Objectives:The objective of the study is to incorporate the nanostructured silver vanadate (AgVO3) decorated with silver nanoparticles at endodontic sealers AH Plus, Sealapex, Sealer 26, and Endofill, at concentrations of 2.5%, 5%, and 10%, and to evaluate physical-chemical properties.Materials and Methods:The study was to evaluate the radiopacity using digital radiography (n = 5), the tooth color change in 48 incisors (n = 3) for 7, 30, 90, and 180 days in a spectrophotometer, and the topographic distribution in a confocal laser (n = 5). The radiopacity was analyzed by Kruskal–Wallis test and the permutation (α = 0.05) and the color and topographical distribution by descriptive statistical analysis.Results:The AgVO3 had no effect on the radiopacity of Endofill and Sealapex (P > 0.05) and at 2.5% concentrations increased the radiopacity of Sealer 26 and AH Plus (P < 0.05). The Endofill 10% showed less color change, and the major changes were the modified groups in 180 days. The AgVO3 showed a circular topographic distribution in areas of the sealers.Conclusion:It was found that the addition of AgVO3 did not affect the radiopacity of Endofill and Sealapex however, increased the radipacity of Sealer 26 and AH Plus. For modified groups, the greatest color change was promoted after 180 days, except for Endofill with 10%. Topographic distribution of nanomaterial affected the color change of theevaluated sealers.

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The aim of this study was to evaluate anxiety, stress and symptoms of temporomandibular disorders (TMD) among a sample of participants that practice choir singing as a recreational activity. As the literature shows the positive effects of choir singing on mental and physical health, we hypothesized that anxiety, stress and TMD symptoms would be less frequent in the choir group when compared to participants from the general population. The choir group included 33 adults who participated weekly in a choral singing group as a recreational activity and the comparison group included 40 participants from the general population. Choir singers had significantly lower levels of anxiety and TMD. A significant positive correlation was observed between anxiety and TMD scores. The groups did not differ regarding the presence of stress symptoms. It seems that choir singing was associated with better mental and physical outcomes. This study reinforces the promising benefits of choir singing as a recreational activity. Although we only included amateur singers in our sample, the literature shows that singing as a professional may be an etiologic factor for developing TMD. Future studies should explore differences between professional and amateur choir singers regarding TMD symptoms.

Biofilm formation on biomaterials is a challenge in the health area. Antimicrobial substances based on nanomaterials have been proposed to solve this problem. The aim was to incorporate nanostructured silver vanadate decorated with silver nanoparticles (β-AgVO3) into dental porcelains (IPS Inline and Ex-3 Noritake), at concentrations of 2.5% and 5%, and evaluate the surface characteristics (by SEM/EDS), antimicrobial activity (against Streptococcus mutans, Streptococcus sobrinus, Aggregatibacter actinomycetemcomitans, and Pseudomonas aeruginosa), silver (Ag+) and vanadium (V4+/V5+) ions release, and mechanical properties (microhardness, roughness, and fracture toughness). The β-AgVO3 incorporation did not alter the porcelain’s components, reduced the S. mutans, S. sobrinus and A. actinomycetemcomitans viability, increased the fracture toughness of IPS Inline, the roughness for all groups, and did not affect the microhardness of the 5% group. Among all groups, IPS Inline 5% released more Ag+, and Ex-3 Noritake 2.5% released more V4+/V5+. It was concluded that the incorporation of β-AgVO3 into dental porcelains promoted antimicrobial activity against S. mutans, S. sobrinus, and A. actinomycetemcomitans (preventing biofilm formation), caused a higher release of vanadium than silver ions, and an adequate mechanical behavior was observed. However, the incorporation of β-AgVO3 did not reduce P. aeruginosa viability and increased the surface roughness of dental porcelains.

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RESUMO | Objetivo:Considerando os inúmeros benefícios a saúde física e mental proporcionados pelas atividades artísticas, o objetivo deste estudo é avaliar a relação entre a prática recreativa de instrumentos musicais e as disfunções temporomandibulares (DTM) e os distúrbios do sono (DS) em uma amostra de músicos integrantes de orquestras do interior de São Paulo que praticam instrumentos musicais como forma de lazer. Método: Trata-se de um estudo transversal constituído por dois grupos. O grupo controle, com indivíduos da comunidade em geral, apresentou idade média de 28,35 anos (±4,867), enquanto o grupo de músicos instrumentistas, 28,37 anos (±6,712). Ambos os grupos foram constituídos por 43 voluntários, sendo 14 mulheres e 29 homens. Os participantes responderam ao questionário anamnésico de Fonseca e ao questionário de Fletcher e Luckett para avaliar sintomas de DTM e distúrbios do sono, respectivamente. Resultados: Foi encontrada uma forte associação entre a presença de DTM e o tempo de prática musical, de modo que os participantes com pouca prática possuem 8,57 (p=0,002) vezes mais chances de apresentarem DTM do que os participantes com muita prática. Os grupos não diferiram quanto aos sintomas de DTM e DS e quanto a variáveis demográficas. Conclusão: A prática recreativa de instrumentos musicais em longo prazo pode diminuir as chances de desenvolvimento de disfunção temporomandibular. Este estudo reforça que tocar um instrumento musical por lazer traz benefícios para a saúde física, especificamente como fator de proteção ao desenvolvimento de disfunção temporomandibular. ABSTRACT | Effect of music instruments practice in temporomandibular joint dysfunction and sleep disorders • Objective: The aim of this study was to evaluate the relation among recreational practice of musical instruments, temporomandibular disorders (TMDs), and sleep disturbances in a sample of musicians that are members of orchestras in a southeast area of Brazil. The participants practice playing instruments as a leisure activity. Method: this was a cross-sectional study with two groups. The comparison group included members from the general population. Both group included 43 adults, being 14 women and 29 men. The mean age of comparison group is 28.35 (±4.867), and the mean age of musician group is 28.37 (±6.712). The participants completed self-rated questionnaires to assess TMDs symptoms and sleep disturbance. Results: the groups did not differ regarding the presence of TMDs symptoms, sleep disturbance, and demographic variables. A strong and negative correlation was observed between TMDs and time of playing a musical instrument. The participants with less practice in years in playing a musical instrument have 8.57 more chance of having TMDs than the musicians with a long history of playing an instrument. Conclusion: it seems that a long history of practicing a musical instrument as a leisure activity is associated with a lower chance of developing TMDs. This study reinforces the benefits of playing a musical instrument as a leisur...

