in the counterclockwise direction and in a decrease of the anterior facial height.
The need of resources for the treatment of skeletal anterior open bite in adults with superior posterior dental eruption excess, the lack of information in the literature and elaborate studies about the technique originates this study. The aim of the study was to evaluate the effect of the upper molar intrusion by the titanium miniplates anchorage technique. The sample consisted of lateral and 45 cephalometric radiographs of patients between 13 years and 5 months to 29 years and 8 months of age. The inclusion criteria for selection of the sample was adult patients with permanent dentition, anterior open bite of at least 1,5 mm and extrusion of the posterior upper teeth. The patients were treated with an intrusion force applied to the posterior segment bilaterally by the means of tissue guard elastics tied to the tube of the upper first molars and to the miniplates hooks. This procedure was started fifteen days after the implantation of the miniplates and it was checked each 15 to 20 days for elastic change, with forces varying from 450 to 500 grams/side for six month period. The data collected in the study showed evidence of real upper molar intrusion with this kind of treatment. It was concluded that the titanium miniplates as used as orthodontic anchorage remained firm and stable allowing a real intrusion of the posterior teeth in adult patients, with a resulting change in the inclination of the occlusal plane in the clockwise direction, of the mandibular plane in the counterclockwise direction and in a decrease of the anterior facial height.
Descrição
Palavras-chave
Movimentação dentária, Mordida aberta, Titânio - Miniplacas, Titanium plate miniplate, Open-bite, Tooth movement
Como citar
NAKAO, Cecília Yuriko. Avaliação da intrusão dos molares superiores pela técnica de ancoragem com miniplacas de titânio. 2004. 105 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Odontologia de Araraquara, 2004.