Question 206 (part 2) · LDEK · Post and core restorations
Leaving certain part of crown tissue during preparing a toot for post and core and crown, gives the ferrule effect. Explain this name:
1) the effect of clamp, which means merging the walls;
2) it changes/improves the proportions of root to the coronal part;
3) it ensures better retention for the post;
4) it decreases the stress of tooth tissues, increases the resistance to fracture;
5) it prevents the wash out of core cement;
6) it improves the seal of posts and cores.
Correct answer is:
2) it changes/improves the proportions of root to the coronal part;
3) it ensures better retention for the post;
4) it decreases the stress of tooth tissues, increases the resistance to fracture;
5) it prevents the wash out of core cement;
6) it improves the seal of posts and cores.
Correct answer is:
- A. all of the above-mentioned.
- B. 1,3,5.
- C. 2,4,6.
- D. 2,4,5.
- E. 3,5,6.
Hint
Picture a band of crown encircling sound dentine above the margin and list all of its mechanical and sealing benefits.
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