title: Periimplant diseases: where are we now?--Consensus of the Seventh European Workshop on Periodontology.
abstract: BACKGROUND
  Peri-implant diseases present in two forms - peri-implant mucositis and peri-implantitis.
  
  
  METHODS
  The literature was systematically searched and critically reviewed. Four manuscripts were produced in specific topics identified as key areas to understand the microbial aetiology and the pathogenesis of peri-implant diseases and how the implant surface structure may affect pathogenesis.
  
  
  RESULTS
  While peri-implant mucositis represents the host response of the peri-implant tissues to the bacterial challenge that is not fundamentally different from gingivitis representing the host response to the bacterial challenge in the gingiva, peri-implantitis may differ from periodontitis both in the extent and the composition of cells in the lesion as well as the progression rate. A self-limiting process with a "protective" connective tissue capsule developing appears to dominate the periodontitis lesion while such a process may occasionally be lacking in peri-implantitis lesions. Bacterial biofilm formation on implant surfaces does not differ from that on tooth surfaces, but may be influenced by surface roughness. Nevertheless there is no evidence that such differences may influence the development of peri-implantitis.
  
  
  CONCLUSIONS
  It was agreed that clinical and radiographic data should routinely be obtained after prosthesis installation on implants in order to establish a baseline for the diagnosis of peri-implantitis during maintenance of implant patients.
authors.affiliation: Prince Phillip Dental Hospital, The University of Honk Kong, Hong Kong SAR, China. nplang@dial.eunet.ch
authors.forename: Niklaus P
authors.initials: NP
authors.lastname: Lang
authors.forename: Tord
authors.initials: T
authors.lastname: Berglundh
mesh_terms: D016301:Alveolar Bone Loss / Q000209:etiology* / Q000382:microbiology; D018407:Bacterial Physiological Phenomena; D018441:Biofilms; D015921:Dental Implants / Q000009:adverse effects / Q000382:microbiology; D017267:Dental Prosthesis Design; D018450:Disease Progression; D005891:Gingivitis / Q000382:microbiology; D006801:Humans; D010518:Periodontitis / Q000209:etiology* / Q000382:microbiology; D013499:Surface Properties
chemical_list: D015921:Dental Implants