1 Perfil de sinais e sintomas osteomoleculares relacionados ao trabalho em odontologia: avaliação dos professores da clínica odontológica da Universidade Vale do Rio Verde (UninCor) RESUMO | A prática da odontologia submete o profissional a fatores de risco que, quando não aplicadas formas de prevenção, levam ao desenvolvimento de lesões de distúrbios osteomusculares relacionados ao trabalho (DORT). Objetivo: o objetivo deste trabalho foi avaliar a incidência de DORT em professores da clínica odontológica da Faculdade de Odontologia da Universidade Vale do Rio Verde (UninCor) do campus de Três Corações (MG). Materiais e métodos: 35 docentes odontólogos da clínica de odontologia da UninCor responderam a um questionário sobre DORT relacionados à profissão docente de cirurgiões-dentistas. Resultados: a média de trabalho entre os participantes seria de 9,87 horas por dia e 48,4 horas por semana. Dos indivíduos participantes, apenas dois não tinham conhecimento de DORT, A maioria dos participantes apresentaram um ou mais sintomas relacionados a DORT, sendo que dois apresentavam no início do dia e 18 ao final. Apenas quatro dos profissionais realizam exercícios para prevenção, apesar de 17 terem conhecimento da existência deles. O sintoma mais frequente na amostra foi tensão ou dor muscular. Conclusões: conclui-se que a elevada presença de sintomas de DORT em cirurgiões-dentistas está relacionada ao estilo de vida e à ausência de formas de prevenção na rotina desses profissionais. DESCRITORES | Doenças Musculoesqueléticas; Odontologia; Professores.ABSTRACT | Signs and symptoms of work-related musculoskeletal disorders in dentistry: evaluation of professors of the dental clinic of Universidade Vale do Rio Verde (UninCor) • The practice of dentistry subjects professionals to risk factors that may lead to the development of work-related musculoskeletal disorders (WRMDs) if the appropriate prevention measures are not applied. Objective: to evaluate the incidence of WRMDs in professors of the dental clinic of the School of Dentistry of Universidade Vale do Rio Verde -Unincor of the Três Corações campus. Materials and method: 35 professors from the Dentistry Clinic of UninCor answered a questionnaire about WRMDs related to the teaching profession of dentists. Results: the mean workload found among participants was 9.87 hours per day and 48.4 hours per week. Only 2 participants were not aware of WRMDs. Most participants had one or more symptoms related to WRMDs, with 18 presenting them at the end of the day and 2 at the beginning of the day. Only four professionals perform exercises for prevention, although 17 are aware of the existence of such exercises. The most frequent symptom found in the sample was muscle tension or pain. Conclusion: the high presence of WRMDs symptoms in dental surgeons is related to lifestyle and lack of prevention in the daily life of these professionals. DESCRIPTORS |

Objective: To develop a material for denture relining and assess the microbiological and mechanical properties. The proposed liner was obtained through the incorporation of nanostructured silver vanadate (AgVO3) at 0, 1, 2.5, 5, and 10% polyethyl methacrylate (PEMA) containing plasticizer. Methods: Antimicrobial efficacy was evaluated by the Kirby Bauer agar method against Enterococcus faecalis, Pseudomonas aeruginosa, Candida albicans and Staphyloccocus aureus (n = 5); and mechanical properties were also assessed through roughness, such as Shore A hardness and tensile test. The results were analyzed by ANOVA and Tukey’s Multiple Comparison test (α = 0.05). Results: The material with AgVO3 at concentrations of 1% and 2.5% showed antimicrobial activity for E. faecalis, and 5% and 10% groups were effective for E. faecalis, P. aeruginosa and C. albicans. In the 5% group, hardness remained unchanged (p < 0.001). None of the tested concentrations significantly changed the roughness and the tensile strength (P > 0.05). Conclusion: Obtaining the material with antimicrobial potential promoted efficacy against E. faecalis, P. aeruginosa and C. albicans, kept the roughness property unchanged, did not change the adhesion property of the material to polymethyl methacrylate, and it maintained the hardness values compatible with resilient denture liners.