## **Core Concept**
Sodium hypochlorite is a chemical compound commonly used as a disinfectant and a bleaching agent. In dentistry, it is often utilized for root canal irrigation and as a component in some dental solutions for its antimicrobial properties. The concentration of sodium hypochlorite can significantly affect its efficacy and safety for dental use.

## **Why the Correct Answer is Right**
The correct answer, , refers to a specific concentration of sodium hypochlorite that is commonly used in Caridex, a product used for chemomechanical removal of carious dentine. This concentration is effective for dissolving organic matter and killing bacteria without causing harm to the surrounding healthy tissue. The use of sodium hypochlorite in such a controlled concentration is crucial for its effectiveness and safety.

## **Why Each Wrong Option is Incorrect**
- **Option A:** is too high for safe use in dental procedures like chemomechanical caries removal, as higher concentrations can be harmful to the dental pulp and surrounding tissues.
- **Option B:** might not be as effective as for the chemomechanical removal of carious dentine, potentially leading to incomplete removal of carious material.
- **Option D:** seems to be incorrectly or incompletely stated, and if it implies a much lower or different concentration, it would likely not be effective for the intended use in Caridex.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the effectiveness and safety of sodium hypochlorite in dental applications heavily depend on its concentration. For chemomechanical caries removal, a concentration of is often cited for its balance of efficacy and safety.

## **Correct Answer:** .