title: Progression of periodontitis in a sample of regular and irregular compliers under maintenance therapy: a 3-year follow-up study.
abstract: BACKGROUND
  To our knowledge, prospective studies (matched for sex, smoking, and diabetes) that investigated the influence of compliance in the progression of periodontitis and tooth loss in periodontal maintenance therapy (PMT) programs were not previously reported.
  
  
  METHODS
  A total of 58 regular complier (RC) and 58 erratic complier (EC) individuals were recruited from a prospective cohort with 238 patients under PMT and matched by sex, diabetes, and smoking habits. A full-mouth periodontal examination that included bleeding on probing (BOP), probing depths (PDs), clinical attachment levels, and number of teeth were determined at all PMT visits during a 3-year interval. The influence of variables of interest was tested through multivariate logistic regression.
  
  
  RESULTS
  The progression of periodontitis and tooth loss was significantly lower among RC compared to EC patients. A higher progression of periodontitis was observed among EC patients who smoked. The final logistic model for the progression of periodontitis in the RC group included smoking (odds ratio [OR]: 4.2) and >30% of sites with BOP (OR: 2.8), and the final logistic model for the progression of periodontitis in the EC group included smoking (OR: 7.3), >30% of sites with BOP (OR: 3.2), PDs of 4 to 6 mm in 10% of sites (OR: 3.5), diabetes (OR: 1.9), and number of lost teeth (OR: 3.1).
  
  
  CONCLUSIONS
  RC patients presented a lower progression of periodontitis and tooth loss compared to EC patients. This result highlighted the influence of the pattern of compliance in maintaining a good periodontal status. Moreover, important risk variables such as smoking and diabetes influenced the periodontal status and should be considered when determining the risk profile and interval time for PMT visits.
authors.affiliation: Department of Periodontology, Faculty of Dentistry, Dentistry School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil. focperio@uol.com.br
authors.forename: Fernando
authors.initials: F
authors.lastname: Oliveira Costa
authors.forename: Luís Otávio
authors.initials: LO
authors.lastname: Miranda Cota
authors.forename: Eugênio José
authors.initials: EJ
authors.lastname: Pereira Lages
authors.forename: Telma Campos
authors.initials: TC
authors.lastname: Medeiros Lorentz
authors.forename: Alcione Maria
authors.initials: AM
authors.lastname: Soares Dutra Oliveira
authors.forename: Peterson Antônio
authors.initials: PA
authors.lastname: Dutra Oliveira
authors.forename: José Eustáquio
authors.initials: JE
authors.lastname: Costa
mesh_terms: D000293:Adolescent; D000328:Adult; D016301:Alveolar Bone Loss / Q000503:physiopathology / Q000517:prevention & control; D016022:Case-Control Studies; D055113:Chronic Periodontitis / Q000503:physiopathology* / Q000517:prevention & control; D015331:Cohort Studies; D003774:Dental Plaque Index; D003777:Dental Prophylaxis; D048909:Diabetes Complications / Q000503:physiopathology; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D017823:Furcation Defects / Q000503:physiopathology / Q000517:prevention & control; D005884:Gingival Hemorrhage / Q000503:physiopathology / Q000517:prevention & control; D006801:Humans; D008297:Male; D008875:Middle Aged; D009910:Oral Hygiene; D010349:Patient Compliance; D017622:Periodontal Attachment Loss / Q000503:physiopathology / Q000517:prevention & control; D010514:Periodontal Pocket / Q000503:physiopathology / Q000517:prevention & control; D011446:Prospective Studies; D012008:Recurrence; D019233:Retreatment; D018570:Risk Assessment; D012907:Smoking; D016388:Tooth Loss / Q000209:etiology; D055815:Young Adult