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This study compared the efficacy of two different irrigation activation systems (XP-endo Finisher and EndoActivator) used in root canal treatment. It included teeth that had previously undergone root canal treatment but had a chronic inflammatory lesion at the root tip (chronic apical periodontitis) and needed retreatment. It was a trial without an assigned phase and has been completed.
The summary above is a plain-language rendering of the official record. The original English title is shown for reference.
Criteria are reproduced from the ClinicalTrials.gov record in the original English. Only the trial team can determine eligibility.
Inclusion Criteria: * root canal-treated teeth exhibiting clinical and radiographic evidence of chronic apical periodontitis lesions. * Teeth with post-treatment apical periodontitis had endodontic therapy completed more than 2 years earlier and required retreatment. * Radiographically, the diameter of the periapical radiolucency ranged from 2 to 7 mm. * Termini of the root canal fillings ranged from 0-4 mm short of the radiographic apex, with no overfilling. * The teeth had intact coronal restorations, with no obvious exposure of the root-filling material to the oral cavity. * Selected teeth had enough crown structure for adequate isolation with a rubber dam and showed an absence of periodontal pockets or attachment level deeper than 4 mm. Exclusion Criteria: * teeth from patients who had received antibiotics within the previous 3 months or who had any general disease, teeth that could not be properly isolated with rubber dam, teeth with absence of coronary sealing, teeth with periodontal pocket depth \>4 mm; and teeth with crown/root fracture. Only one tooth was included from each patient.