Question 115 (part 2) · LDEK · Irrigation and intracanal medicaments
Choose true statements regarding rinsing the canals with NaOCl during endodontic treatment:
1) total volume of NaOCl used during preparing one canal should be at least 1 to 2 ml;
2) contact time of 2% solution against canal root walls should be at least 30 minutes;
3) too long rinsing of canal with NaOCl leads to weakening of canal walls and increases the risk of complications during mechanical preparation;
4) in infected canals, one should always use preparations of high concentration;
5) it is advised to rinse the canal with preparation of low concentration after using chelators.
Correct answer is:
2) contact time of 2% solution against canal root walls should be at least 30 minutes;
3) too long rinsing of canal with NaOCl leads to weakening of canal walls and increases the risk of complications during mechanical preparation;
4) in infected canals, one should always use preparations of high concentration;
5) it is advised to rinse the canal with preparation of low concentration after using chelators.
Correct answer is:
- A. 1,2,3.
- B. 2,4,5.
- C. 2,5.
- D. 1,3.
- E. 1,4.
Hint
Distinguish the volume of a single flush from the total per canal, and recall how demineralised dentin reacts to NaOCl after chelation.
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