INBDE (Integrated National Board Dental Examination) Practice Exam

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How does Bis-GMA function in dental adhesives?

  1. By removing smear layer

  2. By wettability of dentin

  3. Chemically bonds to resin through MMA bonds

  4. Increases composite viscosity

The correct answer is: Chemically bonds to resin through MMA bonds

Bis-GMA functions in dental adhesives by chemically bonding to resin through MMA bonds. This is an important mechanism that ensures the stability and strength of the adhesive. Option A is incorrect because the removal of smear layer is not the primary role of Bis-GMA in dental adhesives. Option B is incorrect because while Bis-GMA may contribute to the wettability of dentin, it is not its main function. Similarly, option D is incorrect because although Bis-GMA can increase composite viscosity, it is not the main purpose of its use in dental adhesives. Therefore, option C is the most accurate and best explains how Bis-GMA functions in dental adhesives.

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