One-appointment root canal treatment: incidence of postoperative pain using a modified double-flared technique

A clinical study of maxillary central incisors was conducted in order to evaluate the incidence of postoperative pain following one-appointment root canal treatment using a modification of the double-flared technique to prepare the root canal system. Sixty teeth with necrotic pulps, from 52 patients whose ages ranged from 10 to 53 years, were included. Half of the teeth were prepared by the double-flared technique, while the other half were prepared by a modification of this technique. No difference was observed in the incidence of postoperative pain between the two groups.