Capacidade seladora de remanescente de obturação do canal radicular frente a indicadores microbianos / Sealing ability of root canal filling remnants by microbial indicators

RESUMO

Estudou-se a capacidade seladora de remanescentes de obturação do canal radicular (4, 5 e 6mm), frente ao emprego do Sealapex e do EndoFill, valendo-se de diferentes indicadores microbianos. Para o teste de infiltração empregou-se uma plataforma, dividida em duas partes câmara superior - onde foi introduzida a suspensão microbiana (contendo E. faecalis S. aureus, P. aeruginosa, B. subtilis e C. albicans) e uma câmara inferior, com o meio de cultura Brain Heart Infusion, onde 3 mm da região apical permaneceram imersos. O período de observação foi de 60 dias. Os dados obtidos foram submetidos ao teste de Kruskal-Wallis e Mann-Whitney. Os resultados mostraram infiltração microbiana em todos os grupos, não havendo diferenças significantes entre os cimentos estudados. Porém, quando se analisou os resultados dos níveis de remanescentes de obturação, entre 4 e 5 mm, e 5 e 6 mm não ocorreu diferenças significantes. Ao comparar os níveis de 4 e 6 mm pode-se constatar diferenças significantes.

ABSTRACT

This work aimed to evaluate the sealing ability of root canal filling remnants (4, 5 and 6mm), employing Sealapex and EndoFill, by means of differents microbial indicators. A platform was employed, which was split in two halves an upper chamber - where the microbial suspension (containing E. faecalis + S. aureus + P. aeruginosa + B. subtilis + C. albicans); and a lower chamber containing the culture medium Brain Heart Infusion, in which 3 mm of the apical region of teeth were kept immersed. Interpretations of the time to occur microbial leakage were made daily for 60 days, using the turbidity of the culture medium which is indicative of microbial contamination, as a reference. The data obtained were submitted to the Kruskal-Wallis and Mann-Whitney tests. The outcomes didn't show any significant difference between the sealers assessed, when the time for microbial leakage was compared, and leakage was noted in all the comparative groups. When the results of the remaining obturation level were compared, between 4 and 5 mm and 5 and 6 mm, no significant differences were found; however, when 4 and 6 mm levels were compared significant differences were noted.