title: Influence of maintenance care in periodontally susceptible and non-susceptible subjects following implant therapy.
abstract: OBJECTIVE
  To compare the periodontal and peri-implant conditions of periodontally susceptible and periodontally healthy subjects under maintenance care for a period of at least 3 years.
  
  
  METHODS
  Sixty periodontally susceptible patients (PSP) and 56 periodontally non-susceptible subjects (PHS) were treated with dental implants in the National Dental Centre Singapore (NDCS) and were maintained in a regular supportive periodontal care program for a mean of 6 years. Full mouth bleeding on probing (BoP), full mouth probing pocket depths (PPD), implant loss, and absence of crestal bone loss were recorded at the time of prosthesis delivery and following a mean follow-up of 6 years 2 months.
  
  
  RESULTS
  Although there were significant differences in the BoP and the percentage of subjects with tooth probing pocket depth ≥5 mm between PSP and PHS at the time of implant prosthesis installation (T0), there were no significant differences between the two subject groups in the various parameters assessed at the follow-up visit (T1) (total number of teeth, percentage of subjects with implant probing pocket depth ≥5 mm, percentage of subjects with implant probing pocket depth ≥ 6 mm, absence of crestal bone loss, implant loss).
  
  
  CONCLUSIONS
  Owing to a rigid regular SPT program, implants placed in PSP perform equally well when compared to implants installed in PHS over a mean period of 6-year follow-up.
authors.affiliation: National Dental Centre Singapore, Singapore, Singapore.|The Dental Studio, Singapore Medical Group, Singapore, Singapore.
authors.forename: Wah Ching
authors.initials: WC
authors.lastname: Tan
authors.affiliation: National Dental Centre Singapore, Singapore, Singapore.
authors.forename: Marianne M A
authors.initials: MM
authors.lastname: Ong
authors.affiliation: National Dental Centre Singapore, Singapore, Singapore.|The University of Hong Kong, Hong Kong, China.|University of Zurich, Zurich, Switzerland.|University of Berne, Berne, Switzerland.
authors.forename: Niklaus P
authors.initials: NP
authors.lastname: Lang
mesh_terms: D000328:Adult; D000368:Aged; D000540:Alveolar Ridge Augmentation; D003733:Dental Caries Susceptibility; D003757:Dental Implantation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009910:Oral Hygiene; D010518:Periodontitis / Q000517:prevention & control*; D011183:Postoperative Complications / Q000517:prevention & control*
keywords: compliance; implant dentistry; periodontally healthy subjects; periodontally susceptible patients; residual probing depth