Active Root Caries, Dry Mouth, and a Wedding-Deadline Whitening Request
Mrs. L, 71, requests whitening before her daughter's wedding in three weeks. Her medical history includes hypertension, depression, and urge incontinence; medications are amlodipine 10 mg, sertraline 100 mg, oxybutynin 15 mg extended release, and omeprazole 20 mg. She drinks two cups of sweetened tea daily and sips cola all afternoon. Examination shows generalized 2 mm recession with exposed cementum, six new cervical carious lesions that are leathery and active, two existing composites with marginal staining and ditching, and a plaque score of 55%. Stimulated salivary flow is 0.4 mL/min and resting salivary pH is 5.9. She has no pain and is adamant about bleaching because the photographs will last forever. She declines fluoride varnish today, saying it makes her feel sick, and does not want to discuss her medications.
1. How do you sequence this patient's care, and what is the reasoning behind that order?
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The controlling problem is active caries in a dry mouth, not color. Sequence disease control first and esthetics last.
- Caries risk assessment and medical coordination. Four medications with xerogenic potential plus a stimulated flow of 0.4 mL/min (hyposalivation is generally below 0.7 mL/min stimulated) explain the leathery cervical lesions and low resting pH.
- Non-restorative caries control now: high-fluoride toothpaste, dietary frequency change, xylitol, saliva substitutes, and a 3-month recall.
- Restoration of active cavitated lesions, using glass ionomer where moisture control or cost is a concern.
- Reassessment at 3 months to confirm lesions are arrested and hygiene is stable.
- Bleaching only after caries is controlled and restorations are final.
Reasoning: bleaching an active carious cervix risks sensitivity, pulp irritation, and masking rather than treating disease; existing composites will not lighten, so whitening before replacement creates a permanent shade mismatch. A three-week deadline cannot compress caries control, and the wedding is not a clinical indication. Offer a realistic timeline: disease control over the next month, whitening in several months, and a cleaner, healthier smile for the event through prophylaxis and stain removal rather than bleach.
2. What preventive and non-restorative regimen do you recommend, and how do you address the medication issue without overstepping?
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Home regimen: 5,000 ppm sodium fluoride toothpaste twice daily, spit and do not rinse; reduce cola to mealtimes and substitute water; xylitol gum or lozenges totaling roughly 6–10 g per day; a saliva substitute or moisturizing gel, especially at night; and sips of water rather than soda through the afternoon.
In-office: fluoride varnish 22,600 ppm four times yearly for high risk, or 38% silver diamine fluoride on active root and cervical lesions after explicit consent about black staining. She declined varnish today; document that refusal, explain the alternatives and the caries risk in neutral language, and re-offer at the next visit rather than pressuring her.
Medication conversation: do not tell her to stop anything. Explain that oxybutynin, sertraline, and omeprazole can reduce saliva and that her physician may have alternatives; offer to send a letter describing the measured hyposalivation and asking whether the anticholinergic burden can be reduced. If she refuses, record that and continue dry-mouth management, which is effective regardless of cause. Also screen for candidiasis, which is common with hyposalivation, and set recall at 3 months because of the active lesions.
3. How do you handle the whitening request and the fluoride refusal, including consent and documentation?
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Separate the two refusals. The fluoride refusal is her autonomous choice: document it in her words, describe what was offered (varnish, high-fluoride toothpaste, silver diamine fluoride), note that risks and alternatives were explained, and continue to offer at each recall. Declining varnish does not justify withdrawing care or lecturing; it changes the plan to the alternatives she accepts.
The whitening request is a treatment you should decline for now, not a preference to accommodate. Explain that whitening does not arrest caries, may worsen sensitivity on receded cementum, and will not match her existing composites. Offer a concrete alternative: complete caries control and restorations, then reassess for bleaching, with the timeline stated honestly. If she insists on immediate bleaching, the appropriate response is to defer until the dentist has treatment-planned the caries, and to document the clinical rationale, not to proceed because she is paying.
Obtain written informed consent for any treatment actually performed, including the risks, benefits, and alternatives discussed. Record who was present, what was declined, and the plan for recall. Keep the note factual and timed; a contemporaneous record protects both the patient and the clinician if the caries progresses or she later disputes the advice given.