Caries Risk and Sealant Decision in Mixed Dentition
A 7-year-old girl presents for routine care. She has no current pain. Exam shows: two small non-cavitated white-spot lesions on the buccal surfaces of the primary maxillary incisors, one cavitated lesion on the occlusal surface of the primary mandibular left second molar, and newly erupted permanent first molars with deep fissures that are caries-free but plaque-retentive. She drinks juice daily, brushes once daily without parental help, and has no fluoride exposure other than toothpaste. She has no medical conditions and takes no medications. Radiographs show no proximal caries.
1. How would you stratify her caries risk, and what specific preventive and restorative plan follows?
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She is at elevated caries risk. Supporting factors: existing cavitated caries, non-cavitated white-spot lesions, frequent juice, once-daily brushing without supervision, and limited fluoride exposure. Protective factors are limited. The presence of any cavitated lesion plus active white-spot lesions is enough to place her above low risk.
Plan:
- Restore the cavitated primary molar lesion (source control).
- For the non-cavitated white spots, use remineralization strategies: fluoride varnish, counseling on reducing juice frequency, and improved oral hygiene with parental supervision.
- Seal the caries-free permanent first molars, since deep plaque-retentive fissures in a high-risk child benefit from sealants even without current caries.
- Consider fluoride varnish at recall intervals appropriate for elevated risk.
- Address diet and hygiene behaviors with specific, achievable goals rather than general advice.
2. The parent asks why sealants are recommended when the permanent molars 'aren't decayed yet.' Explain the rationale and the conditions under which you would not seal.
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Sealants are preventive, not restorative. In a child with elevated caries risk and deep, plaque-retentive fissures, sealing the pits and fissures removes the environment where caries starts. The permanent first molars are the teeth most likely to develop fissure caries, so protecting them at eruption is high-value.
You would not seal if: the tooth is already cavitated (then restore), if isolation cannot be achieved and moisture control is inadequate (sealant retention would fail), or if the fissure is shallow and clearly self-cleansing in a low-risk child. In this patient, none of those exceptions apply, so sealing is appropriate. The parent should understand that sealants reduce but do not eliminate risk, so diet, fluoride, and hygiene changes remain necessary.