The operative procedure is known as “microfracture” is done for the –
The core concept here is the treatment of articular cartilage defects. Microfracture is a common procedure for focal cartilage damage, especially in the knee, where the goal is to promote the growth of fibrocartilage. The key is understanding that this procedure is specifically for cartilage repair in weight-bearing areas, not for other types of injuries.
Now, why is option C correct? The procedure works by drilling small holes into the subchondral bone, which allows stem cells and blood to form a clot that eventually becomes fibrocartilage. This is different from other procedures like arthroscopy for meniscal tears or ligament reconstruction. The mechanism involves the body's natural healing response to the microfractures.
For the incorrect options, let's consider what the other choices might be. Option A could be something like "Meniscal tear," which is treated with arthroscopic surgery, not microfracture. Option B might be "Osteoarthritis," which is a degenerative condition that doesn't involve focal defects. Option D could be "Ligament rupture," which would require different surgical techniques like ACL reconstruction. Each of these is a different pathology and thus the wrong answer.
The clinical pearl here is to remember that microfracture is for focal cartilage defects, not for diffuse conditions like osteoarthritis. It's important not to confuse it with other knee surgeries. Also, knowing the limitations of microfracture, such as the type of cartilage formed (fibrocartilage vs. hyaline cartilage), is key for exam questions.
**Core Concept**
Microfracture is a surgical technique used to treat **focal articular cartilage defects**, particularly in the knee. It stimulates the formation of fibrocartilage by creating small fractures in the subchondral bone to release marrow elements (stem cells, growth factors) into the defect.
**Why the Correct Answer is Right**
Microfracture targets **osteochondral defects** (damage to both cartilage and underlying bone). By drilling tiny holes (0.5–1 mm) in the subchondral bone, it induces a healing response: marrow-derived cells form a clot that matures into fibrocartilage, which, while less durable than native hyaline cartilage, improves function in weight-bearing joints. It is most effective for **young patients with isolated cartilage injuries**.
**Why Each Wrong Option is Incorrect**
**Option A:** *Meniscal tear* requires arthroscopic repair or resection, not microfracture.
**Option B:** *Osteoarthritis* involves diffuse cartilage degeneration; microfracture is not indicated for this chronic, widespread condition.
**Option D:** *Ligamentous injuries* (e.g., ACL tears) are managed with ligament reconstruction or grafting, not cartilage-based techniques.