INBDE (Integrated National Board Dental Examination) Practice Exam

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Ace your INBDE with our comprehensive practice exam. Featuring detailed explanations, interactive flashcards, and a wide array of multiple-choice questions designed to mirror the real test. Get ready to surpass your expectations!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What causes yellow brown stains on teeth?

P. intermedia
Chromogenic bacteria
S. mutans
Chlorhexidine and stannous fluoride

The correct answer is: Chlorhexidine and stannous fluoride

Yellow-brown stains on teeth are often caused by the use of chlorhexidine and stannous fluoride. Chlorhexidine mouthwash, commonly used for its antimicrobial properties in controlling plaque and gingivitis, can lead to extrinsic staining on teeth, especially when used for prolonged periods or not used as directed. Stannous fluoride, another common component in toothpaste known for its anti-cavity and anti-bacterial properties, can also contribute to staining if not used correctly. Therefore, the correct answer is D, Chlorhexidine and stannous fluoride. Options A, B, and C are incorrect because P. intermedia, chromogenic bacteria, and S. mutans are not typically associated with causing yellow-brown stains on teeth.