Objective: the aim of this article was to review the literature about the marginal and internal fit of CAD/CAM fabricated all-ceramic restorations. Material and Methods: a review of literature using Pubmed and Bireme database was executed and 37 articles in English and Portuguese were selected. The keywords were "Computer-Aided Design," "Dental marginal adaptation," "Dental restoration, permanent." Results: the results proved that this system can generate restorations with clinically acceptable marginal fit (≤100 µm). However, other parameters must be considered to achieve these results such as milling machine, bur diameter, software, design preparation, smooth preparation margins and incorporation of rounded line angles on the tooth preparation, learning curve of the operator and type of impression method. Conclusion: therefore, although some clinicians present concerns related to the internal fit of CAD/CAM system fabricated restorations, studies corroborate the success on the fit of these restorations, which justifies clinical use and indication of CAD/CAM system.
EditorialNo decorrer da história do Programa de Pós Graduação em Odontologia (Reabilitação Oral), o Curso de Verão vem promovendo as pesquisas desenvolvidas no Departamento de Materiais Dentários e Prótese, com o intuito de convidar a comunidade odontológica a fazer parte desse ambiente acadêmico. Sendo assim a comissão organizadora da XII Edição do Curso de Verão do Programa de Pós Graduação em Reabilitação Oral ofereceu aos seus participantes de diversos estados do país e de outros países uma gama de oportunidades dentro da Faculdade de Odontologia de Ribeirão Preto, com a sua grade cientifica voltada para pesquisas laboratoriais e clínicas, das quais diversos docentes da unidade expuseram as suas linhas de pesquisa.Essa edição do curso atingiu proporções inimagináveis, com altos números de inscrições, nunca obtido nas versões anteriores. Além disso o engajamento da comissão organizadora juntamente com a qualidade de material apresentado pelos palestrantes proporcionaram uma experiencia que tem sido avaliada pelos participantes como única e imensurável, concretizando ainda mais a existência do curso dentro do programa e aumentando a abrangência das nossas feitorias para a população.Assim, damos início a série de Anais do Curso de Verão, da qual essa é a segunda edição que possibilitou aos seus participantes apresentarem seus trabalhos, garantindo a troca de experiencias entre as diversas universidades. Além de agradecermos a participação de todos no evento, com muita responsabilidade, dedicação e carinho. Comissão OrganizadoraXII Curso de Verão do Programa de Pós Graduação em Reabilitação OralEdição 2020
Editorial No decorrer da história do Programa de Pós Graduação em Odontologia (Reabilitação Oral), da Faculdade de Odontologia de Ribeirão Preto, da Universidade de São Paulo, o Curso de Verão vem divulgando as atividades e linhas de pesquisas desenvolvidas pelo Programa e Departamento com o objetivo de incentivar a docência e pesquisa odontológica Brasileira. Contudo, devido a condição sanitária imposta pela pandemia do SARS-CoV-2, com a necessidade de isolamento social e a característica dos participantes do curso serem de diferentes regiões do Brasil e da América Latina, o curso que vinha sendo preparado com formato presencial, foi replanejado de forma que as atividades propostas pudessem ser realizadas de forma remota, à distância. Graças às tecnologias digitais e empenho da Comissão Organizadora da XIII Edição do Curso de Verão do Programa de Pós Graduação em Reabilitação Oral, o curso pode ser oferecido aos seus 80 participantes, de todos os estados do país e de outros países da américa latina, com uma programação científica que contou com a participação de docentes, pós-graduandos egressos do Programa e pós-graduandos da Unidade. O engajamento da comissão organizadora juntamente com a qualidade de material apresentado pelos palestrantes proporcionou uma experiencia única, concretizando ainda mais a existência do curso dentro do programa e aumentando a abrangência das nossas feitorias para a população. Ainda, graças à possibilidade ofertada aos participantes para apresentação de seus trabalhos e ao alto nível dos trabalhos selecionados, garantindo a troca de experiências entre as diversas universidades, apresentamos a terceira edição dos Anais do Curso de Verão. Certos de que o objetivo do Curso foi alcançado, mesmo frente aos desafios impostos pela Pandemia, agradecermos a participação de todos no evento, com muita responsabilidade, dedicação e carinho. Comissão Organizadora - XIII Curso de Verão do Programa de Pós Graduação em Reabilitação Oral/Edição Online
Carvalho BG. Effects of different surface treatments on bond strength and surface characteristics of zirconia ceramics [master's dissertation]. Ribeirão Preto: University of Sao Paulo, School of Dentistry of Ribeirão Preto; 2021.Zirconia ceramics are widely used in dentistry due to its excellence in esthetics, biocompatibility, and mechanical properties. However, the densely packed structure of zirconia crystals makes it difficult to ensure an efficient and durable chemical and mechanical bond to cementation systems. In order to enhance the bond strength, several methods and materials have been tested. The aim of this in vitro study was to assess the effects of a hydrofluoridric acid etching at an elevated temperature on yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramics in terms of bond strength and surface characteristcs and compare these results according to different surface treatment: tribochemical silica coating and alumina-particle air abrasion. Forty zirconia specimens were prepared and divided into four groups: 10 samples were hot-etched with 9% hidrofluoridric acid (group ZECS), 10 samples were treated with tribochemical silica coating (group ROC), 10 samples were airborne particle abraded with aluminum dioxide particles (group OxAl), 10 samples were not conditioned as control (group CONT). The surface roughness and surface Vickers hardness analyses were performed before and after the respective surface treatments. Zirconia ceramic cylinders were bonded to the flat zirconia ceramic surfaces and then submitted to shear bond strength tests. Subsequently, the adhesive remnant index (ARI) was measured. Data were submitted to statistical analysis. After the hot-etching, there zirconia showed a lower surface roughness, whereas the tribochemical silica coating and alumina-particle air abrasion didn't change the surface roughness significantly. Topography chances of the Y-TZP surface were noted on all groups. The etched zircon showed smooth surfaces, while tribochemical silica coating and alumina-particle air abrasion created broader plastically deformed areas. The Vickers hardness was similar among the four groups before and after the surface treatment. The SBS were higher on the groups that received a surface treatment. No significant difference was reported between these groups. A correlation was found between ARI scores and the surface treatment. The group ZECS exhibited a higher frequency of ARI= 0 and ARI=1; group ROC had a prevalence of ARI=2 and ARI=3; group OxAl presented a higher frequency of ARI=2, whereas ARI= 1 and ARI=2 was detected in CONT group. Hot acid pretreatment had shear bond strength similar to tribochemical silica coating and alumina-particle air abrasion, so it could be an alternative surface treatment. However, its long term success rate and clinical application should be further evaluated.
The absence of an eyeball results in physical, psychosocial and functional alterations on an individual. Therefore, rehabilitation procedures are essential to repair the patient’s self-esteem, self-confidence and physiological features. The aim of this study is to describe a case of ocular prosthetic rehabilitation in a pediatric patient. A female teenager, 17 years old, was referred to the maxillofacial prosthetic clinic to replace her former prosthesis fabricated two years ago. The new ocular prosthesis was confectioned with termopolymerizable acrylic resin and hand painted with acrylic paint on a colorless acrylic ocular bottom. The prosthesis was installed and the instructions were explained. In teenage patients the prothesis must be elaborated as soon as possible with periodic replacements in accordance with the growth period. The awareness of legal guardians and patients is essential to the success of the treatment in pediatric patients. In the present case, the patient was satisfied with the aesthetic and functional outcome.
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