Line illustration of a periodontal probe measuring a gum pocket

Study Set drill · Clinical domain

Name it. Stage it. Grade it.

The 2018 classification turned perio into a system: extent for how much of the mouth, stage for severity and complexity, grade for the rate and the risk. Read the case, set all three axes, and get the logic the moment you commit.

✓A whole diagnosis, not half of one. Extent, stage and grade together, written the way it goes in a chart: Generalized Stage III Grade B periodontitis.
✓The traps, on purpose. Light smoking that does not reach Grade C, controlled diabetes that does not either, one lost tooth that rules out two stages, and a Stage IV case that is only Grade B.
✓It teaches before it tests. Every area opens with a short brief, and a miss gives you the reason and a second look.
✓Feeds your dashboard. Your score rolls into your Clinical readiness.

Learn draws 12 items, Board 16 and Exam 20, sampled fresh from a pool of 53 and spread across every area, so no two runs are the same. What you do about the diagnosis lives in the Periodontal Therapy drill.

Perio classification

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This run

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10 items

Flawless — every case, both axes.

Staged and graded ten cases without a single miss on the first look. That is exam-ready.

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This drill is a study aid based on the 2017 World Workshop (AAP/EFP) classification of periodontal and peri-implant diseases. Staging and grading here uses the worst-affected site and simplified thresholds for teaching; real diagnosis integrates the full clinical and radiographic picture and clinical judgment. The House of Hygiene is not affiliated with or endorsed by the JCNDE.