Implant Disease Risk Assessment IDRA–a tool for preventing peri-implant disease

Lisa J.A. Heitz-Mayfield, Fritz Heitz, Niklaus P. Lang

Research output: Contribution to journalArticle

1 Citation (Scopus)


Objective: This treatment concept paper introduces a risk assessment tool, the Implant Disease Risk Assessment, (IDRA) which estimates the risk for a patient to develop peri-implantitis. Materials and methods: The functional risk assessment diagram was constructed incorporating eight parameters, each with documented evidence for an association with peri-implantitis. Results: The eight vectors of the diagram include (1) assessment of a history of periodontitis (2) percentage of sites with bleeding on probing (BOP) (3) number of teeth/implants with probing depths (PD) ≥5 mm (4) the ratio of periodontal bone loss (evaluated from a radiograph) divided by the patient's age (5) periodontitis susceptibility as described by the staging and grading categories from the 2017 World Workshop on the Classification of Periodontal and Peri-implant Diseases (Journal of Periodontology, 89 Suppl 1, S159-S172, 2018) (6) the frequency/compliance with supportive periodontal therapy (7) the distance in mm from the restorative margin of the implant-supported prosthesis to the marginal bone crest and (8) prosthesis-related factors including cleanability and fit of the implant-supported prosthesis. Conclusion: The combination of these factors in a risk assessment tool, IDRA, may be useful in identifying individuals at risk for development of peri-implantitis.

Original languageEnglish
Pages (from-to)397-403
Number of pages7
JournalClinical Oral Implants Research
Issue number4
Publication statusPublished - 1 Apr 2020

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