RGO: Revista Gaúcha de Odontologia (Jan 2008)
Analysis of the cleaning of root canal prepared with a rotary instrument system and different chemical substances
Abstract
Objectives: To evaluate, by scanning electronic microscopy and computerized readings, cleaning of the root dentin surface – cervical, middle and apical thirds – in human mandibular incisor root canals, prepared by the rotary system K3√ENDO and different chemical substances. Methods: Among these, 2.5% sodium hypochlorite, (pH 11.0), Endo PTC cream reacting with 0.5% sodium hypochlorite (pH 11.0), using this in two different consistencies; its normal consistency (Endo PTC-N) and a less dense version (Endo-PTC-L); and a chlorhexidine (Endogel ®). When this phase ended, the groups received irrigation-aspiration with solutions of 0.5% sodium hypochlorite (pH 11.0) and 17% EDTA-T, except for the Endogel® group, which received two irrigation regimes, in one final irrigation-aspiration with 20 mL of physiological solution and in the other, irrigation with EDTA-T. After this the samples were prepared for SEM and their images were analyzed by the Scion Image program. Results: The results revealed statistically significant difference, with the Endo-PTC-L group shown to be superior to the others in the middle and apical thirds. Whereas for the Endogel group with EDTA-T irrigation, there was no statistical difference among them, only in the middle third.Conclusion: It was concluded that the substances with the vehicle polyethylene glycol and with lower viscosities offered a better standard of cleaning.
