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New peri-implantitis classification: “Bone loss thresholds are not relevant for daily practice”

What is peri-implantitis? How frequent is it? The 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions aimed at establishing a new internationally accepted classification. Jan Derks, Gothenburg, gave us an update on the results.
July 16, 2018

Jan, according to current evidence, how many implant patients and how many implants develop peri-implantitis?
Dr. Jan Derks: 
The numbers depend on the definition of peri-implantitis: With very tough case definitions, we see peri-implantitis in about 40-50 percent of implant patients...

Oh, wow…
Dr. Jan Derks: 
Yes, but this high prevalence results from a very low bone loss threshold of 0.5 mm which may be difficult to detect on a radiograph. Moderate to severe peri-implantitis with bone loss of more than 2 mm occurs in roughly 15 percent of patients and 8 percent of implants.1 These values have been confirmed in several cohorts from different countries.

The problem in peri-implantitis epidemiology is that there is no common classification – which is why different studies come to different numbers. The World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions, organized by the European Federation of Periodontology (EFP) and the American Academy of Periodontology (AAP), was a first step to solve this problem. How difficult is it to reach a commonly accepted consensus for this topic?

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