title: Clinical effectiveness of basic root canal treatment after 24 months: a randomized controlled trial.
abstract: BACKGROUND
  The purpose of this study was to investigate the effectiveness of basic root canal treatment (BRT) with tactile working length determination in terms of radiographic and clinical outcome parameters compared with endodontic treatment with standard radiographic working length control.
  
  
  METHODS
  This was a clinical, multicenter, controlled, open-label trial to evaluate BRT effectiveness after 24 months. The primary end point was the apical extension score of the radiographic quality parameter of root canal fillings. The secondary radiographic end point was the periapical index, and the secondary clinical end point was tooth tender to percussion. The safety end point was tooth loss as a consequence of endodontic failure. Statistical analyses of binary and categoric data were calculated using cross tables and the chi-square test.
  
  
  RESULTS
  BRT with tactile working length determination compared with standard radiographic working length control did not significantly differ in terms of radiographic and clinical outcomes after 24 months. The apical extension of the root canal fillings and the periapical anatomic structures showed no significant differences according to radiographic analyses (P = .5). Corresponding results were found in clinical aspects of tooth tender to percussion (P = .6) and tooth loss (P = .7).
  
  
  CONCLUSIONS
  Tactile working length determination in BRT resulted in comparable treatment outcomes compared with standard endodontic treatment with radiographic working length control and turned out to be an accurate method in BRT.
authors.affiliation: Department of Operative and Preventive Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany.
authors.forename: Rainer A
authors.initials: RA
authors.lastname: Jordan
authors.affiliation: Department of Operative and Preventive Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany. Electronic address: aholzner@dent.uni-erlangen.de.
authors.forename: Anna L
authors.initials: AL
authors.lastname: Holzner
authors.affiliation: Department of Operative and Preventive Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany.
authors.forename: Ljubisa
authors.initials: L
authors.lastname: Markovic
authors.affiliation: Department of Operative and Preventive Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany.
authors.forename: Inga
authors.initials: I
authors.lastname: Brueckner
authors.affiliation: Department of Operative and Preventive Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Zimmer
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging; D003793:Dental Restoration, Permanent / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008689:Methacrylates / Q000737:chemistry; D008875:Middle Aged; D010474:Percussion; D010486:Periapical Tissue / Q000000981:diagnostic imaging; D011671:Pulpitis / Q000628:therapy; D011859:Radiography; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000379:methods; D012390:Root Canal Therapy / Q000379:methods* / Q000592:standards; D019227:Tooth Apex / Q000000981:diagnostic imaging; D016388:Tooth Loss / Q000209:etiology; D014098:Toothache / Q000209:etiology; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D003188:Composite Resins; D003764:Dental Materials; C509998:Grandio; D008689:Methacrylates; D019279:Resin Cements; D012387:Root Canal Filling Materials; C512545:futurabond NR
keywords: Clinical trial; dental pulp cavity; dental pulp diseases; endodontics; treatment outcome