title: Clinical Outcomes after Intentional Replantation of Periodontally Involved Teeth.
abstract: BACKGROUND
  Periodontal involvement has been thought to be a contraindication for intentional replantation. This retrospective study aimed to assess clinical outcomes after intentional replantation of teeth with periodontal involvement and to explore potential predictors of outcomes.
  
  
  METHODS
  Teeth with a history of intentional replantation between March 2000 and December 2014 and with 1 or 2 preoperative periodontal pockets ≥6 mm among 6 sites evaluated per tooth were included. A total of 103 teeth were included, and 74 teeth were followed up for more than 6 months. Outcomes were assessed as improved (a decrease in the number and depths of periodontal pockets and the size of periapical radiolucency and no external root resorption or sign/symptoms) or failed. Data were analyzed with Kaplan-Meier survival analysis and a Cox proportional regression model.
  
  
  RESULTS
  Cumulative improved rates declined from 89% at 1 year to 68% at 4 years. A Cox proportional regression model identified the patient's age (P = .049; hazard ratio, 2.552) and the number of preoperative periodontal pockets with a depth ≥6 mm (P = .041; hazard ratio, 2.523) as predictors of outcomes in the replantation of periodontally involved teeth.
  
  
  CONCLUSIONS
  Periodontal involvement is not an absolute contraindication to intentional replantation. The teeth with 1 preoperative periodontal pocket ≥6 mm and the subjects aged ≤40 years had 2.5 times and 2.6 times lower probability of failure, respectively, than the teeth with 2 pockets and the subjects aged >40 years. Therefore, these factors need to be carefully considered for intentional replantation.
authors.affiliation: Department of Dentistry and Institute for Translational and Clinical Research, International St Mary's Hospital, Catholic Kwandong University, Incheon, Korea.
authors.forename: Sin-Yeon
authors.initials: SY
authors.lastname: Cho
authors.affiliation: Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, Korea. Electronic address: sjlee@yuhs.ac.
authors.forename: Seung-Jong
authors.initials: SJ
authors.lastname: Lee
authors.affiliation: Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, Korea. Electronic address: andyendo@yuhs.ac.
authors.forename: Euiseong
authors.initials: E
authors.lastname: Kim
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D010510:Periodontal Diseases / Q000150:complications / Q000601:surgery*; D010514:Periodontal Pocket / Q000150:complications / Q000601:surgery; D012189:Retrospective Studies; D014090:Tooth Replantation / Q000379:methods; D016896:Treatment Outcome
keywords: Age; intentional replantation; number of periodontal pockets; outcome; periodontal involvement