SciELO - Scientific Electronic Library Online

vol.24 número3Assessment of the tip surface of gutta-percha cones after different cutting methodsSystematic review of lymphoma in oral cavity and maxillofacial region índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados




  • Não possue artigos citadosCitado por SciELO

Links relacionados

  • Não possue artigos similaresSimilares em SciELO


Acta Odontológica Latinoamericana

versão On-line ISSN 1852-4834


DE LA CASA, María Luisa; SAEZ, María del Milagro; LOPEZ, Gabriela  e  LOPEZ, María Elena. Effect of calcium hydroxide pastes on uninstrumented canal wall studied with scanning electron microscopy. Acta odontol. latinoam. [online]. 2011, vol.24, n.3, pp.240-244. ISSN 1852-4834.

Calcium hydroxide (Ca(OH)2) paste has been used as a root canal dressing for long time and promotes healing of vital pulp and periapical tissues. The aim of this study was to evaluate the dissolving effect of calcium hydroxide paste mixed with different vehicles on uninstrumented canal walls using scanning electron microscopy (SEM). Twenty one recently extracted single-root teeth were used. The crowns were removed and the root sections were divided longitudinally into two halves. The pulp tissue was removed and the specimens were randomly divided into 7 groups. The control group was immediately fixed without any treatment. The canals in the other groups were filled with the different calcium hydroxide pastes: group 1(n=6), with saline solution; group 2 (n=6) with propylene glycol; group 3 (n=6) with propylene glycol and camphorated p-monochlorophenol; group 4 (n=6) with sodium hypochlorite; group 5 (n=6) with chorhexidine 1%, group 6 (n=6) with iodine potassium iodide 0.1/0.2%. The specimens were kept in an incubator at 100% humidity and 37ºC, removed after 14 days, and washed ultrasonically for 10 min. Then they were fixed with glutaraldehyde and examined with scanning electron microscopy The percentage of organic remains and paste were evaluated and scored. The data were analyzed using the Kruskal- Wallis test. In groups 1, 5 and 2 there were more cavities without organic remains than in the other groups (p<0.05). However, there was no difference among them (p>0.05). The paste in group 3 cleaned only 5%. In groups 4, 6 and 7 (control) the canals walls were wholly covered with fiber, cells, and residual paste, the percentage cleaned was 0. This study shows that Ca(OH)2 pastes with saline solution, with chlorhexidine and with propylene glycol have a greater dissolving effect on the canal walls than the other pastes evaluated.

Palavras-chave : Calcium hydroxide; Chlorhexidine.

        · resumo em Espanhol     · texto em Inglês     · Inglês ( pdf )


Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons