Antibacterial effect of root canal preparation and calcium hydroxide paste (Calen) intracanal dressing in primary teeth with apical periodontitis

Abstract

he aim of this study was to evaluate the antibacterial action of root canal mechanical preparation using 2.5% sodium hypochlorite as the irrigating solution and a calcium hydroxide paste as the antibacterial intracanal dressing in human primary teeth root canals with pulp necrosis and apical periodontitis by means of microbial culture. A total of 26 root canals of human primary teeth with pulp necrosis and apical periodontitis were used. Samples were collected before, 72h after biomechanical treatment and 72h after removal of the intracanal dressing. Comparison by Wilcoxon test showed that root canal mechanical preparation effectively eliminated all microorganisms in 20% of the root canals, and the intracanal dressing in 62.5%; however, the cumulative action of biomechanical treatment and intracanal dressing eliminated the microorganisms of 70% of the root canals (p<0.001). Isolated root canal mechanical preparation presented poorer microbiological results that those obtained with root canal mechanical preparation and the use of an intracanal dressing indicating the necessity of topical application of an intracanal medication between sessions in primary teeth with pulp necrosis and apical periodontitis. Uniterms: Tooth, deciduos; Apical periodontitis; Root canal preparation; Calcium hydroxide. objetivo do presente estudo foi avaliar, por meio de cultura bacteriológica, a ação antibacteriana do preparo biomecânico utilizando como solução irrigadora o hipoclorito de sódio a 2,5% e da pasta Calen utilizada como curativo de demora em canais radiculares de dentes decíduos de humanos com necrose pulpar e lesão periapical. Foram selecionados 26 dentes decíduos de humanos portadores de necrose pulpar e lesão periapical. As colheitas microbiológicas foram efetuadas antes e 72 horas após o preparo biomecânico e 72 horas após a remoção do curativo de demora. A comparação por meio do teste de Wilcoxon mostrou que o preparo biomecânico foi eficaz na eliminação dos microrganismos dos canais radiculares em 20% dos casos e o curativo de demora em 62,5%, enquanto que a ação cumulativa do preparo biomecânico e do curativo de demora eliminou os microrganismos em 70,0% dos casos (p<0.001). Pôde-se concluir que o preparo biomecânico, isoladamente, apresentou resultados microbiológicos inferiores àqueles obtidos quando o mesmo foi associado ao curativo de demora, mostrando a necessidade de aplicação tópica de um curativo de demora entre sessões em dentes decíduos portadores de necrose pulpar e lesão periapical. Unitermos: Dente decíduo; Periodontite periapical; Preparo de canal radicular; Hidróxido de cálcio. 351J Appl Oral Sci. 2005;13(4):351-5

Antibacterial activity of root canal filling materials for primary teeth: zinc oxide and eugenol cement, Calen paste thickened with zinc oxide, Sealapex and EndoREZ

“…The antibacterial activity of Calen paste has been extensively demonstrated (4,5,14,17). In the present study, the Calen paste presented antibacterial activity against all test microorganisms with the diameters of the zones of bacterial growth inhibition ranging from 12.33 to 20.67 mm.…”

“…The endodontic infection in primary teeth with pulp necrosis and apical periodontitis is of polymicrobial nature with predominance of anaerobic bacteria (1), which are disseminated within the root canal system these microorganisms may persist even after biomechanical preparation and use of intracanal dressing (4), root canal filling materials should be able to eliminate residual pathogens, neutralize their toxic products and prevent canal reinfection to in order to create a favorable environment for the healing process to proceed (5). It is therefore important that root canal filling materials used in primary teeth have antimicrobial activity (6)(7)(8)(9)(10)(11) and the antimicrobial spectrum of action of these materials should be investigated.…”

Comparative Evaluation of Calcium Hydroxide and Zinc Oxide Eugenol as Root Canal Filling Materials for Primary Molars: A Clinical and Radiographic Study

“…[14][15][16][17] Calcium hydroxide is a material that has been used virtually as a panacea in dentistry. Its antibacterial properties 18 (attributed to its alkaline pH), resorbable nature 19 and osteogenic potential 20 are well-known. This material has been widely used in permanent teeth 21 but it is only recently that calcium hydroxide has been utilized for filling primary root canals.…”

Performance de diferentes métodos de instrumentação radicular em dentes decíduos humanos e artificiais avaliado pela tomografia computadorizada por feixe cônico

“…A idéia desse estudo foi mudar o enfoque de grande parte dos trabalhos de endodontia de dentes decíduos, que buscam, na maioria das vezes, salientar a ação antisséptica dos materiais obturadores (Ballesio et al, 2002;Takushige et al, 2004;Faria et al, 2005;Cerqueira et al, 2008). Novos conceitos e propostas sobre instrumentação radicular compatíveis com as características anatomopatológicas dos dentes decíduos seriam interessantes de serem estudadas (Silva et al, 2004;Kummer et al, 2008).…”

“…Isso porque os microorganismos, juntamente com as toxinas que irão permanecer na região não manipulada, podem se difundir para os tecidos periodontais, resultando na destruição do osso alveolar adjacente (Goerig;Camp, 1983;Faria et al, 2005;Kummer et al, 2008). Além disso, a necessidade pela busca de materiais obturadores mais biológicos (Hauman;Love, 2003;Assed et al, 2005;Waterhouse, 2008) catalisam ainda mais essa questão.…”