Question 145 · LDEK · Prosthodontic materials
The intaglio of full-ceramic fixed partial dentures, made of feldspathic ceramic, should be prepared by:
- A. etching with 9% hydrofluoric acid and silanization.
- B. sandblasting with 50 µm Al₂O₃ particles.
- C. sandblasting with 110 µm Al₂O₃ particles and silanization.
- D. sandblasting with CoJet and silanization.
- E. etching with 9% hydrofluoric acid.
Hint
Feldspathic porcelain is glass-rich; which treatment exploits the glass phase both micromechanically and chemically?
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