Question 149 (part 2) · LDEK · Prosthodontic materials
Preparing the surface of silicone restorations for adhesive cementing consists in:
1) degreasing the surface with alcohol;
2) etching its internal surface with 9.5% hydrofluoric acid (1 to 5 min);
3) rinsing the surface in alcohol solution or distilled water and drying;
4) silane application;
5) bond and composite cement application.
Correct answer is:
2) etching its internal surface with 9.5% hydrofluoric acid (1 to 5 min);
3) rinsing the surface in alcohol solution or distilled water and drying;
4) silane application;
5) bond and composite cement application.
Correct answer is:
- A. 1,3,4,5.
- B. 1,2,4,6.
- C. 2,3,5.6.
- D. all of the above-mentioned.
- E. 1,4,5,6.
Hint
Glass-containing ceramics bond through micromechanical retention plus a chemical coupling agent; check whether any listed step is unnecessary.
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