Concentration of EDTA used during BMP:

# Concentration of EDTA used during biomechanical preparation (BMP) is:
A. 20% at pH 7.4
B. 15% at pH 5.0
C. 15% at pH 7.3
D. 25% at pH 7.4

The correct answer is C. 15% at pH 7.3

EDTA has a property of chelate formation with calcium salts. Disodium salt of EDTA is used in endodontic therapy for dissolving pulp stones.