Aesthetic all-ceramic restorations: CAD-CAM system / Restauraciones estéticas de porcelana pura: sistemas de CAD-CAM

Aesthetic dentistry is dedicated to imitate nature by maintaining the size, shape, color and symmetry. Technology has developed metal-free ceramic materials so capable of reproducing a natural appearance, that traditional materials have been replaced by them. The yttrium partially-stabilized zirconium oxide does not only have the advantage of being extremely resistant, but it is also highly translucent. It has a translucency that allows about 50 percent of the incident light to pass through, a characteristic that is vital for providing a more natural appearance to restorations. The duration of scanning and milling procedures will depend on the size of the object, the number of objects processed and the steps selected (CAM or CAD/CAM). The framework of the densely sintered zirconium oxide with its precise fit is veneered with the veneering ceramic developed especially for this purpose. Almost in all cases, there are several treatment alternatives for the same diagnosis. The success of these restorations will be predicted as long as it is founded on sustaining biological principles. The aim of this paper is to concisely present the sequences for a clinical treatment in a schematic and illustrative manner.

La estética en odontología está orientada a imitar la naturaleza, a tratar de conservar las proporciones, las formas, el color, la simetría. La tecnología ha desarrollado materiales cerámicos libres de metal que han reemplazado a los materiales tradicionales, capaces de imitar mejor a la naturaleza. El óxido de circonio parcialmente estabilizado con itrio, no solo es extremadamente resistente, sino que posee la ventaja de ser altamente translucido. Su translucidez de aproximadamente el 50 por ciento de la luz incidente, permite la elaboración de restauraciones con apariencia natural. La duración del proceso de escaneado y fresado dependerá del tamaño del objeto, del número de objetos procesados y de los pasos seleccionados (CAM o CAD/CAM). La estructura de óxido de circonio densamente sinterizado con su preciso ajuste, se cubre con la cerámica de recubrimiento que ha sido especialmente desarrollada para este propósito. En casi todos los casos que se nos plantean hay un solo diagnóstico, pero distintas alternativas de plantear el tratamiento. El éxito de estas restauraciones será predecible siempre que sefundamente en el conocimiento de los principios biológicos que la sustentan. El objetivo de este artículo es exponer de manera concisa las bases teóricas a modo esquemático y las imágenes de la secuencia del tratamiento clínico.

Rehabilitación estética por medio de facetas directas-presentación de casos clínicos / Aesthetic rehabilitation through direct facets - report of cases

En la actualidad, la sociedad prácticamente exige una uniformidad de las características relacionadas con la apariencia física de las personas, lo que hace aumentar la búsqueda por los tratamientos que proporcionen un aspecto más agradable, vinculado a técnicas eficientes y seguras. Las alteraciones dentarias de color, de forma, textura y/o posición contribuyen de modo desfavorable, principalmente en los dientes anteriores, para una armonía facial. El uso de las facetas estéticas, directamente en la boca, es cada vez más enfatizado debido a evolución de los materiales restauradores y de la técnica adhesiva, ofreciendo una mejor relación costo/beneficio para el paciente. El objetivo del presente artículo es presentar casos clínicos en los cuales el tratamiento con facetas directas es una alternativa de tratamiento eficaz, reversible y de fácil realización.

At present, society practically demands uniformity of features in relation to physical appearance, resulting in an increasing number of persons seeking treatment that will provide them with a more pleasant visual appearance, linked to efficient and safe techniques. Alterations in tooth shade, shape, texture and/or position, particularly of anterior teeth, contribute unfavorably to facial harmony. Aesthetic facets placed directly in the mouth have been increasingly emphasized, due to the development of restorative materials and adhesive techniques, offering the patient an even better cost/benefit ratio. The aim of this article is to present clinical cases in which the direct facet was shown to be an efficient, reversible and easy to perform alternative treatment.

Aplicação clínica das resinas de nanotecnologia / Nanotechnology resins clinical application

A aparência do sorriso tem grande impacto na vida dos indivíduos, afetando desde o convívio social até relações profissionais. Assim a Odontologia Estética, com o passar do tempo, tem evoluído em busca de materiais e técnicas restauradoras que mimetizem o aspecto natural dos elementos dentários. Um dos saltos qualitativos foi conseguido com o emprego da nanotecnologia aos compósitos restauradores que possibilitou o surgimento das resinas com nanopartículas. Atualmente os materiais "nano" vem despontando no mercado, graças ao marketing das partículas nanométricas, relacionando-as com os resultados obtidos em testes laboratoriais. Entretanto será que estes compósitos são a única ou melhor escolha para procedimentos restaraudores estéticos anteriores? O presente trabalho tem o objetivo de abordar o atual estágio das resinas compostas para a realização de restauraçõesestéticas em dentes anteriores, ressaltando o desempenho dos compósitos em pesquisas, bem como a influências destas no restabelecimento morfo-estético-funcional dos elementos anteriores, como também, apresentar um caso clínico de fechamento diastema anterior mediano, onde a técnica restauradora direta foi realizada como alternativa ao tratamento ortodôntico.

The smile appearence has a great impact on people's lives, affecting not only social life but also professional relationships. Therefore the aesthetic dentistry, along the years, has developed a lot through the research for materials and restorative tecchniques that copy the natural aspect of the human teeth. One of the biggest leaps was achieved through the union of nanotechnology and restorative composites, what has made possible the appearing of the nanofil composite resins. Nowadays these new materials have been arising in the dental market, thanks to the nanocomposites, relating them to the results obtained in laboratorial tests. However, will these composites be the best alternative to aesthetic restorative procedures? The aim of this study is to approach the resin's present situation for the achievement of aesthetic restorations in anterior teeth, standig out the composite's performance through researches, as well as the influence they have upon the morpho-aesthetic-functional anterior teeth's re-establishment. Also, in this study we present an anterior diastema closure case report, in which the direct restorative technique was used as an alternative to the orthodontic treatment.