A healthy 16-year-old non-smoker has interdental attachment loss of 6 mm and about 40% radiographic bone loss limited to the first molars and incisors, despite little plaque. What is the most appropriate diagnosis using the 2017 AAP/EFP classification?

  • Correct answer

    Periodontitis, Stage III, Grade C, molar/incisor pattern

  • Localized aggressive periodontitis

  • Periodontitis, Stage II, Grade B, localized

  • Necrotizing periodontitis

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

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Explanations

  • CAL of 5 mm or more with bone loss into the middle third indicates Stage III, a bone loss/age ratio of about 2.5 indicates Grade C, and the distribution is described as a molar/incisor pattern. Localized aggressive periodontitis is the pre-2017 term and is no longer used.

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

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