The CPI probe dropping into a hard-based recess on tooth 36 confirms what clinical finding?
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 12-year-old has an existing sealant on tooth 46 with enamel breakdown along its margin judged to be caries-induced. On tooth 36, a suspect fissure shows a white area after air drying, and the WHO CPI probe ball-end drops into a hard-based recess. The CPI probe dropping into a hard-based recess on tooth 36 confirms what clinical finding?
- A. A Code 2 lesion requiring fluoride varnish application only
- B. Dentine exposure scored as ICDAS Code 5 requiring urgent restoration
- C. Enamel breakdown — confirming the lesion as ICDAS Code 3 or higher
- D. An inconclusive finding requiring bitewing radiograph for diagnosis
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Show the answer and cited explanation
WHO CPI probe: ball-end into HARD-based recess = enamel breakdown confirmed (Code 3+). Ball-end drops out of sight into SOFT-based cavity = into dentine (Code 5). Visible dentine base = Code 6. SOURCE — Evans RW, Dennison PJ. CMS for children, ADJ 2009;54:381-389, p.383
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