## **Core Concept**
The treatment of a displaced transverse fracture of the patella involves restoring the integrity of the extensor mechanism of the knee. The patella plays a crucial role in knee extension by increasing the leverage of the quadriceps tendon. Displaced fractures disrupt this mechanism, necessitating intervention to regain function.

## **Why the Correct Answer is Right**
The correct answer, , involves open reduction and internal fixation (ORIF) of the patella. This surgical approach is indicated for displaced patellar fractures (> 2 mm displacement) to restore the articular surface and the extensor mechanism of the knee. ORIF allows for accurate reduction and stable fixation, enabling early mobilization and minimizing the risk of complications such as nonunion, malunion, or quadriceps weakness.

## **Why Each Wrong Option is Incorrect**
* **Option A:** - This option is incorrect because a displaced transverse fracture of the patella cannot be effectively managed conservatively due to the disruption of the extensor mechanism, which would lead to significant functional impairment.
* **Option B:** - This option is incorrect as it does not specify a treatment approach. While partial patellectomy might be considered in certain cases of patellar fractures, it is not the standard treatment for a displaced transverse fracture where preserving the patella is feasible.
* **Option D:** - This option is incorrect because, although knee immobilization might be part of the postoperative care for a patellar fracture, it is not a standalone treatment for a displaced transverse fracture.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the goal of treating patellar fractures is not only to achieve bony healing but also to restore the function of the extensor mechanism of the knee. Early mobilization is crucial to prevent stiffness and promote optimal outcomes.

## **Correct Answer:** . Open reduction and internal fixation.