A 50-year-old with periodontitis has a radiographic bone loss/age ratio of 0.5 and smokes 15 cigarettes per day. Using the 2017 AAP/EFP classification, what grade should be assigned?

  • Correct answer

    Grade C

  • Grade B

  • Grade A

  • No grade can be assigned without 5 years of longitudinal data

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

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Explanations

  • A ratio of 0.5 alone would indicate Grade B, but smoking 10 or more cigarettes per day is a grade modifier that shifts the case to Grade C. Indirect evidence such as the bone loss/age ratio is used when longitudinal data are unavailable.

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

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