They found that techniques using thermally softened gutta-percha offer better results when compared to cold lateral compaction technique. Bousselta F & al assessed apical micro-leakage of three filling techniques: cold lateral compaction, thermo-mechanical filling, and a system with a Thermafil-comparable transporter covered with gutta-percha. He found that this last technique offered greater resistance to micro-leakage, when compared to the two former. No statistically significant difference was found between results of the two previously mentioned techniques.
Bousselta F y col. evaluaron la microfiltración apical de tres técnicas de obturación; compactación lateral en frío, obturación termomecánica y un sistema con un acarreador cubierto con gutapercha comparable con Thermafil, encontrando que este último brindaba mayor resistencia a la filtración que las dos primeras técnicas, y entre éstas, no se encontró diferencia estadísticamente significativa.