Il ruolo della strumentazione meccanica nei ritrattamenti endodontici

The success of orthograde endodontic retreatment depends on many factors, including correct and complete removal of old filling material from the root canal. The specific NiTi endodontic rotary instruments (taper .05) we used are very sharp at the level of the blades and the tip, and they allow rapid, safe removal of commonly used endodontic filling materials, even in the presence of a plastic carrier. As illustrated by the two cases presented, we used NiTi endodontic rotary instruments specifically designed for retreatment in the coronal two thirds of the canal, manual instruments in the apical third, and simultaneous technique after the filling material had been removed. This approach allowed acceptable preservation of the original anatomy of the canal and effective sealing by the new filling material.