Question 168 · LDEK · Post and core restorations
The root canal prepared for an individual post and core should address the following demands:
1) has a circular cross-sectional shape;
2) has an oval cross-sectional shape;
3) has the proper finish line prepared on lateral walls;
4) the length of the root part should at least equal the height of prosthetic crown;
5) the length of the root part should equal 1/3 of the length of prosthetic crown.
The correct answer is:
2) has an oval cross-sectional shape;
3) has the proper finish line prepared on lateral walls;
4) the length of the root part should at least equal the height of prosthetic crown;
5) the length of the root part should equal 1/3 of the length of prosthetic crown.
The correct answer is:
- A. 1,3,4.
- B. 1,3,5.
- C. 2,3,4.
- D. 2,3,5.
- E. 2,5.
Hint
A custom cast post copies the canal; think about resistance to rotation and the minimum post length relative to the crown.
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