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ADC Practice Question — CMS Risk Assessment & Classification

colleague argues this child should be Low risk because…

Prevention and cariology questions test evidence-based decision-making — fluoride protocols, caries risk assessment, recall scheduling. This exam-level vignette tests your ability to work through clinical details and arrive at the correct management.

A 9-year-old has dmfs + DMFS = 0, no white spots, no radiolucencies, no PI = 3 sites. Both upper permanent first molars show yellow-brown opacities with post-eruptive enamel breakdown consistent with Molar Hypomineralization. A colleague argues this child should be Low risk because his sugar intake is minimal and he brushes well. Which CMS principle resolves this?

  • A. Protective factors should be weighted equally with clinical presentation at every visit
  • B. Low sugar intake overrides clinical signs when dmfs equals zero
  • C. Plaque quality modifies the risk category downward by one level
  • D. Risk is determined solely by clinical signs, not exposure to risk factors
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Sources cited
Therapeutic Guidelines v4 Odell's 3rd & 4th Ed IADT 2020 Code of Conduct CMS (Evans) Infection Control + more
Show the answer and cited explanation
Correct answer: D

CMS principle: risk 'determined solely on an analysis of the severity and extent of presenting clinical and radiographic signs and not from epidemiologic-type considerations.' Exposures are explored to identify causes but do not dictate the category. SOURCE — Evans RW, Dennison PJ. CMS for children, ADJ 2009;54:381-389, p.384

Source: Evans RW, Dennison PJ. CMS for children, ADJ 2009;54:381-389, p.384
Remy's study tip — Identify the patient’s risk level first, then match the intervention to the risk.

Exam preparation FAQ

How should I prepare for Preventive Dentistry & Cariology in the ADC exam?
Build competence across all topics. The exam tests application of guidelines to clinical scenarios, not memorisation.
How do I approach an unfamiliar CMS Risk Assessment & Classification vignette?
Extract key clinical data from the stem before reading options. There are usually 3–4 critical variables that determine the correct answer.

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