Irrigation

RC-Prep

RC-Prep

• RC-Prep is composed of EDTA and urea peroxide in a base of Carbowax.
• It is not water soluble.
• NaOCl & RC-Prep
• Interaction of the urea peroxide in RC-Prep with sodium hypochlorite, producing a bubbling action thought to loosen and help float out dentinal debris.

RC-Prep

• A residue of RC-Prep remains in the canals in spite of further irrigation and cleansing.
• RC-Prep allowed maximum leakage into filled canals over 2.6 times the leakage of the controls.

• Zubriggen et al.(1975)

• Cooke et al. (1976)

Ultrasonic Irrigation

Ultrasonic Irrigation

• The flushing action of the irrigant solution may be more important than the ability of the irrigant solution to dissolve tissue.
• (Baker et al. 1975)
• Most of the dentine debris is inorganic matter that cannot be dissolved by NaOCl. Therefore, removal of dentine debris relies mostly on the flushing action of irrigant.