Knowledge about Coronavirus disease 19 (COVID-19) and its professional repercussions among Brazilian endodontists

Abstract The aim of this study was to assess Brazilian endodontists' level of knowledge about the coronavirus disease (COVID-19) and examine its professional repercussions. The link to the online survey that was created for this study was shared with Brazilian endodontists through social networking applications. The questionnaire contained questions that pertained to COVID-19 and its impact on dental practice. The collected data were analyzed using t-test, chi-square analysis, and analysis of variance, and the level of significance was set at 0.05. A total of 2,135 participants responded to the questionnaire, and all five Brazilian regions were represented in the sample. A total of 98.50% of endodontists reported that dental procedures can transmit COVID-19. Complete social distancing was practiced by 96.68% of the participants, and approximately 25% knew someone who had COVID-19. Moreover, in their daily practice, 72.13% of them implemented biosecurity measures that are ineffective in preventing COVID-19. Furthermore, 91.7% of them reportedly suspended elective dental procedures. Only 55.69% of them reported that they performed only emergency procedures in their workplaces. Those who believed that COVID-19 cannot be transmitted during dental procedures were less knowledgeable about the symptoms of COVID-19 (p = 0.0095). Endodontists who believed that personal protective equipment cannot prevent contamination were more knowledgeable about the symptoms of COVID-19 than their counterparts (p = 0.0003). The participating Brazilian endodontists demonstrated adequate knowledge about the risk of contamination during dental procedures and the main symptoms of COVID-19. Only some professionals reported providing emergency dental care during the pandemic.

Terapia fotodinâmica antimicrobiana para candida albicans estudo microbiológico, biomolecula e de seus efeitos na resina acrílica

O amplo espectro das candidíases orais e a respectiva importância clínica da infecção impulsionam pesquisas que pretendem identificar tratamentos eficazes seletivos contra Candida albicans. Este estudo foi dividido em quatro capítulos, cujos objetivos foram:Capítulo 1) Analisar o efeito antimicrobiano de diferentes protocolos de Terapia Fotodinâmica antimicrobiana (TFDa) em suspensões e bio filme de Candida albicans, por meio da determinação da Concentração Inibitória Mínima (CIM), Concentração Fungicida Mínima (CFM), sobre as seguintes formas de associação: LED 630 nm/ 1000 mW/ 152 J cm2, associado às soluções de azul de metileno (AM) e azul de orto toluidina (AOT) e LED 520nm/ 400 m W/cm2/ 152 J cm-2 junto à solução de rosa bengala (RB); Capítulo 2) Avaliar possíveis danos à estrutura de superfície da resina acrílica, como alteração de cor, rugos idade e perda de massa, com o uso de fotos sensibilizadores (FSs) aplicados nas terapias propostas no capítulo 1, e compará-los com desinfetantes de uso comum na prática clínica; Capítulo 3)Verificar o potencial genotóxico da TFDa e a produção de Espécies Reativas de Oxigênio (EROs), com teste citométrico associado ao composto fluorescente H2DCF-DA, e testes de extensão dos danos no DNA em células de C. albicans; Capítulo 4) Desenvolvimento de 11projeto de patente de um dispositivo confeccionado para TFDa em materiais protéticos. Para os trabalhos realizados com uso de TFDa, os grupos experimentais foram divididos da seguinte maneira...

The broad spectrum of oral candidiasis and their importance in clinical infection stimulatedresearches intended to clarify the pathogenic mechanisms and identify selective treatmentsagainst Candida albicans. This study was divided into four chapters, with the followingobjectives: Chapter 1) To analyze the effect of different antimicrobial photodynamic therapy(PACT) protocols in suspensions and biofilms of Candida albicans, through determination ofMinimum Inhibitory Concentration (MIC), Minimum Fungicide Concentration (MFC), actionfront planktonic culture and biofilm of Candida albicans, on the associations: LED 630nm/1000 mW/152 J cm-2, associated with methylene blue (MB) and toluidine blue ortho(TBO) and LED 520 nm/400 mW/152 J cm-2 with Bengal Rose (BR); Chapter 2) To evaluatepossible damage to the surface structure of acrylic resins, such as color change, surfaceroughness and mass loss, through the use of photosensitizers (Ps) applyed in therapiesproposed in Chapter 1, and compare them with commonly used disinfectants in clinicalpractice; Chapter 3) Check the genotoxic potential of PACT and the production of ReactiveOxygen Species (ROS), with cytometric test associated with the fluorescent compoundH2DCF-DA, and testing of DNA damage on C. albicans cells; Chapter 4) The developmentof a patent project for an antimicrobial phototherapy device for disinfection of prosthetic materials...