title: Retention of questionable and hopeless teeth in compliant patients treated for aggressive periodontitis.
abstract: OBJECTIVE
  The aim of this study was to determine the survival rates of questionable and hopeless teeth in patients with aggressive periodontitis (AgP) and chronic periodontitis (CP) during 15 years of supportive periodontal therapy (SPT).
  
  
  METHODS
  Thirty-four AgP and 34 CP patients (SPT≥10 years) with bone loss of ≥50% at ≥2 teeth were consecutively recruited. Bone loss was measured on digitized radiographs and teeth were categorized as "questionable" (≥50 to <70% bone loss) or as "hopeless" (≥70%). Progression in pocket probing depths (PPD) during SPT, tooth loss and reasons for extraction were analysed.
  
  
  RESULTS
  In AgP patients, 262 teeth were considered as questionable and 63 as hopeless (CP: 149/51). During active periodontal therapy, 25 questionable and 26 hopeless teeth were extracted (CP: 12/16). During 15.3 ± 4.1 years of SPT of AgP 28 questionable and 15 hopeless teeth were removed (CP: 28/12). The mean tooth loss per patient during SPT in total was 0.14 (AgP) and 0.16 (CP) teeth/year. There were no significant differences in tooth loss or longitudinal progression of PPD between AgP and CP patients.
  
  
  CONCLUSIONS
  In patients with AgP, 88.2% (209 of 237) of questionable and 59.5% (22 of 37) of hopeless teeth survived 15 years during regular SPT in a dental school department.
authors.affiliation: Clinic of Conservative Dentistry and Periodontology, University of Kiel, Kiel, Germany. graetz@konspar.uni-kiel.de
authors.forename: Christian
authors.initials: C
authors.lastname: Graetz
authors.forename: Christof E
authors.initials: CE
authors.lastname: Dörfer
authors.forename: Maren
authors.initials: M
authors.lastname: Kahl
authors.forename: Thomas
authors.initials: T
authors.lastname: Kocher
authors.forename: Karim
authors.initials: K
authors.lastname: Fawzy El-Sayed
authors.forename: Jan-Frederik
authors.initials: JF
authors.lastname: Wiebe
authors.forename: Konstantin
authors.initials: K
authors.lastname: Gomer
authors.forename: Andreas
authors.initials: A
authors.lastname: Rühling
mesh_terms: D000328:Adult; D000368:Aged; D010520:Aggressive Periodontitis / Q000628:therapy*; D016301:Alveolar Bone Loss / Q000628:therapy; D055113:Chronic Periodontitis / Q000628:therapy*; D003773:Dental Plaque / Q000628:therapy; D012534:Dental Scaling / Q000379:methods; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D017823:Furcation Defects / Q000628:therapy; D016557:Guided Tissue Regeneration, Periodontal / Q000379:methods; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D057747:Periodontal Debridement / Q000379:methods; D010514:Periodontal Pocket / Q000628:therapy; D016300:Radiography, Bitewing; D012189:Retrospective Studies; D012390:Root Canal Therapy / Q000379:methods; D016745:Root Planing / Q000379:methods; D013524:Surgical Flaps; D015996:Survival Rate; D014081:Tooth Extraction / Q000706:statistics & numerical data; D016388:Tooth Loss / Q000517:prevention & control*; D016896:Treatment Outcome; D055815:Young Adult