NEET MDS

The Power Course

Which of the following is used in retreatment of RCT:



Choices

1 ) Hydrogen peroxide
2 ) 2% Chlorhexidine
3 ) Calcium hydroxide
4 ) Sodium hypochlorite

Explanation


Endo irrigant for retreatment cases:

2% chlorhexidine is used as an irrigating solution in retreatment cases of failed RCT. Because, in retreatment cases, major organism to be targeted is E.faecalis. At low concentration (0.2%) of chlorhexidine, its antimicrobial efficacy is less. But at higher concentrations i.e., 2% chlorhexidine causes precipitation of cytoplasmic contents resulting in cell death which is best towards E.faecalis. Apart from this 2% chlorhexidine has a substantivity effect. Studies have shown that against E. faecalis sodium hypochlorite is less effective whereas calcium hydroxide is ineffective. 


Answer

2% Chlorhexidine

Last Modified : 02-Dec-2019

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