Question 43 · LDEK · Crowns
In order to obtain the marginal integration of the crown with tooth structure and periodontal tissue:
1) smooth crown - tooth structure interface should be obtained;
2) gingival area of the tooth should be prepared properly;
3) crown margin should be placed about 2.0 mm below the base of the gingival sulcus;
4) crown margin should be placed about 0.5-1.0 mm below the base of the gingival sulcus.
The correct answer is:
2) gingival area of the tooth should be prepared properly;
3) crown margin should be placed about 2.0 mm below the base of the gingival sulcus;
4) crown margin should be placed about 0.5-1.0 mm below the base of the gingival sulcus.
The correct answer is:
- A. 1,2,3.
- B. 1,2,4.
- C. 1,2.
- D. 1,3.
- E. 1,4.
Hint
Consider how deep a crown margin may go without invading the junctional epithelium and the biologic width.
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