## **Core Concept**
Clinpro 5000 toothpaste is a high-fluoride toothpaste used for the prevention and treatment of dental caries. It acts as a remineralizing agent, helping to strengthen tooth enamel and prevent tooth decay. The active ingredient in Clinpro 5000 is fluoride, which is essential for its cariostatic effect.

## **Why the Correct Answer is Right**
The correct answer, **C. 0.5%**, indicates that Clinpro 5000 toothpaste contains 0.5% fluoride by weight/volume (w/v), which is equivalent to 5000 parts per million (ppm) or 5 grams of fluoride per 1000 grams of toothpaste. This high concentration of fluoride is what makes Clinpro 5000 effective for remineralization and protection against dental caries.

## **Why Each Wrong Option is Incorrect**
- **Option A:** 0.05% - This concentration is much lower than what is found in Clinpro 5000 and is typically used in standard fluoride toothpastes for everyday use.
- **Option B:** 0.1% - Although higher than standard toothpastes, this is still lower than the fluoride concentration in Clinpro 5000.
- **Option D:** 1.0% - This is higher than the concentration in Clinpro 5000 and not the correct formulation for this specific product.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that Clinpro 5000 toothpaste is specifically indicated for patients at high risk of dental caries. Its use should be monitored by a dental professional due to the potential for dental fluorosis with excessive fluoride intake.

## **Correct Answer:** C. 0.5%