ABSTRACT
O objetivo deste artigo foi descrever a técnica do assentamento passivo para confecção da estrutura metálica de próteses híbridas, por meio do relato de um caso clínico com acompanhamento em longo prazo. Paciente do sexo masculino, 44 anos, compareceu à clínica de Implantodontia do Instituto Latino Americano de Pesquisa e Ensino Odontológico (Ilapeo) relatando insatisfação devido à instabilidade da prótese total inferior. Foi planejada e executada a reabilitação do paciente com a instalação de cinco implantes entre os forâmenes mentuais, e uma prótese híbrida no sistema de carga imediata. O procedimento cirúrgico e a instalação da prótese definitiva foram realizados no mesmo dia. A agilidade de entrega da prótese foi possível devido à técnica utilizada para a confecção da estrutura metálica, denominada técnica do assentamento passivo, a qual elimina a necessidade de prova e solda da estrutura. A prótese permanece com a caraterística de reversibilidade, por ser parafusada, mas com a passividade das próteses cimentadas. O paciente foi acompanhado durante cinco anos e oito meses, não apresentou complicação e está totalmente satisfeito com o tratamento. Concluiu-se que a técnica do assentamento passivo reduz o tempo clínico e simplifica as etapas laboratoriais. Além disso, garante um adequado ajuste entre implante e prótese, favorecendo a longevidade da reabilitação.
The aim of this article was to describe the passive fit technique for the framework fabrication of hybrid prostheses through a clinical case presentation. A female, 44 years-old patient was examined at the Ilapeo clinics concerning about the instability of her lower mandibular denture. Five implants were planned and placed between the mental foramina to receive the mandibular hybrid prosthesis under immediate loading. The surgical and prosthodontic procedures were performed in the same day. This quick procedure to fabricate the metallic framework is known as the passive fit technique, which eliminates the try-in and soldering. Its retrievability is maintained, but with the advantage of a passive, cemented prosthesis. The patient has been followed-up for 5 years and 8 months, with no complications identifi ed, being completely satisfi ed with the proposed treatment. Besides, an adequate fit between the dental implants and the prosthesis is warranted, which favors the longevity of this rehabilitation procedure.
Subject(s)
Humans , Male , Adult , Dental Implants , Dental Prosthesis, Implant-Supported , Denture, Complete, Lower , Denture, Complete, Upper , Denture, Overlay , Immediate Dental Implant LoadingABSTRACT
Aim: The aim of this study was to evaluate the effect of indirect restorative materials (IRMs) and light-curing units (LCUs) on the micro hardness of dual-cured resin cement. Materials and Methods: A total of 36 cylindrical samples (2 mm thick) were prepared with dual-cured resin cement (Relyx ARC) photo-activated with either a QTH (Optilight Plus) for 40s or a LED (Radii) light-curing unit for 65s. Photo-activation was performed through the 2-mm- thick IRMs and the samples were divided into six groups (n=6) according to the combination of veneering materials (without, ceramic and indirect resin) and LCUs (QTH and LED). In the control group, the samples were light-cured with a QTH unit without the interposition of any restorative material. Vickers micro hardness test was performed on the top and bottom surfaces of each sample (load of 50 g for 15 secs). The data were statistically analyzed using a three-way ANOVA followed by Tukey x s post-hoc test ( P < 0.05). Results: There were no statistically significant differences on the top surface between the light curing-units ( P > 0.05); however, the LED provided greater hardness on the bottom surface when a ceramic material was used ( P < 0.05). The mean hardness in photo-activated samples, in which there was no interposition of indirect materials, was significantly greater ( P < 0.01). Conclusions: It may be concluded that the interposition of the restorative material decreased the micro hardness in the deeper cement layer. Such decrease, however, was lower when the ceramic was interposed and the cement light-cured with LED.