Restorative & Materials · patient case question
Each of the following is an appropriate treatment option for the adult's tetracycline staining EXCEPT one. Which is the EXCEPTION?
Patient case: Two patients with discoloured teeth
Patient: Adult female, 33 years old — and a separate paediatric patient, male, 9 years old
Chief Complaint: Adult: “My teeth have grey bands across them and I hate smiling.” Child: mother noticed a white patch on an upper canine.
Background: The adult was treated with a tetracycline antibiotic for a prolonged period in early childhood. The child has good hygiene, drinks fluoridated water, and the mark has been present since the tooth erupted.
Findings: Adult: generalised horizontal grey-brown banding of the full dentition, enamel intact and smooth. Child: a well-demarcated opaque white area on the buccal surface of a canine in the MIDDLE third, smooth on probing, no cavitation, away from the gingival margin.
Show answer and explanation
Correct answer: A. Systemic fluoride supplementation
- A. CORRECT as the exception. Systemic fluoride does nothing for tetracycline staining. The discolouration is INTRINSIC — tetracycline chelated with calcium and was incorporated into the dentine during tooth formation. Fluoride affects mineralisation and caries risk, not existing intrinsic colour, and excess systemic fluoride causes its own discolouration in the form of fluorosis.
- B. Direct composite veneers are a conservative masking option, particularly useful when the patient wants a reversible or lower-cost approach.
- C. Porcelain veneers are the definitive treatment for moderate to severe banding, though the darkest cases may need opaquing or full-coverage crowns to block the underlying colour.
- D. Extended external bleaching is a legitimate first-line option for tetracycline staining, though it needs far longer than for extrinsic stain — often three to six months of nightly tray use — and results are best for the milder first-degree cases.
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