A 45-year-old non-smoker without diabetes has interdental clinical attachment loss of 5 mm at the worst site, radiographic bone loss extending to the middle third of the root, a maximum probing depth of 6 mm and no teeth lost to periodontitis. Using the 2017 AAP/EFP classification, what is the stage?

  • Correct answer

    Stage III

  • Stage II

  • Stage IV

  • Stage I

This question is one of 15 in AFK practice: Periodontics. Test yourself on all of them.

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Explanations

  • Interdental CAL of 5 mm or more with bone loss to the middle third and no more than 4 teeth lost to periodontitis defines Stage III. Stage IV additionally requires loss of 5 or more teeth or complexity needing complex rehabilitation.

    Source: Tonetti, Greenwell and Kornman, Staging and grading of periodontitis (J Periodontol 2018) link — oneguy

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