title: Comparison of clinical outcome of periapical surgery in endodontic and oral surgery units of a teaching dental hospital: a retrospective study.
abstract: OBJECTIVE
  The aims of this retrospective study were (1) to compare the outcome of periapical surgery performed in endodontic and in oral surgery units of a teaching dental hospital and (2) to evaluate the influence of factors affecting outcome.
  
  
  METHODS
  A total of 176 teeth (endodontic unit, 83; oral surgery unit, 93) surgically treated more than 4 years previously were examined clinically and radiographically by means of strict criteria. Multiple logistic regression analysis was used.
  
  
  RESULTS
  The rate of complete healing for patients treated in the endodontic unit (37.4%) was significantly (P = .009) higher than that for patients treated in the oral surgery unit (19.4%). The technical quality of surgery (P < .001), placement of root-end filling (P = .039), absence of a preoperative periapical lesion (P = .042), absence of a post (P = .047), and presence of an adequate coronal restoration (P = .056, odds ratio = 3.71) had significant effects on treatment outcome.
  
  
  CONCLUSIONS
  The technical quality of periapical surgery, the presence of a periapical lesion, and adequate apical and coronal seal are important prognostic determinants of successful periapical surgery.
authors.affiliation: Department of Conservative Dentistry, University College London, London, United Kingdom.
authors.forename: S
authors.initials: S
authors.lastname: Rahbaran
authors.forename: M S
authors.initials: MS
authors.lastname: Gilthorpe
authors.forename: S D
authors.initials: SD
authors.lastname: Harrison
authors.forename: K
authors.initials: K
authors.lastname: Gulabivala
mesh_terms: D000328:Adult; D002985:Clinical Protocols; D003793:Dental Restoration, Permanent; D003796:Dental Service, Hospital; D004499:Education, Dental, Graduate; D004708:Endodontics; D005260:Female; D005500:Follow-Up Studies; D006784:Hospitals, Teaching; D006801:Humans; D016015:Logistic Models; D008131:London; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D016017:Odds Ratio; D010483:Periapical Diseases / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D010513:Periodontal Ligament / Q000000981:diagnostic imaging / Q000503:physiopathology; D011379:Prognosis; D011859:Radiography; D012189:Retrospective Studies; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation; D012390:Root Canal Therapy / Q000379:methods* / Q000592:standards; D013223:Statistics as Topic; D018709:Statistics, Nonparametric; D013515:Surgery, Oral; D016896:Treatment Outcome; D014945:Wound Healing
chemical_list: D012387:Root Canal Filling Materials