title: Tooth loss in aggressive periodontitis after active periodontal therapy: patient-related and tooth-related prognostic factors.
abstract: OBJECTIVE
  To assess prognostic factors for tooth loss after active periodontal therapy (APT) in patients with aggressive periodontitis (AgP) at tooth level.
  
  
  METHODS
  Eighty-four patients with AgP were re-evaluated after a mean period of 10.5 years of supportive periodontal therapy (SPT). Two thousand and fifty-four teeth were entered into the model. The tooth-related factors including baseline bone loss, tooth location and type, furcation involvement (FI), regenerative therapy, and abutment status, as well as time of follow-up and other patient-related factors were tested for their prognostic value at tooth level. Multilevel regression analysis was performed for statistical analysis to identify factors contributing to tooth loss.
  
  
  RESULTS
  During SPT, 113 teeth (1.34 teeth per patient) were lost. Baseline bone loss, use as abutment tooth, tooth type, and maxillary location contributed significantly to tooth loss during SPT. Molars showed the highest risk for tooth loss after APT. Moreover, time of follow-up and the patient-related factor "educational status" significantly accounted for tooth loss at tooth level.
  
  
  CONCLUSIONS
  Baseline bone loss, abutment status, tooth location, and type as well as time of follow-up and educational status were detected as prognostic factors for tooth loss during SPT in patients with AgP at tooth level.
authors.affiliation: Section of Periodontology, Department of Conservative Dentistry Clinic for Oral, Dental and Maxillofacial Diseases, University Hospital Heidelberg, Heidelberg, Germany. amelie.baeumer@med.uni-heidelberg.de
authors.forename: Amelie
authors.initials: A
authors.lastname: Bäumer
authors.forename: Bernadette
authors.initials: B
authors.lastname: Pretzl
authors.forename: Raluca
authors.initials: R
authors.lastname: Cosgarea
authors.forename: Ti-Sun
authors.initials: TS
authors.lastname: Kim
authors.forename: Peter
authors.initials: P
authors.lastname: Reitmeir
authors.forename: Peter
authors.initials: P
authors.lastname: Eickholz
authors.forename: Bettina
authors.initials: B
authors.lastname: Dannewitz
mesh_terms: D000328:Adult; D010520:Aggressive Periodontitis / Q000150:complications / Q000628:therapy*; D016301:Alveolar Bone Loss / Q000150:complications; D015992:Body Mass Index; D000044:Dental Abutments; D003773:Dental Plaque / Q000150:complications / Q000517:prevention & control; D003777:Dental Prophylaxis; D004522:Educational Status; D005260:Female; D005500:Follow-Up Studies; D017823:Furcation Defects / Q000150:complications; D005884:Gingival Hemorrhage / Q000150:complications; D016557:Guided Tissue Regeneration, Periodontal; D006267:Health Education, Dental; D006801:Humans; D008297:Male; D008437:Maxilla / Q000473:pathology; D008963:Molar / Q000473:pathology; D017622:Periodontal Attachment Loss / Q000150:complications; D010514:Periodontal Pocket / Q000150:complications; D011379:Prognosis; D012189:Retrospective Studies; D012907:Smoking; D016388:Tooth Loss / Q000209:etiology*; D016896:Treatment Outcome; D055815:Young Adult