Estudio in vitro aleatorizado de la capacidad de obturación de Guttacore y Thermafil Plus mediante cortes transversalesArtículo ganador del Premio al Mejor Artículo Científico Universidades de la CAM 2014

Abstract

The success of the root canal treatment takes of in a suitable cleaning, shaping and obturation of the root canal system. Aim: To compare the PGFA (percentage of guttapercha-filled area) obtained by Guttacore and Thermafil Plus obturation systems using histologic sections. Metodology: a randomized in vitro trial was done on 23 canals in which the angle of curvature was between 21-40º. The instrumentation was done untill a 30.04 file reach the working lenght. After the final irrigation activated with ultrasound, canals were obturated with Thermafil Plus and Guttacore obturation systems. horizontal sections were cut 2, 5 and 8mm from the apical foramen of each tooth. The crosssectional area of the samples were taken under photographs to 2.5x increases. The PGFA was calculated. Results: All the canals obtained more than 95% in average of PGFA (Guttacore: 98,16% at 2 mm, 96,77% at 5 mm and 98,46% at 8 mm; Thermafil: 98,73% at 2 mm, 98,89% at 5 mm and 100% at 8 mm). Significant differences were found between the grups in the cross-sectional area at 8 mm (p=0,011). Conclusions: 1) Thermafil plus gets significantly higher values of PGFA in the crosssectional area at 8 mm. 2) No significant difference was found between 2 and 5 mm 3) Other studies about comparation of Guttacore are needed.