Prosthetic replacement of femoral head is indicated for one of the following sites of fractures-
**Core Concept**
Prosthetic replacement of the femoral head is a surgical technique used to treat complex fractures of the femur, particularly those involving the hip joint. This procedure aims to restore joint function and alleviate pain by replacing the damaged femoral head with an artificial one.
**Why the Correct Answer is Right**
The correct answer is **C. Subcapital fractures**. Subcapital fractures occur just below the femoral neck, near the top of the femur. These fractures often compromise the blood supply to the femoral head, leading to avascular necrosis and potential collapse of the joint. Prosthetic replacement is indicated in such cases to prevent further joint damage and restore mobility.
**Why Each Wrong Option is Incorrect**
**Option A:** Intertrochanteric fractures, which occur in the upper part of the femur, are typically managed with internal fixation or osteosynthesis, rather than prosthetic replacement.
**Option B:** Femoral neck fractures, while sometimes treated with prosthetic replacement, are not the most common indication for this procedure. Internal fixation or hemiarthroplasty may be more suitable options.
**Option D:** Distal femoral fractures, which occur in the lower part of the femur, are often managed with internal fixation or external fixation, depending on the severity of the fracture.
**Clinical Pearl / High-Yield Fact**
Prosthetic replacement of the femoral head is a high-yield topic for the exam, as it is a common treatment option for complex hip fractures. Remember that subcapital fractures are often the most challenging to manage and may require prosthetic replacement to prevent joint collapse.
**Correct Answer:** C. Subcapital fractures.