Mechanical and optical properties of conventional restorative glassionomer cements - a systematic review

Objectives: To perform a systematic review of test methodologies on conventional restorative glass-ionomer cement (GIC) materials for mechanical and optical properties to compare the results between different GICs. Material and Methods: Screening of titles and abstracts, data extraction, and quality assessments of full-texts were conducted in search for in vitro studies on conventional GICs that follow the relevant specifications of ISO standards regarding the following mechanical and optical properties: compressive strength, flexural strength, color, opacity and radiopacity. Sources: The Latin American and Caribbean Health Sciences (LILACS), Brazilian Bibliography of Dentistry (BBO) databases from Latin-American and Caribbean System on Health Sciences Information (BIREME) and PubMed/Medline (US National Library of Medicine - National Institutes of Health) databases were searched regardless of language. Altogether, 1146 in vitro studies were selected. Two reviewers independently selected and assessed the articles according to pre-established inclusion/exclusion criteria. Among all the properties investigated, only one study was classified as being of fair quality that tested compressive strength and was included. It was observed that many authors had not strictly followed ISO recommendations and that, for some properties (diametral tensile strength and microhardness), there are no guidelines provided. Conclusions: It was not possible to compare the results for the mechanical and optical properties of conventional restorative GICs due to the lack of standardization of studies

AJUSTE ESTÉTICO EM FACETA DIRETA DE RESINA COMPOSTA

A realização de facetas vestibulares em resina composta tem sido uma alternativa rotineiramente utilizada na clínica odontológica quando há a necessidade de se restaurar dentes anteriores com alteração de cor ou forma anatômica. Para a sua confecção, o profissional deve realizar um correto diagnóstico e plano de tratamento. Também é necessário possuir habilidade manual, a fim de reproduzir detalhes anatômicos, nuances de cor e textura naturais, o que exige boa experiência clínica. O objetivo deste relato é apresentar um caso clínico de confecção de faceta direta em resina composta, salientando a etapa de ajuste estético (textura de superfície) para a reprodução dos detalhes anatômicos superficiais a fim de favorecer a estética e de forma que esta etapa possa ser realizada mesmo por profissionais iniciantes na área de estética

Mechanical and optical properties of conventional restorative glass-ionomer cements - a systematic review

Objectives To perform a systematic review of test methodologies on conventional restorative glass-ionomer cement (GIC) materials for mechanical and optical properties to compare the results between different GICs. Material and Methods Screening of titles and abstracts, data extraction, and quality assessments of full-texts were conducted in search for in vitro studies on conventional GICs that follow the relevant specifications of ISO standards regarding the following mechanical and optical properties: compressive strength, flexural strength, color, opacity and radiopacity. Sources The Latin American and Caribbean Health Sciences (LILACS), Brazilian Bibliography of Dentistry (BBO) databases from Latin-American and Caribbean System on Health Sciences Information (BIREME) and PubMed/Medline (US National Library of Medicine - National Institutes of Health) databases were searched regardless of language. Altogether, 1146 in vitro studies were selected. Two reviewers independently selected and assessed the articles according to pre-established inclusion/exclusion criteria. Among all the properties investigated, only one study was classified as being of fair quality that tested compressive strength and was included. It was observed that many authors had not strictly followed ISO recommendations and that, for some properties (diametral tensile strength and microhardness), there are no guidelines provided. Conclusions It was not possible to compare the results for the mechanical and optical properties of conventional restorative GICs due to the lack of standardization of studies

Advances In Dental Veneers: Materials, Applications, And Techniques.

Laminate veneers are a conservative treatment of unaesthetic anterior teeth. The continued development of dental ceramics offers clinicians many options for creating highly aesthetic and functional porcelain veneers. This evolution of materials, ceramics, and adhesive systems permits improvement of the aesthetic of the smile and the self-esteem of the patient. Clinicians should understand the latest ceramic materials in order to be able to recommend them and their applications and techniques, and to ensure the success of the clinical case. The current literature was reviewed to search for the most important parameters determining the long-term success, correct application, and clinical limitations of porcelain veneers.49-1

Otimização de restaurações estéticas anteriores associando barreira palatina e guia de silicone: relato de caso

É crescente a exigência estética dos pacientes em busca de um sorriso harmonioso, o que leva o cirurgião-dentista à constante necessidade de aperfeiçoamento profissional e de domínio de técnicas de que possa lançar mão para a obtenção de resultados satisfatórios e mais previsíveis. Este artigo objetiva apresentar um caso clínico de restaurações estéticas anteriores, associando o uso da barreira palatina e do guia de silicone transparente. Paciente do gênero masculino, de 22 anos, fumante, buscou atendimento na clínica odontológica da Universidade Estadual de Maringá (UEM) insatisfeito com suas restaurações anteriores. Ao exame clínico, foi observado escurecimento de todos os dentes e visível contraste da linha dente-restauração dos elementos 11 e 21. O paciente foi, primeiramente, submetido ao tratamento clareador caseiro, seguido do enceramento diagnóstico para confeccionar a barreira palatina e o guia de silicone transparente. As restaurações antigas foram removidas e as novas restaurações foram confeccionadas em resina composta com auxílio da barreira palatina, gerando a concha palatina, assim como do guia de silicone transparente, que deu forma às cristas marginais e à face vestibular. Essa técnica se mostrou bastante eficiente, reduzindo o tempo clínico e facilitando o procedimento, uma vez que minimiza a demanda de habilidade manual por parte do operador para obter excelência estética

Effect of Silicon dioxide coating of acrylic resin surfaces on Candida albicans adhesion.

Acrylic resin has been used in the manufacture of prostheses, however, in the oral cavity, this material starts to retain microorganisms capable of causing gingival inflammation due its porosities. The aim of this study was to evaluate the influence of the use of silicon dioxide as a coating layer applied onto acrylic resin, on the adhesion of Candida albicans (Ca). After the incubation period in Sabouraud Dextrose Broth, a total of 1 ml of the Ca suspension was added to plate wells, each well containing a specimen of acrylic resin. The adhesion ability of Ca on acrylic resin was determined by counting colonies. Three groups (n = 6) of acrylic resin were assessed: with polishing (RP); without polishing (RW); with polishing and coating layer of silicon dioxide (RPC). Ca deposited on the surface of the acrylic resin was also observed using Scanning Electron Microscopy (SEM). Statistical assessment by Kruskal-Wallis and Student-Newman-Keuls Method were done (α = 2%). There was significant difference among the groups. The RPC group showed the lowest growth, with an average of 5.59 Log CFU/cm 2 ; there was a statistically significant difference in relation to group RW, which presented a growth of 6.07 Log CFU/cm 2 and to group RP with 5.91 Log CFU/cm 2 (p < 000.1). SEM images demonstrated that in the RP and RPC group, the surface of the resin had greater regularity, and smaller number of microorganisms. The application of silicon dioxide coating on acrylic resin appears to be a promising alternative, and its use can help in reducing the adhesion of Ca in prostheses