RESUMO
Four-unit fixed partial dentures were fabricated as a one-piece casting or as two-piece castings joined by soldering prior to the addition of porcelain. The accuracy of the two techniques was compared and evaluated using an anatomic cast-metal master model. All procedures, including SEM measurements, were performed directly on the master model. The cast one-piece units had smaller vertical marginal openings than did the soldered units. The rigid nature of the abutments evokes the problems occurring with osseointegrated implants.
Assuntos
Técnica de Fundição Odontológica , Soldagem em Odontologia , Planejamento de Dentadura/métodos , Prótese Parcial Fixa , Análise de Variância , Microscopia Eletrônica de Varredura , Modelos Dentários , Reprodutibilidade dos Testes , Propriedades de SuperfícieRESUMO
Controversy exists concerning marginal adaptation of multiple-unit fixed partial dentures with respect to whether the restoration is cast as a single unit or formed in sections and soldered. This study focused on the question in a laboratory simulation and it was found that one piece castings are superior in marginal adaptation.