Question 374 · LDEK · Endodontic instruments
Which of the statements concerning Hedstroem files is true?
1) H-file is more prone to breaking than a K-file;
2) due to its structure, an H-file is very effective while rotating;
3) cross-sectional shape of an H-file is triangular;
4) H-file cuts dentin mainly the moment the file is inserted into the canal.
The correct answer is:
2) due to its structure, an H-file is very effective while rotating;
3) cross-sectional shape of an H-file is triangular;
4) H-file cuts dentin mainly the moment the file is inserted into the canal.
The correct answer is:
- A. only 1.
- B. only 2.
- C. 1,2.
- D. 2,3.
- E. 3,4.
Hint
Think about how an H-file is manufactured (machined from a round blank) and which way its blades face.
The answer, the explanation and a note on every option are available once you log in. The account is free: topic tests, a mock exam, mistake review and statistics.
More questions on Conservative dentistry
- What is the shape of endodontic access in central upper incisor in young people:
- The C-shaped root canal configuration is observed most commonly in:
- This method uses the arc-lamp producing blue light, analyzer and monitor. Computer analysis provides quantitative assessment of the mineral loss in…
- Indicate the true statements about EDTA and urea based lubricants used in endodontics:
- A patient comes to the dental office with painful tooth 44, in which a resin composite restoration was placed a week ago. The initial diagnosis is…
- Indicate the true statements on attrition: