Irrigation

A potential weakness of CHX in the root canal may be its susceptibility to the presence of organic matter.

• A potential weakness of CHX in the root canal may be its susceptibility to the presence of organic matter.
• (Russell AD & Day MJ 1993)
• In an in vitro study, the effect of CHX is showed to be reduced, although not prevented, by the presence of dentine. Haapasalo et al. (2000)
• CHX was strongly inhibited by dentine matrix (the organic component of dentine).
• Portenier et al. (2002)

• CHX

H2O2

H2O2

• It is a clear, colorless liquid.
• Used in a variety of concentrations, 1% - 30%.
• H2O2 is active against viruses, bacteria, and yeasts.
• It produces hydroxyl free radicals (•OH), which attack several cell components such as proteins and DNA.
• In endodontics, H2O2 has long been used because of its antimicrobial and cleansing properties.
• It has been particularly popular in cleaning the pulp chamber from blood and tissue remnants, but it has also been used in canal irrigation.