Estudio in vitro del sellado de conductos obturados con gutapercha y sellador AH26 mediante la técnica de la condensación lateral de la gutapercha en frio

Laburpena

Forty two uniconductal human teeth root canal treatment were made in vitro using lateral condensation of guttapercha and sealer AH 26. Lack of adaptation of obturating materials to the dentinal walls was studied paying attention to viscosity of sealer and the smear layer. Teeth were cleared and examined with magnification. According to obturation appearance, we identify the correct seal whether sealer covers completely the root canal, and classify as wrong seal the presence of guttapercha breaking the sealer uniformity. The data was statistically evaluated using a ANOVA test and Tukey¿s test. Analysis of data shows the following results: 1. Complete obturation of the root canals with lateral condensation of guttapercha technique and sealer AH26 mixed in such experimental ways is not possible. 2. Lateral condensation tecnique drives to a loss of sealer. 3. Lack of fittness between obturation materials and root canal walls appears in apical, middle and coronal third. 4. Apical third is the zone that less times reaches a correct seal. 5. The thicker viscosity of sealer AH 26 (0,6 g powder per 0,3 g epoxy resin) the more frecuence to get a wrong seal. 6. A lower mixing ratio of sealer AH 26 (0,4 g powder per 0,3 g epoxy resin) gives sometimes a correct seal. 7. Elimination of smear layer does not get better the seal whether the sealer viscosity is used in such experimental ways. 8. Lateral condensation of guttapercha technique along with AH 26 sealer mixed according these expermiental densities is, per se, a cause of filtration without the need of further cicumstances.