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  • 1. J Clin Periodontol 2009;36:357-63 Extent of peri-implantitis-associated bone loss Fransson C et al Göteborg, Sweden Material : 1070 implants from 182 subjects examined from 1 – 23 years follow-up Definition : Peri-implantitis = bleeding on probing, pus & probing pocket depth ≥ 6mm Results : About 40 % of implants in each subject were affected by peri- implantitis-associated bone loss
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  • 3. Long-term (> 5 years) appearance of single- tooth implant crowns • gingival blue-coloring • progressive infraocclusion • ” root” exposure World J Orthod nr. 3, 2006
  • 4. Godtfredsen 2008 Long-term follow-up (5 yrs) of implants Score 1: No blue-coloring ........ 43% Scores 2-4: Blue-coloring or visible margin ........ 57 % of treated cases at follow-up after 5 years
  • 5. Why labial bone loss & discoloration of gingiva in front of implants • Alveolar bone in front is built from endosteally formed bon e (except from narrow strip at crest where periosteal bone is formed due to the continuous tooth eruption) • Endosteal bone is more porous than periosteal bone (= more sensitive to resorption) • The labial bone in front of implants does not hold (disturbed vascularization, changes of mechanical stimuli, etc.)
  • 6. Rotational Palatal Pedicle Graft Stig K. Osterberg DDS MSD Port Townsend WA
  • 7. Eur J Orthod 2001;237:15-31 Orthodontic aspects of the use of oral implants in adolescents: a 10-year follow-up study Thilander B, Ödman J, Lekholm U Göteborg, Sweden
  • 8. J Clin Periodontol 2004;31:1024-8 Long-term vertical changes of the anterior maxillary teeth adjacent to single implants in young and mature adults A retrospective study Bernard JP, Schatz JP, Christou P, Belser U, Kiliaridis S Geneva, Switzerland C Infra-occlusion
  • 9.
  • 10. Clin Impl Dent & Related Research 2005;7:200-208