Question 55 · LDEK · Adhesive systems
Indicate the true statements concerning the etching of dentin prior to the application of composite material:
1) etching fosters the removal of the smear layer from the lumen of dentinal tubules;
2) etching does not cause demineralization of perinatal dentin because this dentin is more mineralized than intraoperative dentin;
3) prolonged etching of dentine does not improve the quality of the hybrid layer;
4) the use of the VII generation self-etching system is not recommended with chemically cured composite material;
5) penetration of resin tags into exposed dentinal tubules is crucial for the adhesion of composite materials.
The correct answer is:
2) etching does not cause demineralization of perinatal dentin because this dentin is more mineralized than intraoperative dentin;
3) prolonged etching of dentine does not improve the quality of the hybrid layer;
4) the use of the VII generation self-etching system is not recommended with chemically cured composite material;
5) penetration of resin tags into exposed dentinal tubules is crucial for the adhesion of composite materials.
The correct answer is:
- A. 1,2,3.
- B. 2,3,4.
- C. 3,4,5.
- D. 1,3,4.
- E. 1,2,5.
Hint
Recall which dentin component dissolves fastest in acid, and whether resin tags or the hybrid layer provide most of the bond strength.
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