Odontologia
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Navegando Odontologia por Autor "Almeida, Josiane de"
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Artigo Científico Acesso embargado Avaliação da penetração bacteriana em membranas utilizadas na regeneração tecidual guiada: uma revisão integrativa(2020) Gil, Ana Clara KuertenThe aim of this study was to identify, through a integrative review of articles, if the membranes used in guided tissue regeneration (GTR) are permeable to bacteria. The literature research was made using the following data base: PubMed, Scientific Electronic Library Online (SciELO), and Latin American and Caribbean Health Sciences Literature (Lilacs). The following descriptors and their combinations were used: [guided tissue regeneration*] OR [guided bone regeneration*] OR [absorbable membrane*] OR [nonabsorbable membrane*] AND [bacteria*] OR [microrganisms*]. After the inclusion and exclusion criteria were applied, a total of 8 articles were analyzed according to the proposed objective. Different types of membranes were studied, such as e-PTFE, d-PTFE, collagen, glycolide fiber, polyglycolic acid and polylactic acid. The penetration of various bacteria species, highlighting P. gingivalis, S. mutans, A. actinomycetemcomitans, F. nucleatum, S. oralis, was evaluated through SEM analysis, histological analysis or CFUs counting, in times that varied from 2 h to 4 weeks. Membranes incorporated with antibiotics demonstrated a delay on bacterial penetration. However, the majority of the membranes showed permeability to the bacteria. The present integrative review identified 8 articles, which most of the resorbable and non-resorbable membranes used in GTR procedures allow bacteria penetration.Artigo Científico Acesso aberto Efetividade do óleo essencial lemon tea tree na eliminação do biofilme de enterococcus faecalis em dentina bovina(2017) Silva, Gabriela PontesAim: The aim of this study was to evaluate and compare, ex vivo, the effectiveness of calcium hydroxide [Ca(OH)2] and Lemon Tea Tree essential oil (LTT) against E. faecalis biofilm on root canal of bovine teeth. Methods: After E. faecalis biofilm formation in 42 dentin tubes of bovine teeth, the specimens were randomly divided according to the intracanal dressing (n=10): G1- Ca(OH)2; G2- LTT 5%; e G3- control - saline 0.85%. After 7 days, intracanal medication was removed and the collection of microbiological samples from the remaining biofilm was performed. The dentin tubes without medication were immediately immersed in sterile culture medium and stored for 7 days to allow the analysis of residual antimicrobial effect of each medication. After that, another microbiological sampling was performed. The bacterial viability test, by colony forming units (CFUs) counting, was carried out from the material collected in both moments. The architecture of biofilms of 4 specimens of each group were analyzed by scanning electron microscopy. The mean values of CFUs were analyzed by one way ANOVA and post hoc Tukey tests (P < 0.05). Results: Results obtained after removal of medications showed a 100% microbial reduction promoted by Ca(OH)2 (P < 0,001) and 96,31% promoted by LTT 5% (p < 0,004), compared to the control. Only Ca(OH)2 showed significant residual antimicrobial effect (P = 0,001), although LTT 5% had eliminated 69,89% of E. faecalis cells. Conclusion: The LTT 5%, as intracanal dressing, showed excellent antimicrobial effectiveness, comparable to the Ca(OH)2, against E. faecalis biofilm on root canal of bovine teeth.