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1.
Ortho Sci., Orthod. sci. pract ; 10(39): 234-243, 2017. ilus, graf
Article in Portuguese | LILACS, BBO | ID: biblio-868272

ABSTRACT

O objetivo básico do tratamento de Ortodontia é restaurar a harmonia do esqueleto maxilo-facial através do controle da dimensão vertical e do plano oclusal. O método multi-bráquetes, amplamente usado na terapia ortodôntica, permite o controle tridimensional dos dentes. Durante muito tempo os ortodontistas não aproveitaram esse controle, concentrando-se apenas no movimento mesio-distal, uma vez que a principal técnica para alinhar e melhorar o perfil do paciente era movendo os caninos distalmente, permitindo em seguida a retração dos incisivos. Em 1967, Dr. Young Kim, em Boston, reconheceu a importância da verticalização do eixo dos dentes, do controle vertical e introduziu os "Multiloop Edgewise Arch Wire" (MEAW). Nos anos 80, Dr. Sadao Sato, no Japão, propôs novas ideias para esses arcos, usando-os para diferentes tipos de más oclusões, controlando a dimensão vertical e alterando a inclinação do plano oclusal com notável êxito. Apesar da eficiência biomecânica dos Arcos MEAW, eles demandam muito trabalho, pois são várias dobras complicadas e, para tanto, requerem uma formação específica da técnica. Outro inconveniente desses arcos é o seu volume na boca do paciente, o que dificulta a higiene e também é antiestético. Todos esses fatores têm dificultado a expansão da técnica MEAW, no entanto, foi encontrada uma maneira de mudar a reduzida constante elástica dos arcos MEAW, os quais são feitos com fio Elgilloy 0.16" x 0.22", utilizando um fio estruturado mais simples. Recentemente, foi introduzida no mercado uma nova liga chamada GUMMETAL. As características do GUMMETAL estão perfeitamente adequadas para superar todos os inconvenientes dos arcos MEAW, mencionados anteriormente.(AU)


The basic goal of orthodontic treatment is to restore the harmony of the maxillofacial skeleton by controlling the vertical dimension and the occlusal plane. The multi-bracket method, widely used in orthodontic therapy, allows three-dimensional control of teeth. For a long time, orthodontists did not take advantage of this control, concentrating only on the mesio-distal movement, since the main technique to align and improve the patient's profile was to move the canines distally, allowing the incisors to retract. In 1967, Dr. Young Kim, in Boston, recognized the importance of vertical axis of the teeth, the vertical control and introduced the Multiloop Edgewise Arch Wire (MEAW). In 1980, Dr. Sadao Sato, in Japan, proposed new ideas for these arches, using them for different types of malocclusions, controlling the vertical dimension and changing the inclination of occlusal plane with remarkable success. Despite the biomechanical efficiency of the MEAW arches, they require a lot of work, as they are several complicated folds and, for that, requires a specific technique training. Another drawback of these arches is the volume in the patient's mouth, which makes hygiene difficult and is also anti-aesthetic. All these factors have made it difficult to expand the MEAW technique, however, a way has been found to change the reduced elastic constant of the MEAW arches, which are made with Elgilloy .016x.022" wire, using a simpler structured wire. Recently, a new alloy called GUMMETAL was introduced in the market. The characteristics of GUMMETAL are perfectly suited to overcome all the drawbacks of the MEAW arches mentioned above.(AU)


Subject(s)
Humans , Female , Adolescent , Dental Occlusion , Orthodontics , Vertical Dimension
2.
Int. j. odontostomatol. (Print) ; 2(1): 109-118, jul. 2008. ilus
Article in Spanish | LILACS | ID: lil-545861

ABSTRACT

El tema de la extracción preventiva de los terceros molares, ha estado sometido durante mucho tiempo a un extenso debate. Son muchos los artículos basados en la evidencia, que apuntan a no considerar este procedimiento como una maniobra justificada, si no hay sintomatología que lo amerite. Los resultados de las investigaciones, concluyen especialmente que no hay evidencia que sustente que los terceros molares sean causantes de apiñamiento dentario tardío. Dichas investigaciones no han considerado sin embargo las investigaciones del Profesor Sadao Sato referidas al concepto de discrepancia posterior y los terceros molares, y su rol como factor etiopatogénico en el apiñamiento tardío, desarrollo de mordida abierta y recidiva post tratamiento de ortodoncia. En el presente artículo se desarrolla parte del debate y se presenta la filosofía MEAW – Multiloop Edgewise Arch Wire- como un efectivo método de tratamiento de las secuelas de Discrepancia Posterior.


The subject of the preventive extraction of third molars, has been under an extensive debate during long time. The articles based on the evidence are many, that aim not to consider this procedure like a justified maneuver, if there is no symptoms that justify it. The results of the investigations conclude specially that there is no evidence that it sustains those third molars is causes of delayed dental crowding. These investigations have not considered nevertheless the investigations of Professor Sadao Sato referred to the concept of posterior discrepancy and third molars, and it roll like etiopatologic factor in the delayed crowding, development of open bite and post orthodontic relapse. In the present article part of the debate is presented and it developed the MEAW philosophy - Multiloop Edgewise Arch Wire- like an effective method of treatment of the sequels of Posterior Discrepancy.


Subject(s)
Humans , Adolescent , Adult , Female , Tooth Extraction , Malocclusion/etiology , Malocclusion/therapy , Orthodontic Wires , Molar, Third/surgery
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