RESUMEN
Adequate root canal sealing is essential for the success of endodontic treatment. There are numerous techniques available; identifying simple and efficient techniques is important to provide good patient care. The purpose of the study was to compare the maximum penetration depth and the percentage of sealant penetration of an endodontic sealer into dentine tubules using cold lateral condensation, continuous wave, and hybrid techniques, and to contrast the effectiveness of two different tapered gutta-percha master cones (0.02 and 0.04). A sample of sixty single root teeth was used. Six experimental groups were formed from the three filling techniques and the two tapered master cones. Images were acquired using a confocal laser scanning microscope. In the apical root third, the penetration percentage was higher in the hybrid compared with the continuous wave technique. The results indicated a higher penetration depth of hybrid compared with cold lateral condensation in the middle and coronal thirds, and in the apical third, a higher penetration was identified in the hybrid group compared with the continuous wave group. No significant differences in penetration were found comparing 0.02 with 0.04 taper gutta-percha groups. The coronal cross-sections presented a higher penetration than the apical third sections. In conclusion, the hybrid technique a had higher maximum sealer penetration than the continuous wave in the apical third, and the coronal third hybrid and continuous wave had a higher penetration than cold lateral condensation.
RESUMEN
Objetivo: El propósito de este trabajo fue medir y comparar in vitro la microinfiltración apical del colorante de nitrato de plata en conductos radiculares obturados con tres sistemas diferentes: gutapercha normalizada/ AHPlus (GN/AHP); gutapercha de conicidad aumentda /AHPlues (GCA/AHP) y Resilon/Epiphany (R/E). Material y Métodos: Se utilizaron 40 raíces de dientes humanos extraídos. Las raíces se dividieron aleatoriamente en tres grupos experimentales y dos grupos de control. Los conductos fueron preparados biomecánicamente y obturados mediante la técnica de condensación lateral en frío con los 3 sistemas a estudio. Después de estar en una estufa durante 7 días (37ªC, 100% humedad), los especímenes fueron inmersos en nitrato de plata al 50% y sus cortes transversales de 1mm. De grosor, fueron observados a 40x aumentos. Resultados: El grupo I (GN/AHP) infiltró una media de 3mm; el grupo II (GCA/AHP) 2,3 mm y el grupo III (R/E) 2,1 mm. El estudio estadístico basado en el test de Anova indica que no hubo diferencias significativas en la infiltración apical entre los 3 sistemas estudiados (AU)
Objective: The aim of this study was to evaluate and compárate in vitro the apical microleakage of the silver nitrate colorant in root canal with three different obturation systems; Standardized gutta-percha/(AYPlus (SG/AHP); great taper gutta-percha/AHPlus (GTG/AHP) and Resilon/Epiphany (R/E). Materials and Methods: forty roots of extracted teeth were selected. The roots were randomly divided into three experimental groups and two control groups. The root canals were biomechanical prepared and filled with cold lateral condensation with the three study obturation systems. After seven days in an oven (37ºC, 100% humidity), the roots were immersed in 50% silver nitrate, and the transversal cross-section at 1mm, were observed at 40x magnification. Results: Group I (SG/AHP) leakage a mean value of 3mm; group II (GTG/AHP) 2,3 mm, and group III (R/E) 2,1 mm, Styatistic study Based on Anova test, there were no significative difference. Conclusions: R/E was the system with less apical leakage and SG/AHP obtained the higher value. There was no statiscally significant difference in apical leakage among the three obturation systems (AU)