Evaluation of the performance of different reciprocant instruments in the retreatment of curved root canals
Keywords:
Endodontics, Reciproc, MolarAbstract
Objective: to evaluate the performance of two brands of reciprocating instruments for the retreatment of molars with curved canal, seeking to highlight the differences in the performance of the alloys in relation to strength and flexibility, as well as the potential for unblocking and widening the root canal. Method: Thirty-four artificial mandibular molars were selected, with curvature between 10-30 degrees. The sample was divided in 2 groups: the first retreated by file V-File R25 (TDKa - Brazil), and the second retreated by file Reciproc R25 (VDW- Germany). The evaluation standart was to measure the presence or absence of enlargement of the conduit, as well as the amount of residue remaining, considering the measurement of the different thirds of the mesial root through the initial and final radiographs, obtained by digital x-ray. Results: even after instrumentation with files from TDKa and VDW there was the permanence of filling material in the conduits and teeth instrumented with files from TDKa showed higher rates in the three thirds in the root. As for apical extrusions, there was a higher incidence in teeth retracted with VDW instruments. In relation to the enlargement, both instruments promoted it, however, the files of VDW present lower indexes. Conclusion: Both instruments, VDW and TDKa, present good resistance against curved canals. The instrument Reciproc- VDW presented better capacity of clearing the canal, with less additional wear, however, there was no statistically significant difference in the capacity of apical cleaning.
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