Periodontics · single question
A patient develops brown extrinsic tooth staining over two weeks; a mouthrinse used daily is found to be chlorhexidine. The cause of the staining is:
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Correct answer: A. Chlorhexidine
- A. Correct. Chlorhexidine gluconate causes characteristic brown extrinsic staining of teeth, restorations, and the tongue, plus altered taste, with prolonged use.
- B. Sodium fluoride rinses do not cause brown staining.
- C. Hydrogen peroxide bleaches rather than stains.
- D. This is not the cause of the staining described.