in vitro antimicrobial activity of different gutta-percha points and calcium hydroxide pastes atividade antimicrobiana in vitro de diferentes composições de cones de guta-percha e pastas de hidróxido de cálci

Clicks: 241
ID: 159968
2007
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Abstract
The aim of this study was to evaluate the antimicrobial activity of different trademarks and compositions of gutta-percha points and calcium hydroxide pastes used in endodontic therapy. The evaluated material consisted of gutta-percha points containing calcium hydroxide (RoekoTM), gutta-percha points containing chlorhexidine (RoekoTM), two convencional gutta-percha points (Endo PointsTM and RoekoTM) and two calcium hydroxide pastes (CalenTM and Calen/PMCC TM). Antimicrobial tests included five species of microorganisms: Escherichia coli (ATCC10538), Staphylococcus epidermidis (ATCC12228), Staphylococcus aureus (ATCC6538), Pseudomonas aeruginosa (ATCC27853), and Micrococcus luteus (ATCC9341). The Agar difusion method was employed. The plates were kept at room temperature for 2 h for prediffusion and then incubated at 37°C for 24 h. The triphenyltetrazolium chloride gel was added for optimization and the zones of inhibition were measured. Statistical evaluation was carried out using analysis of variance and Tukey Test. The obtained results showed that all microbial species used in the study were inhibited by the gutta-percha points containing chlorhexidine and by the calcium hydroxide pastes (CalenTM and Calen/PMCC TM), with similar results (p > 0.05). No antimicrobial activity was observed for the other groups. It was concluded that the gutta-percha points containing chlorhexidine presented antimicrobial activity, whereas the gutta-percha points containing calcium hydroxide did not.
O objetivo deste estudo foi a avaliação da atividade antimicrobiana de diferentes marcas e composições de cones de guta-percha e pastas à base de hidróxido de cálcio utilizados em endodontia. Os materiais avaliados foram: cones de guta-percha contendo hidróxido de cálcio (RoekoTM), cones de guta-percha contendo clorexidina (RoekoTM), duas marcas de cones de guta-percha (Endo PointsTM e RoekoTM) e duas pastas à base de hidróxido de cálcio (CalenTM e Calen/PMCC TM). Os testes antimicrobianos incluíram 5 espécies de microrganismos: Escherichia coli (ATCC10538), Staphylococcus epidermidis (ATCC12228), Staphylococcus aureus (ATCC6538), Pseudomonas aeruginosa (ATCC27853) e Micrococcus luteus (ATCC9341). O método empregado foi o de difusão em Ágar. As placas foram mantidas em temperatura ambiente por 2 horas para pré-difusão e então incubadas a 37°C por 24 horas. O gel de cloreto de trifeniltetrazólio foi acrescentado para otimização e as zonas de inibição foram medidas. A análise estatística foi realizada pela análise de variância e pelo teste de Tukey. Os resultados obtidos demonstraram que todas as espécies microbianas usadas foram inibidas pelos cones de guta-percha com clorexidina e pelas pastas à base de hidróxido de cálcio (CalenTM e Calen/PMCC TM), com resultados similares entre os materiais (p > 0.05). Nenhuma atividade antimicrobiana foi observada para os demais grupos. Concluiu-se que os cones de guta-percha com clorexidina apresentaram atividade antimicrobiana, enquanto os cones com hidróxido de cálcio não demonstraram esta propriedade.
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Authors ;Juliane Maria Guerreiro Tanomaru;Fernanda Geraldes Pappen;Mário Tanomaru Filho;Denise Madalena Palomari Spolidorio;Izabel Yoko Ito
Journal journal of information and computational science
Year 2007
DOI
10.1590/S1806-83242007000100006
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242007000100006
Keywords
Microbiology calcium hydroxide

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