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Objective: To guide professionals about the criteria for replacing amalgam restorations and inform them about the new guidelines regarding the use/indication of this (amalgam) material after the Minamata Convention – COP-4. Material and Methods: The articles were selected from the databases (PubMed, Scielo, Bireme), and relevant articles on the subject between the years 2003-2021 were selected. Recently, social media have been flooded with dental treatments that aim to perform restorations only with composite resins or other types of esthetic material and completely replace all dental amalgam restorations, irrespective of their time in place, size, and functionality. Results: Although improperly, it has been noted that this information reaches patients, and they are led to believe in the inaccurate data that is passed on, such as, for example, (that amalgam leads to) permanent contamination by mercury, causing systemic problems and the loss of the tooth. Conclusion: The "phase down" of amalgam in research and teaching has previously been observed in several countries worldwide; however, its use is still necessary given particular circumstances, which, theoretically, make it a material with exact indication.

O mundo está novamente testemunhando uma doença causada por um grupo de vírus que pode contaminar animais e humanos. Contato próximo, como em atendimentos odontológicos, são grandes mecanismos de transmissão da doença. Dessa forma, tendo impacto em todas as áreas da saúde, destacamos neste texto, o olhar e os cuidados frente às clínicas odontológicas e radiológicas. O objetivo dessa breve comunicação, é orientar os cirurgiões dentistas e os profissionais da área de radiologia sobre as formas de proteção e biossegurança no atendimento dos pacientes. Foram elaboradas algumas recomendações para evitar a disseminação da varíola dos macacos nas clínicas radiológicas. É importante que as clínicas continuem com o cuidado e processo de desinfeção iniciado desde a pandemia por COVID-19. Provavelmente, as recomendações contidas neste documento poderão ser utilizadas não apenas nos períodos de descoberta de novas doenças ou pandêmico, mas também em períodos considerados não preocupantes.

O ensino da odontologia começa com disciplinas isoladas de cada área. Nos semestres finais, ocorre a Clínica Integrada, onde o aprendizado fragmentado é unificado. Sendo assim, o objetivo desse trabalho, de abordagem qualitativa, engloba a descrição, planejamento, execução e desenvolvimento de conceitos relativos a disciplinas do curso de Odontologia, utilizando o Team Based Learning (TBL) como Metodologia Ativa de Ensino-Aprendizagem (MAEA). Alunos que cursavam o oitavo período, no primeiro contato com a disciplina de Clínica Integrada, antes do atendimento a pacientes, foram submetidos ao TBL com questões de cunho clínico e interdisciplinar, selecionadas de provas anteriores do Exame Nacional de Desempenho dos Estudantes (ENADE). A interpretação dos resultados permitiu inferir que o TBL foi útil ao processo de aprendizagem e na avaliação da formação dos acadêmicos, uma vez que o entendimento dos professores do grau de conhecimento dos alunos facilitou a seleção dos pacientes a serem atendidos, garantindo excelência técnica.

ABSTRACT Introduction: Composite resins are an extensively used esthetic material that has excellent adaptation, reproduces the characteristics of the tooth structure and is suitable for the conditions of the oral environment. However, this material is also very susceptible to staining due to pigmentation coming from the diet and habits of the patient. Objectives: To evaluate the staining of two brands of composite resin, one nanoparticle and a nanohybrid type (Filtek Z350XT® and IPS Empress Direct®), in direct contact with the acid pH of beverages. Methods: In total 40 specimens were made, 20 of each type of resin studied. After being inserted into a Teflon matrix and light activated, the samples were removed, stored in containers with 2 ml of artificial saliva and kept in the refrigerator. Every day 20 of these samples were placed in direct contact with 2 ml Gatorade, and the other 20 samples, in 2 ml of wine, each set for 30 minutes. After 30 minutes, the acid pH substances were removed, and 2 ml of artificial saliva was again placed in the container. This process was repeated every day for 10 days. Results: The results showed that the nanoparticle resin (Filtek Z350XT) was more susceptible to staining than the nanohybrid type (Empress Direct®) when in contact with the wine. When wine and Gatorade were compared, the solution with higher staining capacity was shown to be wine. Conclusion: The two resins tested were susceptible to staining in a 10-day period. Mottling and more staining was visibly detected after samples were immersed in the solution with the higher pH, and nanoparticulate resin was more susceptible to staining.

The aim of this in vitro study was to evaluate the effect of different mouthwashes on superficial roughness and Knoop hardness of two resin composites. Eighty specimens (6 mm Ø and 2 mm height) were prepared and divided into eight experimental groups (n = 10) according to the resin composites (4 Seasons and Esthet X), and storage solutions (G1 - Distilled water; G2 - Colgate Plax Overnight; G3 - Colgate Plax Alcohol Free; and G4 - Colgate Plax Whitening). The initial hardness and roughness readings (T1) were measured and then the specimens were stored in 2 mL of mouthwash for 12 h (T2) and 24 h (T3). The data were analyzed with repeat-measures two-way ANOVA and Tukey's test (α = 5%). Regardless of the type of solution and time of exposure, there was no statistical difference for roughness between the resins (p = 0.44). G4 and G8 presented higher roughness means than G1, G3, G5 and G7, after 12 and 24 hours of immersion. For Knoop microhardness analysis, there was a significant reduction for all groups after 12 hours and 24 hours. We conclude that the mouthwashes containing hydrogen peroxide and/or alcohol decrease the microhardness of the resins tested; however, the mouthwash containing hydrogen peroxide had a higher deleterious effect on roughness.