Evaluation of physical and biological properties of conventional glass ionomer cements / Avaliação das propriedades físicas e biológicas de cimentos de ionômero de vidro convencionais

Objetivo: avaliar as propriedades físicas e biológicas dos cimentos de ionômero de vidro convencionais (CIVs). Metodologia: foram avaliados os seguintes CIVs: Fuji IX (GC Europe, Bélgica), Ketac Molar (3M ESPE, Estados Unidos), Maxxion R (FGM, Brasil) e Vitro Molar (Nova DFL, Brasil). O tempo de presa, a alteração dimensional, a radiopacidade, a sorção e a solubilidade em água foram avaliados para todos os materiais. A resistência à compressão foi analisada em intervalos de 1h, 24h, 7 dias e 28 dias; e liberação de íons fluoreto em 3h, 24h e 72h. A viabilidade celular foi avaliada após 24 e 48 horas com células de fibroblastos. A análise estatística foi realizada por meio do software SigmaPlot 12 (Systat Inc, San Jose, CA, EUA), com nível de significância estabelecido em α = 0,05. Resultado: apenas o Fuji IX teve um tempo de presa dentro da faixa recomendada pela Especificação Padrão da ADA 96 (2012), não superior a 6 minutos. Vitro Molar e Maxxion R apresentaram radiopacidade que não estava de acordo com a especificação ADA 96 (2012). Maxxion R e Vitro Molar mostraram uma alteração dimensional estatisticamente semelhante. Quanto às propriedades mecânicas, o Fuji IX foi o único CIV que apresentou aumento da resistência à compressão durante o período de avaliação de 28 dias. O Ketac Molar apresentou a maior viabilidade celular, enquanto o Maxxion R apresentou citotoxicidade severa e o maior valor cumulativo de liberação de flúor. Conclusão: Fuji IX e Ketac Molar apresentaram as propriedades físicas e biológicas mais adequadas entre os CIVs avaliados.(AU)

Objective: to evaluate the physical and biological properties of conventional glass ionomer cements (GICs). Methodology: the following GICs were evaluated: Fuji IX (GC Europe, Belgium), Ketac Molar (3M ESPE, United States), Maxxion R (FGM, Brazil) and Vitro Molar (Nova DFL, Brazil). Setting time, dimensional change, radiopacity, water solubility and water absorption were evaluated for all materials. Compressive strength was analyzed after intervals of 1h, 24h, 7 days and 28 days; and release of fluoride ions at 3 am, 24 am and 72 am. Cell viability was assessed after 24 and 48 hours with fibroblast cells. Statistical analysis was performed using SigmaPlot 12 software (Systat Inc, San Jose, CA, USA), with a significance level set at α = 0.05. Result: only the Fuji IX had an adjustment time within the range recommended by the Standard Specification of ADA 96 (2012) of not exceeding 6 minutes. Vitro Molar and Maxxion R had radiopacity that was not in accordance with the ADA 96 (2012) specification. Maxxion R and Vitro Molar showed a statistically similar dimensional change. As for mechanical properties, Fuji IX was the only GIC that showed an increase in compressive strength during the evaluation period of 28 days. Ketac Molar showed the highest cell viability, while Maxxion R showed severe cytotoxicity and the highest cumulative fluoride release value. Conclusion: Fuji IX and Ketac Molar showed the most appropriate physical and biological properties among the evaluated GICs.(AU)

Efficacy of rhBMP-2 in Cleft Lip and Palate Defects: Systematic Review and Meta-analysis.

The aim of this study was to analyze the efficacy of using rhBMP-2 (recombinant human morphogenetic protein-2) in the treatment of patients with cleft lip and palate defects (CLPD). Seven databases were screened: PubMed (Medline), Lilacs, Ibecs, Web of Science, BBO, Scopus, and The Cochrane Library. Clinical trials that evaluated the use of bioactive treatment with rhBMP-2 in the treatment of patients with CLPD were included. Statistical analyses were performed by comparing the standardized mean difference of bone formation volume and bone filling percentage (p = 0.05). Ten studies compared the use of rhBMP-2 and iliac crest bone graft (ICBG). The global analysis for bone formation volume and bone filling percentage showed that bioactive materials were similar to ICBG with a standardized mean difference of respectively 0.07 (95% CI - 0.41 to 0.56) and 0.24 (95% CI - 0.32 to 0.80). The available literature suggested that use of rhBMP-2 presented similar bone formation results to those of ICBG in secondary alveolar bone grafting for patients with CLPD.

Physical and Biological Properties of a High-Plasticity Tricalcium Silicate Cement.

INTRODUCTION: Mineral Trioxide Aggregate (MTA) is a tricalcium-based silicate, dicalcium silicate matrix. Despite its good biologic properties, some clinicians still claim to have difficulties in handling MTA after its preparation due to its sandy consistency. The aim of the present study was to evaluate the physicochemical properties and cytotoxicity of MTA Repair HP (Angelus, Londrina, PR, Brazil) compared with MTA Angelus (Angelus, Londrina, PR, Brazil). MATERIALS AND METHOD: The properties assessed were particle size, setting time, flow, film thickness, radiopacity, water solubility, compressive strength, and cytotoxicity. Statistical analysis was performed considering p < 0.05 as statistically significant. RESULTS: For radiopacity, water absorption and solubility MTA Repair HP were statistically similar to MTA Angelus. The MTA Angelus had statistically different film thickness values, higher than MTA Repair HP (p < 0.05). Besides, MTA Angelus showed a lower and statistically different compressive strength after 28 days than MTA Repair HP (p<0.05). Additionally, MTA Repair HP set more slowly (p < 0.05). Relative to cell viability, MTA Repair HP was statistically similar to MTA Angelus after 24 and 48 h in cell viability. CONCLUSIONS: The MTA Repair HP presented similar cell viability, lower film thickness, higher flow, setting time, and compressive strength values after 28 days than MTA Angelus. In general, the MTA Repair HP presented physicochemical and biological properties similar to the MTA Angelus.

Current trends and future perspectives of dental pulp capping materials: A systematic review.

To systematically review the literature to analyze the current trends and future perspectives of dental pulp capping materials through an analysis of scientific and technological data. This study is reported in accordance with the PRISMA Statement. Nine databases were screened: PubMed (MedLine), Lilacs, IBECS, BBO, Web of Science, Scopus, SciELO, Google Scholar, and The Cochrane Library. Additionally, the following patent applications were searched online in Questel Orbit (Paris, France), USPTO, EPO, JPO, INPI, and Patentscope databases. A total of 716 papers and 83 patents were included. Calcium hydroxide was the main type of material studied, especially for direct pulp capping, followed by MTA. Patents related to adhesives or resins increased from 1998 e 2008, while in the last years, a major increase was observed in bioactive materials (containing bioactive proteins), materials derived from MTA (calcium silicate, calcium phosphate and calcium aluminate-based cements) and MTA. It was possible to obtain a scientific and technological overview of pulp capping materials. MTA has shown favorable results in vital pulp therapy that seem to surpass the disadvantages of calcium hydroxide. Recent advances in bioactive materials and those derived from MTA have shown promising results that could improve biomaterials used in vital pulp treatments. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1358-1368, 2018.