Question 346 · LDEK · Root canal obturation
Which of the following statements concerning gutta-percha are false?
1) gutta-percha adheres to root canal walls;
2) gutta-percha shrinks as it cools down;
3) gutta-percha constitutes approximately 20% of a gutta-percha cone;
4) standardization of gutta-percha points is very precise - all points of a certain colour are the same in size;
5) gutta-percha dissolves after organic solvents (e.g. chloroform) are applied to it.
The correct answer is:
2) gutta-percha shrinks as it cools down;
3) gutta-percha constitutes approximately 20% of a gutta-percha cone;
4) standardization of gutta-percha points is very precise - all points of a certain colour are the same in size;
5) gutta-percha dissolves after organic solvents (e.g. chloroform) are applied to it.
The correct answer is:
- A. 1,5.
- B. 2,5.
- C. 2,3.
- D. 1,4.
- E. 3,4.
Hint
Think about whether gutta-percha bonds to dentin, and how accurate the ISO sizing of gutta-percha cones really is.
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