Microfracture surgery is a cartilage repair procedure used to treat selected focal articular cartilage defects, most often in the knee. In simple language, the surgeon cleans the damaged cartilage area and makes very small holes in the bone underneath. This allows bone marrow elements to come into the defect and form a repair clot, which can help cover the damaged area with repair tissue over time. [1][2]
In my practice, I usually explain to patients that microfracture surgery is not a general treatment for every kind of knee pain or every type of arthritis. It is mainly considered for specific cartilage defects in properly selected patients. For the right patient, it may reduce pain and improve function. But it also has limitations, and the rehabilitation after surgery is extremely important. [1][3]
For Bangladeshi patients and families, the biggest confusion is often this: “If my MRI says cartilage damage, does that mean I need microfracture surgery?” The answer depends on the size, depth, location, symptoms, alignment, stability, age, activity level, and overall condition of the knee. The name of the procedure alone is not enough to decide treatment.
What Is Microfracture Surgery?
Microfracture is a bone marrow stimulation technique. The goal is not to transplant cartilage from somewhere else, but to create an environment where the body can form repair tissue over the damaged area. During the procedure, the damaged cartilage edges are prepared, and small holes are made in the underlying bone so marrow cells can enter the defect and begin the repair process. [1][2][4]
This repair tissue is not identical to normal native articular cartilage. That is one reason patient selection and realistic expectations matter. [1][3]
What Kind of Problem Is It Used For?
Microfracture is mainly used for symptomatic focal cartilage lesions, often in the knee. These are localized areas of cartilage loss rather than advanced, widespread arthritis affecting the whole joint. [1][2]
Conditions where it may be considered
- Focal full-thickness cartilage defects
- Some cartilage injuries after trauma
- Selected osteochondral lesions
- Some cases related to osteochondritis dissecans
- Carefully selected smaller lesions in lower-demand patients [1][2][3]
One important point I want Bangladeshi patients to understand is that microfracture is not the same as treatment for severe, generalized osteoarthritis. A knee with diffuse advanced arthritis is a different problem and usually needs a different treatment pathway. [1][5]
Which Joint Is Most Commonly Treated?
When most patients ask about microfracture surgery, they are asking about the knee. That is where it is most commonly discussed in cartilage restoration practice. However, similar principles may also be used in selected lesions of other joints.
In this article, I am focusing mainly on knee microfracture, because that is the most relevant and practical context for most patients in Dhaka and Bangladesh.
Who May Be a Suitable Candidate?
Microfracture surgery works best in selected patients, not in everyone with cartilage damage.
Patients who may be considered
- Younger or middle-aged patients
- People with a small focal cartilage defect
- Patients with persistent symptoms despite non-surgical treatment
- Those with reasonably good knee alignment and stability
- Patients who can follow a strict rehabilitation protocol [1][2][3]
I usually explain to my patients that the knee environment matters a lot. If there is untreated malalignment, major instability, large meniscal loss, or widespread arthritis, microfracture alone may not give the result a patient hopes for.
Who May Not Be a Good Candidate?
Microfracture may be less suitable in:
- Large cartilage defects
- Diffuse degenerative arthritis
- High-demand athletes with certain larger lesions
- Significant malalignment
- Major untreated ligament instability
- Patients unable to comply with rehabilitation [1][3][6]
Recent evidence also suggests that microfracture has limited long-term efficacy for medium to large knee chondral defects, which is an important point when discussing expectations and alternatives. [6]
What Symptoms Can a Cartilage Defect Cause?
Patients with a focal cartilage lesion may have:
- Knee pain with walking, stairs, squatting, or sports
- Swelling after activity
- Catching or mechanical discomfort
- Difficulty running or pivoting
- Reduced sports performance
- Pain that continues despite rest or simple treatment
The symptoms are not unique to cartilage defects, which is why proper evaluation is necessary. Meniscus tears, ligament problems, osteoarthritis, or patellofemoral disorders can also produce overlapping symptoms.
How I Evaluate a Patient Before Recommending Microfracture
When I consider microfracture surgery, I do not focus only on the MRI report. I look at the whole knee and the whole patient.
Important parts of evaluation
- History of injury and symptoms
- Physical examination
- Exact location and size of the defect
- Knee alignment
- Ligament stability
- Meniscal status
- Activity goals
- X-rays and MRI [1][2][3]
In my practice, I often explain that a cartilage procedure is more likely to work when the rest of the knee mechanics are favorable. If the knee has several unresolved structural problems, simply doing microfracture may not be enough.
How Is the Surgery Done?
Microfracture is usually performed arthroscopically. A camera is inserted into the joint through small incisions, and the surgeon identifies the cartilage defect.
Basic surgical steps
- Unstable damaged cartilage is cleaned from the defect
- The edges are shaped to create a stable border
- Tiny holes are made in the subchondral bone
- Marrow elements bleed into the defect and form a clot [2][4]
That clot is an important part of the repair process. Protecting it during rehabilitation is one reason postoperative instructions are so important.
What Are the Advantages of Microfracture Surgery?
Potential advantages
- Arthroscopic and relatively less invasive
- Does not require cartilage harvesting from another site
- May improve symptoms in selected small focal defects
- Can be an option in carefully selected patients early in the cartilage treatment pathway [1][2]
