title: Periodontal maintenance in a specialist periodontal clinic and in general dental practice.
abstract: OBJECTIVE
  To monitor the efficacy of periodontal maintenance whether conducted in a specialist periodontology clinic or in the practice of the referring general dentist.
  
  
  METHODS
  Thirty-five subjects with a diagnosis of moderate-severe chronic periodontitis who were referred to the specialist clinic received periodontal non-surgical therapy. Following a 6-month healing phase, subjects were randomly allocated to one of two groups: A (n=18, periodontal maintenance provided within the specialist clinic) or B (n=17, periodontal maintenance provided by the referring general dentist in accordance with written instructions provided by the specialist). All subjects were examined at months 0 (corresponding to 6 months post-completion of non-surgical therapy), 6 and 12. Full-mouth plaque index (PI), % bleeding on probing (%BOP) and probing depth (PD) measurements were recorded. PDs were also recorded at eight test sites which, prior to non-surgical therapy, exhibited PD 5-8 mm, BOP and radiographic alveolar bone loss. Standardized radiographs were exposed at test sites at months 0 and 12, and bone changes assessed using digital subtraction radiography (DSR).
  
  
  RESULTS
  As a result of the non-surgical therapy, statistically significant improvements in all clinical parameters were recorded. In the maintenance period, mean PI increased significantly from months 0 to 12 (p<0.05), but this increase did not differ significantly between groups A and B (p>0.05). No other clinical parameters changed significantly in the maintenance phase of the study. Reductions in %BOP, mouth mean PD and mean test sites PD achieved by the non-surgical therapy were maintained and did not differ significantly whether subjects were allocated to group A or group B (p>0.05). Current smokers had significantly deeper PD than non-smokers and former smokers at all time points (p<0.05), although otherwise, smoking status did not affect the outcomes of the study. DSR analysis identified statistically non-significant, slight, alveolar bone loss in both groups between months 0 and 12.
  
  
  CONCLUSIONS
  In the short term, periodontal maintenance can be provided in general dental practice with the same expected outcomes compared with maintenance that is provided in a specialist clinic, providing that general dentists are given specific instructions regarding the maintenance regimen. A strong emphasis on effective plaque control is necessary.
authors.affiliation: School of Dental Sciences, University of Newcastle upon Tyne, Framlington Place, Newcastle upon Tyne, UK. p.m.preshaw@ncl.ac.uk
authors.forename: Philip M
authors.initials: PM
authors.lastname: Preshaw
authors.forename: Peter A
authors.initials: PA
authors.lastname: Heasman
mesh_terms: D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000517:prevention & control; D003773:Dental Plaque / Q000517:prevention & control; D003774:Dental Plaque Index; D005260:Female; D005500:Follow-Up Studies; D005792:General Practice, Dental; D005884:Gingival Hemorrhage / Q000517:prevention & control; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D010512:Periodontal Index; D010514:Periodontal Pocket / Q000517:prevention & control; D010517:Periodontics; D010518:Periodontitis / Q000517:prevention & control* / Q000628:therapy; D011859:Radiography; D012907:Smoking; D013382:Subtraction Technique; D016896:Treatment Outcome