Question 4 (part 2) · LDEK · Bridges
Methods of mechanic surface unfolding combining metal to veneering material in adhesive bridges with metal coping do not include:
- A. macroretention in the form of pearls.
- B. microretention in the form of wire mesh.
- C. positive-negative method for washing out the salt crystals.
- D. abrasive blasting with sandblaster and aluminium oxide of 50 μm diameter.
- E. tin-coating.
Hint
Separate methods that physically enlarge the metal surface from techniques that create a chemically active oxide layer for bonding resin.
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