Question 207 (part 2) · LDEK · Crowns
In order to achieve sufficient space on occlusal surface for material of metallic crown, it is accepted to lower the cusps:
1) 1.5 mm upper palatal;
2) 1.0 mm upper palatal;
3) 1.5 mm lower buccal;
4) 1.0 mm lower buccal;
5) 2.0 mm all;
6) 1.0 mm lower lingual and upper buccal.
Correct answer is:
2) 1.0 mm upper palatal;
3) 1.5 mm lower buccal;
4) 1.0 mm lower buccal;
5) 2.0 mm all;
6) 1.0 mm lower lingual and upper buccal.
Correct answer is:
- A. 1,3,6.
- B. 2,4,6.
- C. only 5.
- D. 1,4,6.
- E. 2,3,6.
Hint
Distinguish supporting (functional) cusps from non-supporting ones; the former need more reduction to give the metal enough thickness.
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