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http://hdl.handle.net/1843/SBPS-7B5NRA
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DC Field | Value | Language |
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dc.contributor.advisor1 | Marcos Pinoti Barbosa | pt_BR |
dc.contributor.referee1 | Alfredo Mauricio Batista De Paula | pt_BR |
dc.contributor.referee2 | Armando Albertazzi Gonçalves Junior | pt_BR |
dc.contributor.referee3 | Luiz Thadeu de Abreu Poletto | pt_BR |
dc.contributor.referee4 | Mauricio Veloso Brant Pinheiro | pt_BR |
dc.contributor.referee5 | Roberto Marcio de Andrade | pt_BR |
dc.creator | Gerdal Roberto de Sousa | pt_BR |
dc.date.accessioned | 2019-08-09T14:22:41Z | - |
dc.date.available | 2019-08-09T14:22:41Z | - |
dc.date.issued | 2007-03-03 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/1843/SBPS-7B5NRA | - |
dc.description.abstract | The aim of the present study is to evaluate in vitro lethal sensibilization of periodontopathogenic bacteria: Fusobacterium nucleatum (Fn), Actinobacillus actinomycetemcomitans (Aa) and Prevotella intermedia (Pi) by using toluidine blue (0.01% w/v) as photo sensitizer and comparing the irradiation of identical solutions of bacteria with photo sensitizer by three light sources: two lasers systems of different companies (660 nm) and one LED equipment (light emitting diode, 630 nm). For each species, they were established a control group anddifferent test groups, among them: Group 6 (Fn, Aa and Pi) bacteria solution irradiated by laser 1; Group 7 (Fn, Aa and Pi) bacteria solution irradiated by laser 2 and Group 8 (Fn, Aa and Pi) bacteria solution irradiated by LED. Irradiation protocol followed the literature recommendations: 5 minutes of preirradiation time and 3 minutes of irradiation. Results reveal that the bacteria reduction for the irradiated groups (6, 7 and 8) in comparison with control group is statistically significant (p<0.05). Actinobacillus actinomycetemcomitanspresented important level of reduction (99.8% for Group 6Aa, 81.9% for Group 7Aa and 99.8% for Group 8Aa) as well as Fusobacterium nucleatum (93.7% for Group 6Fn, 84% for Group 7Fn and 99.8% for Group 8Fn). Prevotella intermedia presented low level of reduction (26.3% for Group 6Pi, 38.6% for Group 7Pi and 49.5% for Group 8Pi). Toluidine blue at concentration of 0.01% w/v is an effective photosensitizer for Actinobacillus actinomycetemcomitans and Fusobacterium nucleatum when irradiated with the light wavelength in the range of 630 to 660 nm using laser or LED light sources. | pt_BR |
dc.description.resumo | O objetivo deste estudo foi avaliar e comparar a sensibilizacao letal in vitro das bacterias periodontopatogenicas (Fusobacterium nucleatum, Actinobacillus Actinomycetemcomitans e Prevotella intermedia), atraves da utilizacao de lasers e LED (Light Emitting Diode) no processo de reducao bacteriana, utilizando como fotossensibilizador azul de toluidina (TBO) a 0,01%. Os resultados estatisticos obtidos pelo Teste t-student demonstraram que os grupos de terapia fotodinamica (PDT) (grupos 6, 7, 8) sao diferentes do grupo controle para p=0,05 e os valores percentuais de reducao bacteriana dos grupos PDT foram de 99,8% no grupo 6, 81,9% no grupo 7 e 99,8% no grupo 8 para o Actinobacillus actinomycetemcomitans, de 93,7% no grupo 6, 84% para o grupo 7 e 99,8% no grupo 8 para o Fusobacterium nucleatum e 26,3% no grupo 6, 38,6% no grupo 7 e 49,5% no grupo 8 para a Prevotella intermedia,demonstrando assim, que o corante azul de toluidina 0,01% associado aos lasers e ao LED apresenta um excelente potencial para a utilizacao em PDT, na sensibilizacao letal dessas bacterias nos parametros utilizados no experimento (¢t=3minutos). | pt_BR |
dc.language | Português | pt_BR |
dc.publisher | Universidade Federal de Minas Gerais | pt_BR |
dc.publisher.initials | UFMG | pt_BR |
dc.rights | Acesso Aberto | pt_BR |
dc.subject | Sensibilização letal | pt_BR |
dc.subject | Bactérias periodontopatogênicas | pt_BR |
dc.subject | Terapia fotodinâmica | pt_BR |
dc.subject.other | Bioengenharia | pt_BR |
dc.subject.other | Engenharia mecânica | pt_BR |
dc.title | Análise comparativa da emissão de luz por led e lasers emitindo no vermelho do espectro eletromagnético na redução de bactérias periodontopatogênicas: estudo "In Vitro" | pt_BR |
dc.type | Tese de Doutorado | pt_BR |
Appears in Collections: | Teses de Doutorado |
Files in This Item:
File | Description | Size | Format | |
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tese_gerdal_final.pdf | 1.6 MB | Adobe PDF | View/Open |
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