Question 209 (part 2) · LDEK · Prosthodontic materials
Clinical problem of complex metallic-ceramic crowns is achieving permanent link between ceramics and metal alloy. Quality of this connection is dependent on:
1) presence of micro retentive depressions on metal;
2) presence of macro retentive depressions on metal;
3) presence of oxide layer after the oxidation process of metal coping;
4) thickness of metal veneering layer;
5) difference of contractility between materials layer (metal/ceramics).
Correct answer is:
2) presence of macro retentive depressions on metal;
3) presence of oxide layer after the oxidation process of metal coping;
4) thickness of metal veneering layer;
5) difference of contractility between materials layer (metal/ceramics).
Correct answer is:
- A. all of the above-mentioned.
- B. 1,3,4,5.
- C. 1,3,4.
- D. 1,3,5.
- E. 2,3,5.
Hint
Consider the mechanical, chemical and compressive components of the metal-porcelain bond, and which retention form is meant for resin veneers.
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