title: Success and failure in periradicular surgery: a longitudinal retrospective analysis.
abstract: The objective of the present study was to compare the success rates of 2 different periapical surgical techniques, the traditional technique with rotary instruments and the ultrasonic technique, which uses ultrasonic retrotips. A longitudinal retrospective study was carried out on 302 apices (181 teeth) that had undergone periapical surgery. Surgical outcome was evaluated by 2 independent operators using standardized periapical radiographs. Each radiographic finding was classified into 1 of 4 groups: complete healing, incomplete healing, uncertain healing, and unsatisfactory outcome (failure). An SAS statistical analysis system was used for data management and analysis. Prognostic factors were determined by means of the Fisher exact test. Complete healing after 4.6 years (the average follow-up period) was observed in 68% of the teeth treated through the use of the standard technique and 85% of those treated through the use of the ultrasonic technique. The success rate increased as the follow-up period lengthened (68.4% at 2 years vs 80% at 6 years). The success rate was higher in maxillary (77.9%) than in mandibular (66.1%) teeth. A comparison between the retrofilling materials was not feasible because all teeth in the standard technique group were retrofilled with amalgam and all teeth in the ultrasonic group were retrofilled with Super-EBA.
authors.affiliation: School of Dentistry, S. Paolo Hospital, University of Milan, Italy.
authors.forename: T
authors.initials: T
authors.lastname: Testori
authors.forename: M
authors.initials: M
authors.lastname: Capelli
authors.forename: S
authors.initials: S
authors.lastname: Milani
authors.forename: R L
authors.initials: RL
authors.lastname: Weinstein
mesh_terms: D000328:Adult; D001047:Apicoectomy; D001641:Bicuspid / Q000601:surgery; D003723:Dental Amalgam; D003755:Dental High-Speed Technique / Q000295:instrumentation; D017220:Dentin-Bonding Agents; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008963:Molar / Q000601:surgery; D012184:Retrograde Obturation / Q000379:methods*; D012189:Retrospective Studies; D012387:Root Canal Filling Materials; D018915:Root Canal Preparation / Q000295:instrumentation*; D016896:Treatment Outcome; D014464:Ultrasonic Therapy / Q000295:instrumentation
chemical_list: D017220:Dentin-Bonding Agents; D012387:Root Canal Filling Materials; D003723:Dental Amalgam; C084074:Super EBA