Question 25 (part 2) · LDEK · Bridges
Indicate true statements regarding fabrication of bridges on zirconium dioxide ceramics coping:
1) zirconium oxide ceramics is casted and veneered with fluorapatites ceramics;
2) bridge pontic connectors should be of minimum dimension of 6 mm2 in anterior section;
3) bridge pontic connectors should be of minimum dimension of 12 mm2 in posterior section;
4) abutment preparation should ensure minimum space of 0,4 mm in anterior section for coping;
5) preparation depth of functional cusps of abutment teeth should be of 1.5 mm.
Correct answer is:
2) bridge pontic connectors should be of minimum dimension of 6 mm2 in anterior section;
3) bridge pontic connectors should be of minimum dimension of 12 mm2 in posterior section;
4) abutment preparation should ensure minimum space of 0,4 mm in anterior section for coping;
5) preparation depth of functional cusps of abutment teeth should be of 1.5 mm.
Correct answer is:
- A. 1,3,5.
- B. 1,2,3.
- C. 3,4.
- D. 2,3,4.
- E. 1,2,4,5.
Hint
Zirconia frameworks are milled, and connectors and tooth reduction must be generous because the framework is veneered.
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