Restorative & Materials · single question
A patient who chews betel nut has extrinsic staining, but tooth #8 has separate internal discoloration unrelated to the betel nut habit. After completing root canal therapy on #8, what is the MOST CONSERVATIVE option to improve its esthetics?
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Correct answer: A. Internal ('walking') bleach technique
Since the discoloration is intrinsic and the tooth has already been endodontically treated (providing safe access to the pulp chamber), internal (walking) bleaching is the most conservative option — it directly addresses intrinsic staining without removing additional tooth structure, unlike a veneer or crown.
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