Question 521 · LDEK · Access and canal preparation
In which of the following cases, electronic apex locator may show the reading of “too short” in relation to actual measurement of canal length?
1) root canal obliteration;
2) tooth with wide apical foramen;
3) inflammatory lesions in periapical tissues;
4) root canal perforation.
The correct answer is:
2) tooth with wide apical foramen;
3) inflammatory lesions in periapical tissues;
4) root canal perforation.
The correct answer is:
- A. 1, 3.
- B. 2, 4.
- C. 3, 4.
- D. 1, 2.
- E. 2, 3.
Hint
A short reading means the electrical circuit closes with periodontal tissue before the file reaches the true apical foramen.
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