Objective: The purpose of this study was to evaluate the potential benefit of an ultrasonic device in apical surgery on the outcome of treatment.
Study Design: A 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.
Results: Out 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).
Conclusion: The use of an ultrasonic device in apical surgery improved the outcome of treatment. In molars this effect was significant.
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