Authors: J. A. jr Cruz, M. S. Coelho, A. S. Kato, N. Vivacqua-Gomes, C. E. Fontana, D. G. P. Rocha, C. E. S. Bueno
Keywords: foraminal enlargement, postoperative pain, reciprocating motion, visual analog scale
Introduction: The aim of this prospective study was to evaluate the postoperative pain that followed root canal treatments performed with a single-file reciprocating system on asymptomatic uniradicular necrotic teeth with and without
Methods: Forty-six volunteers were randomly divided into 2 groups according to the established working lengths. The FE group had a working length of 0.0 mm from the apex, and the control group had a working length of 1.0 mm short
Results: Overall, 82.22% of the patients indicated no pain or mild pain. A greater proportion of the patients in the FE group reported mild pain compared with patients in the control group in the first 24 hours (P < .05). At 72 hours and 1 week, there were no statistically significant differences between the groups (P > .05).
Conclusions: FEs during endodontic treatments of asymptomatic necrotic, uniradicular teeth that were performed in single visits using the Reciproc R40 reciprocating file resulted in a low incidence of pain. After 24 hours, the FEs resulted in more patients reporting mild pain compared with the control group, but no differences were observed at 72 hours or 1 week.