%0 Journal Article
%T The performance of ProTaper system during the endodontic retreatment
%A Erica Lopes FERREIRA
%A Flares BARATTO FILHO
%A Rivail AntŁżnio S¨Śrgio FIDEL
%A Luiz Fernando FARINIUK
%J RSBO
%D 2006
%I University of Joinville
%X The development of new rotary instruments for endodontic treatmentdemands new studies to evaluate their efficacy on the retreatment ofroot canals. The scope of this study was to analyze the partial or total removal of the filling material by the ProTaper system in the retreatment of gutta-percha-filled root canals, as well as the time required to reach the previous working length. Thirty-six human canines were equally divided in three groups (n=12) and had their root canals prepared by the following methods: GI=Thermafill system; GII=McSpadden; GIII-lateral condensation. After that, all specimens were retreated without solvent and using the ProTaper system. The time necessary to remove the filling material was registered. After the removal of the filling material,the specimens were sectioned longitudinally and magnified images of the sections were recorded and printed. The presence or absence of remaining filling material was registered. The results showed a significant statistical difference between the McSpadden group and the others with relation to the time required for filling removal. All groups exhibited an incomplete removal of the filling material. It can be concluded that although the rapidity that the ProTaper instruments reached the working length, the system has to be associated to another retreatment.
%K endodontic retreatment
%K ProTaper
%K gutta-percha.
%U http://univille.edu.br/community/depto_odontologia/VirtualDisk.html?action=downloadFile&file=performance_sistema_protaper.pdf&current=%2FODONTOLOGIA%2FRSBO%2FRSBO_v.3_n.1_maio_2006