Monografias, Dissertações e Teses
URI permanente desta comunidadehttps://repositorioacademico.universidadebrasil.edu.br/handle/123456789/1
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Resultados da Pesquisa
Item Avaliação de equipamento portátil na desinfecção rápida de diferentes tipos de máscaras faciais(Universidade Brasil, 2022) Souza, Helen Patrícia de Oliveira Duarte; Baptista, AlessandraThe use of masks to minimize environmental transmission of pathogens has been one of the main strategies to protect health professionals and the general population in times of airway-transmitted diseases. The aim of this in vitro study was to evaluate the efficacy of ultraviolet light (UV-C), with different exposure times, in microbial reduction in diverse types of face masks: tricoline, surgical and N95. The masks were contaminated with 108 UFC/mL suspension of Staphylococcus aureus, with the aid of a spray and submitted to UV-C light exposure, by means of portable equipment (254 nm). Irradiation was performed at 1 cm from the samples, in sweep mode, for 30 s, 45 s and 60 s. To evaluate microbial reduction, pieces of the masks, about 1 cm2 were placed in a test tube containing sterile saline solution and submitted to mechanical agitation, before and after disinfection procedures. To facilitate the final counting, serial dilutions were performed in the order of 1:10, and 10 µL of the suspensions were seeded in Mueller Hinton agar for the final microbial count. All data were analyzed on its distribution using the Shapiro-Wilk test. Parametric data were analyzed using the ANOVA test, followed by the Tukey test. Non-parametric data were analyzed using the Kruskal-Wallis test, followed by the Wilcoxon test. The significance level was considered for p<0.05. The use of UV-C radiation promoted effective microbial reduction in face protection masks, contaminated with S. aureus, in the three models of face protection masks tested in this study (p>0.05) and even 60 s of irradiation was more effective in all types of masks. However, the types of face protection masks evaluated in this study did not influence the effectiveness of disinfection promoted by irradiation with UV-C light, at any irradiation time tested (p<0.05). Therefore, we can conclude that the use of UV-C radiation can promote effective microbial reduction in face protection masks, contaminated with S. aureus, in the three models of masks tested in this study: Tricoline, Surgical and N95, and the microbial reduction is density of dependent energy.Item Uso de infusões de plantas medicinais no controle de Candida albicans em escovas dentais = the use of medicinal plant infusions in the control of Candida albicans in toothbrushes(Universidade Brasil, 2018) Jesus, Tereza Cota de; Frias, Danila Fernanda RodriguesItem Análise dos microrganismos patogênicos e da atividade do ozônio na descontaminação do efluente hospitalar da cidade de Uberlândia-MG = analysis of the pathogenic microorganisms and ozone activity in the decontamination of the hospital effluent of the city of Uberlândia-MG(Universidade Brasil, 2016) Oliveira, Martha Naves de; Kozusny-Andreani, Dora InêsItem Estudo de viabilidade técnica da aplicação do ozônio como desinfetante em resíduos de serviços de saúde.(Universidade Brasil, 2017) Gonzaga, Thais Nogueira; Kozusny-Andreani, Dora InésItem Luz UV-C na descontaminação de diferentes superfícies(Universidade Brasil, 2021) Soares, Roseane Débora Barbosa; Baptista, AlessandraItem Avaliação dos efeitos da desinfecção química e com radiação ultravioleta na estabilidade dimensional de diferentes materiais de moldagem odontológicos(Universidade Brasil, 2021) Santos Neto, Antonio Vinicios dos; Navarro, Ricardo ScarparoThe disinfection of molds obtained with dental impression materials is within the biosafety protocols, in the control of cross-infection of microorganisms in dental offices, prosthesis laboratories, professionals and patients, being currently the target of greater attention due to the pandemic of COVID-19, with the implementation of alternative disinfection protocols and methods. The purpose of this study was to compare the effects of disinfection by ultraviolet radiation and chemical disinfection on dimensional stability of different dental molding materials. Acrylic resin mannequin molds with irreversible hydrocolloidal materials (alginate) (n = 25) and elastomer (condensation silicone) (n = 25) were used with different disinfection methods (n = 5): G1- negative control: no treatment, G2- Glutaraldehyde 2% (10 min), G3- Sodium hypochlorite 1% (10 min), G4- UV-C radiation (λ = 254 nm) (30 s), G5- Autoclave (positive control) (15 min). The molds after the treatments were cast with special plaster. After 24 h, the plaster models were measured by a calibrated, blinded researcher, with a caliper in determined places on the upper first molar: mesio-distal (MD-O) and vestibulo-lingual (VL-O) and buccal cervical-occlusal face (CV-B) and mesio-distal (MD-V). The data were tabulated and analyzed using the statistical tests of Kolmogorov-Smirnov, ANOVA one-way and Tukey tests (p <0.05). There were no statistically significant differences in the linear values of plaster models between chemical (Glutaraldehyde 2%, sodium hypochlorite 1%) and physical (UV-C radiation) disinfection methods with the control (p> 0.05), the autoclave showed a significant difference in relation to the control and the different methods of disinfection (p <0.05) with greater dimensional change for both impression materials. It can be concluded that the methods of chemical disinfection (Glutaraldehyde 2%, Sodium hypochlorite 1%) and physical (UV-C radiation) maintained the dimensional stability of the dental impression materials alginate and elastomer (condensation silicone).