For the identical C3 on permanent tooth 36, how does management differ?
Prevention and cariology questions test evidence-based decision-making — fluoride protocols, caries risk assessment, recall scheduling. This high-difficulty vignette tests your ability to work through clinical details and arrive at the correct management.
A 10-year-old has primary molar 75 with C3 distal radiolucency and 40% root remaining (no marginal ridge shadow). Permanent molar 36 has an identical C3 mesial radiolucency. For the identical C3 on permanent tooth 36, how does management differ?
- A. No difference — C3 management is identical for primary and permanent teeth
- B. Permanent 36 also triggers further consideration with the same sequential exfoliation and separation checks
- C. Permanent 36 is managed with topical fluoride and monitoring — no further consideration at C3
- D. Permanent 36 at C3 requires immediate UCSR because permanent teeth cannot be lost
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Show the answer and cited explanation
Critical crossover: Primary C3 = 'do not restore without further consideration' (exfoliation, shadow, separation checks). Permanent C3 = simply 'do not restore — topical fluoride and monitor.' The lower primary threshold reflects thinner deciduous enamel and faster dentine progression. SOURCE — Evans RW, Dennison PJ. CMS for children, ADJ 2009;54:381-389, Tables 5 & 6
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