**Core Concept**
A severely comminuted fracture of the patella is a complex injury where the patella is broken into multiple fragments, making closed reduction and immobilization difficult or impossible. In such cases, the primary goal of treatment is to restore the extensor mechanism of the knee, ensuring proper tracking of the quadriceps tendon and minimizing the risk of complications like quadriceps weakness and patellar baja.

**Why the Correct Answer is Right**
In the case of an irreducible comminuted patellar fracture, the preferred treatment is arthroscopically-assisted or open reduction and internal fixation (ORIF) using plates and screws. This approach allows for precise reduction and stabilization of the fracture fragments, ensuring proper healing and minimizing the risk of complications. The arthroscopic assistance helps in visualizing the fracture fragments and the surrounding soft tissues, facilitating a more accurate reduction and fixation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because closed reduction and immobilization are not suitable for severely comminuted fractures, as they cannot be adequately reduced and immobilized.
**Option B:** This option is incorrect because arthroscopic debridement alone may not address the underlying fracture fragments and may lead to further complications.
**Option C:** This option is incorrect because arthroscopic-assisted ORIF is a more precise and effective method for managing irreducible comminuted patellar fractures.

**Clinical Pearl / High-Yield Fact**
In cases of irreducible comminuted patellar fractures, it's essential to consider the use of arthroscopically-assisted ORIF to restore the extensor mechanism of the knee and prevent long-term complications.

**Correct Answer:** C.