Ultrasonic root-end preparation in apical surgery: a prospective randomized study

ObjectiveThe purpose of this study was to evaluate the potential benefit of an ultrasonic device in apical surgery on the outcome of treatment.Study designA randomized prospective design was used in a standardized treatment protocol. Patients were allocated to treatment with an ultrasonic device (P-Max Newtron) or treatment with a bur in an otherwise similar protocol. One year after treatment the results were evaluated by 2 oral and maxillofacial surgeons who were blinded for the therapy.ResultsOut of a total group of 399 patients who were included in the study, adequate follow-up could be obtained in 290 patients. The overall success rate in the ultrasonic group was 80.5% and in the group treated with a bur 70.9% (P = .056). In molars, the difference in success rate was significant (P = .02).ConclusionThe use of an ultrasonic device in apical surgery improved the outcome of treatment. In molars this effect was significant.