Question 21 (part 2) · LDEK · Irrigation and intracanal medicaments
Ozone in endodontics is used as gas or ozonated water. Choose correct statements concerning the use of ozone for root canals disinfection:
1) ozonated water is recommended during root canal preparation, preferably simultaneously with sodium hypochlorite rinsing;
2) ozonated water used during root canal preparation excludes simultaneous rinsing with sodium hypochlorite;
3) ozonated water is used after complete chemo mechanical preparation, during final rinsing with additional ultrasound activation;
4) ozone in gas state is used directly before the canal obturation, when the root canal is already dry;
5) before obturation, in order to dry the canal, ozone is used in gas state.
Correct answer is:
2) ozonated water used during root canal preparation excludes simultaneous rinsing with sodium hypochlorite;
3) ozonated water is used after complete chemo mechanical preparation, during final rinsing with additional ultrasound activation;
4) ozone in gas state is used directly before the canal obturation, when the root canal is already dry;
5) before obturation, in order to dry the canal, ozone is used in gas state.
Correct answer is:
- A. 1,5.
- B. 1,3,4.
- C. 3,5.
- D. 2,3,4.
- E. 2,4.
Hint
Ozone is an adjunct to, not a substitute for, standard irrigation; also consider how a canal is actually dried.
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