The most effective means of reducing microbes in root canal:
**Core Concept**
The most effective means of reducing microbes in root canal therapy involves the use of a disinfectant that can penetrate the dentinal tubules and reach the infected area. This is crucial in eliminating bacterial infection and preventing reinfection.
**Why the Correct Answer is Right**
The correct answer is sodium hypochlorite (NaOCl), which is a strong disinfectant that can effectively dissolve and eliminate bacteria, viruses, and fungi in root canal infections. It works by releasing hypochlorous acid, which penetrates the dentinal tubules and inactivates microbial enzymes, ultimately leading to the death of the microorganisms. The high pH and oxidative properties of NaOCl also help to dissolve organic matter and reduce bacterial load.
**Why Each Wrong Option is Incorrect**
* **Option A:** Hydrogen peroxide is not effective in reducing microbes in root canal therapy due to its low pH and limited penetration into dentinal tubules.
* **Option B:** Chlorhexidine is an antimicrobial agent, but it is not as effective as sodium hypochlorite in eliminating bacteria in root canal infections.
* **Option D:** EDTA (ethylenediaminetetraacetic acid) is used to remove smear layer and open dentinal tubules but not as a disinfectant.
**Clinical Pearl / High-Yield Fact**
Sodium hypochlorite is a potent disinfectant that can dissolve organic matter and inactivate microbial enzymes, making it the most effective agent for reducing microbes in root canal therapy.
**Correct Answer:** C. Sodium hypochlorite.