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Restorative & Materials · single question

Fourth-generation dental adhesives are also known as which type of bonding system?

  1. Three-step etch-and-rinse (etch, prime, bond) systems
  2. Two-step self-etch systems
  3. One-step (all-in-one) self-etch systems
  4. Two-step etch-and-rinse systems
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Correct answer: A. Three-step etch-and-rinse (etch, prime, bond) systems

Fourth-generation adhesives are the classic three-step total-etch (etch-and-rinse) systems: separate phosphoric-acid etch, primer, and bonding resin; they remain a gold-standard for bond strength.Other options: Two-step self-etch is fifth/sixth-generation; one-step all-in-one is seventh-generation; two-step etch-and-rinse is fifth generation.Key exam takeaway: 4th gen = 3-step etch-and-rinse (etch + primer + bond), the bonding gold standard.

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