Question 139 · LDEK · Adhesive systems
Which phenomena are observed in overdried dentin after etching?
1) collapse of collagen fibers;
2) emulsification;
3) increased impregnation of collagen fibers with a hydrophilic primer;
4) limitation of monomer penetration into the channels formed after the dissolution of hydroxyapatite crystals;
5) decrease in adhesion force.
The correct answer is:
2) emulsification;
3) increased impregnation of collagen fibers with a hydrophilic primer;
4) limitation of monomer penetration into the channels formed after the dissolution of hydroxyapatite crystals;
5) decrease in adhesion force.
The correct answer is:
- A. 1,2,3.
- B. 2,3,4.
- C. 1,4,5.
- D. 3,4,5.
- E. 1,2,5.
Hint
Think about what keeps the demineralised collagen network expanded after etching and what happens when it is removed.
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