## **Core Concept**
The management of a tooth fracture, especially in pediatric patients, involves preserving the tooth's vitality and ensuring proper healing of the pulp and surrounding tissues. In cases of a tooth with an open apex and large pulpal exposure, the goal is to promote root development and prevent infection.

## **Why the Correct Answer is Right**
The correct approach for a tooth with a large pulpal exposure, particularly in an immature tooth with an open apex like a 7½-year-old child's central incisor, is **partial pulpotomy** or **crown fracture with pulpal exposure**. This procedure involves removing the coronal portion of the pulp to preserve the vitality of the remaining pulpal tissue, which is essential for further root development. This method is favored because it allows for the continued growth and closure of the root apex, reducing the risk of root resorption and promoting a healthy environment for the tooth.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is not provided, but typically, incorrect options might include treatments not suitable for an immature tooth with a large pulpal exposure, such as immediate root canal therapy without consideration for apex closure.
- **Option B:** Similarly, this option is not detailed but might involve treatments that do not prioritize preserving pulpal vitality and root development.
- **Option C:** This could potentially include a treatment that is too invasive or not indicated for a tooth with the potential for further development, such as extraction.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that in pediatric dentistry, preserving the vitality of the pulp in immature teeth is crucial for continued root development. Partial pulpotomy is a recommended treatment for immature teeth with pulpal exposure due to trauma, as it supports the tooth's ability to complete root formation.

## **Correct Answer:** . Partial pulpotomy.