title: Parameters affecting tooth loss during periodontal maintenance in a Greek population.
abstract: BACKGROUND
  Investigators have evaluated predictive parameters of tooth loss during the maintenance phase (MP). The authors conducted a retrospective study to evaluate the rate of tooth loss and to explore the parameters that affect tooth loss during MP in a Greek population.
  
  
  METHODS
  A periodontist administered periodontal treatment and maintenance care to 280 participants with severe periodontitis for a mean period +/- standard deviation of 10.84 +/- 2.13 years. The periodontist recorded the following parameters for each participant: oral hygiene index level, simplified gingival index level, clinical attachment level, probing depth measurements, initial tooth prognosis, smoking status, tooth loss during active periodontal treatment and MP, and compliance with suggested maintenance visits.
  
  
  RESULTS
  The authors found that total tooth loss during active treatment (n = 1,427) was greater than during MP (n = 918) and was associated with the initial tooth prognosis, tooth type group, participants' compliance with suggested maintenance visits, smoking status and acceptability of the quality of tooth restorations. Most of the teeth extracted during maintenance had an initial guarded prognosis (n = 612). Participants whose compliance was erratic had a greater risk of undergoing tooth extraction than did participants whose compliance was complete.
  
  
  CONCLUSIONS
  Participants' initial tooth prognosis, tooth type, compliance with suggested maintenance visits and smoking status affected tooth loss during MP. Initial guarded prognosis and erratic compliance increased the risk of undergoing tooth extraction during maintenance.
  
  
  CONCLUSIONS
  Determining predictive parameters for disease progression and tooth loss provides critical information to clinicians so that they can develop and implement rational treatment planning.
authors.affiliation: Department of Periodontics, School of Dentistry, University of Athens, Greece. atsami@dent.uoa.gr
authors.forename: Alexandra
authors.initials: A
authors.lastname: Tsami
authors.forename: Eudoxie
authors.initials: E
authors.lastname: Pepelassi
authors.forename: George
authors.initials: G
authors.lastname: Kodovazenitis
authors.forename: Mado
authors.initials: M
authors.lastname: Komboli
mesh_terms: D000328:Adult; D001641:Bicuspid / Q000473:pathology; D003481:Cuspid / Q000473:pathology; D003793:Dental Restoration, Permanent / Q000145:classification; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D005544:Forecasting; D017823:Furcation Defects / Q000000981:diagnostic imaging; D006115:Greece; D006801:Humans; D007180:Incisor / Q000473:pathology; D008297:Male; D008875:Middle Aged; D008963:Molar / Q000473:pathology; D009911:Oral Hygiene Index; D010349:Patient Compliance; D017622:Periodontal Attachment Loss / Q000145:classification; D010512:Periodontal Index; D010514:Periodontal Pocket / Q000145:classification; D010518:Periodontitis / Q000517:prevention & control*; D011379:Prognosis; D016300:Radiography, Bitewing; D012189:Retrospective Studies; D012307:Risk Factors; D012907:Smoking; D014081:Tooth Extraction; D016388:Tooth Loss / Q000209:etiology*