Question 381 · LDEK · Irrigation and intracanal medicaments
Para-chloroaniline (PCA) may be formed during canal irrigation as a result of the interaction between:
- A. sodium hypochlorite and chlorhexidine.
- B. chlorhexidine and EDTA.
- C. sodium hypochlorite and EDTA.
- D. sodium hypochlorite and hydrogen peroxide.
- E. sodium hypochlorite and citric acid.
Hint
The precipitate is a chlorinated aromatic amine — which irrigant has p-chlorophenyl groups in its molecule?
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