Overview
Periodontitis is the body's destructive inflammatory response to the microbial biofilm on the tooth root. The same susceptibility does not disappear when a tooth is replaced by an implant — peri-implantitis is, in many ways, periodontitis around a titanium post. Patients with a history of treated periodontitis have a peri-implantitis risk several times higher than periodontally healthy patients in long-term cohort studies[1][2].
Why the susceptibility carries over
The host immune-inflammatory phenotype that produced periodontitis — exaggerated cytokine response to a relatively modest plaque load — is the same phenotype that drives peri-implantitis. Add to this the fact that peri-implant tissues have less collagen, no periodontal ligament, and a weaker biological seal than tooth-supported tissues, and the implant is in many ways more vulnerable to plaque than the tooth it replaced[1].
What the data shows
Long-term cohort data report peri-implantitis prevalence around 10–20% of implants in periodontally healthy patients and up to 30–50% in patients with a history of severe periodontitis, depending on the case definition used[2]. The 2023 EFP S3 clinical practice guideline lists prior periodontitis as one of the strongest patient-level predictors of peri-implantitis and structures supportive peri-implant care accordingly[3].
A periodontitis-aware implant pathway
- Active periodontitis must be controlled before implant placement — not at the same visit.
- Full-mouth probing, bleeding score, and radiographs documented as a baseline.
- Smoking cessation framed as part of the disease treatment.
- 3-month supportive peri-implant maintenance for life, not the standard 6.
- Single implants rather than splinted bridges where feasible — easier hygiene access.
- Lower threshold to investigate any bleeding on probing around an implant.
Frequently asked questions
Scientific references
- 1. Berglundh T, Armitage G, Araujo MG, et al. (2018). Peri-implant diseases and conditions: Consensus report of workgroup 4 of the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions. J Clin Periodontol. 45 Suppl 20:S286-S291. View source
- 2. Derks J, Tomasi C. (2015). Peri-implant health and disease. A systematic review of current epidemiology. J Clin Periodontol. 42 Suppl 16:S158-71. View source
- 3. Herrera D, Berglundh T, Schwarz F, et al. (EFP Workshop). (2023). Prevention and treatment of peri-implant diseases — The EFP S3 level clinical practice guideline. J Clin Periodontol. 50 Suppl 26:4-76. View source
- 4. National Institute of Dental and Craniofacial Research (NIH). (n.d.). Periodontal (Gum) Disease. NIDCR. View source