Chondroplasty is a surgical procedure designed to repair damaged cartilage in joints, offering relief from pain and improved mobility for people dealing with cartilage injuries or degeneration.

Understanding How Cartilage Damage Is Treated Today

When cartilage in your joints becomes damaged or worn down, it can cause significant discomfort and limit your ability to move freely. The main goal of treating cartilage problems is to reduce pain, restore joint function, and slow down the breakdown of the joint surface. Treatment approaches depend on several factors, including how severe the damage is, where it’s located in the joint, your age, and how active you want to be in your daily life.^[3]

Cartilage is the smooth tissue that covers the ends of bones where they meet in a joint, allowing them to glide against each other with minimal friction. Because cartilage doesn’t have its own blood supply, it has very limited ability to heal itself once it’s injured. This means that medical intervention is often necessary to address the problem and prevent it from getting worse.^[3]

There are established surgical treatments that medical societies have approved for cartilage damage, and there is also ongoing research into new therapeutic approaches. Some patients benefit from procedures that smooth and stabilize damaged cartilage, while others may need more advanced techniques that stimulate the body’s natural repair processes. The choice of treatment is highly individual and depends on a careful evaluation by your orthopedic specialist.^[2]

Standard Treatment Options for Cartilage Damage

Before considering surgery, doctors typically recommend conservative treatments to manage symptoms. These non-surgical approaches include rest, pain-relieving medications, and anti-inflammatory drugs (medications that reduce swelling and pain). Physical therapy plays an important role, teaching you exercises that build strength in the muscles around the joint, improve flexibility, and increase your range of motion.^[4]

For patients experiencing severe pain that doesn’t respond to basic treatments, doctors may recommend hyaluronic acid injections. This substance is naturally found in healthy joints and acts as both a lubricant and shock absorber. When injected into the affected joint, it can provide pain relief for several months. Another option is viscosupplementation, which works similarly by adding fluid to the joint to improve its cushioning properties.^[4]

When conservative treatments fail to provide adequate relief, surgery becomes the next consideration. The most common surgical procedure for mild to moderate cartilage damage is chondroplasty. This procedure is typically performed using arthroscopy, a minimally invasive technique where a surgeon inserts a narrow tube with a camera (called an arthroscope) through small incisions around the joint.^[3]

During a chondroplasty, the surgeon uses specialized instruments to remove loose or frayed pieces of cartilage that may be causing pain and irritation. They then smooth the rough edges of the remaining cartilage to create a more even surface. An oscillating shaver with gentle suction is commonly used to carefully remove damaged tissue without harming healthy cartilage or exposing the underlying bone. In some cases, curved shavers are used to reach difficult areas, particularly when treating cartilage on the kneecap.^[2]

The procedure typically takes between 30 and 60 minutes and is usually performed on an outpatient basis, meaning you can go home the same day. The surgery is done under either general anesthesia (where you’re completely asleep) or regional anesthesia (which numbs only the affected area).^[4]

After making small incisions, the surgeon pumps sterile fluid into the joint to expand it and improve visibility. This fluid is drained out once the repair work is complete. The small incisions are then closed with stitches, leaving minimal scarring—typically just a few dime-sized marks.^[6]

For more severe cartilage damage where bare bone is exposed, a technique called microfracture may be performed instead of or in addition to basic chondroplasty. During this procedure, the surgeon creates multiple small holes in the bone at the site where cartilage is missing. These tiny holes allow blood and bone marrow cells, which are rich in growth factors, to seep into the area. Over time, this creates a blood clot that gradually develops into new cartilage, known as fibrocartilage. While fibrocartilage isn’t exactly the same as the original smooth cartilage (it’s slightly stiffer and doesn’t absorb shock quite as well), it’s still much better than having no cartilage at all.^[5]

Recovery After Chondroplasty

Recovery from chondroplasty is generally faster than from traditional open knee surgery because it’s performed through small incisions rather than one large opening. However, it’s still important to follow your surgeon’s instructions carefully during the healing period.^[6]

You may experience numbness immediately after surgery if a nerve block was used during the procedure. As this wears off, some pain is normal, and you’ll be given pain medications to help manage discomfort. Applying ice wrapped in a damp towel for 10 to 15 minutes every few hours can also help reduce pain and swelling. It’s important to keep your surgical dressings clean and dry during the initial healing period.^[5]

Many patients need to use crutches or other walking aids for the first few weeks after surgery. Your surgeon will tell you when it’s safe to put your full weight on the treated joint. Physical therapy usually begins soon after surgery and is crucial for rebuilding strength and range of motion. Most people can return to normal daily activities within three weeks, although returning to demanding physical activities or sports may take two to three months.^[3]

Driving is typically not allowed while you’re using crutches, which usually means waiting one to three weeks before getting behind the wheel again. The exact timeline depends on which joint was treated and how quickly you’re recovering.^[6]

Benefits and Risks of the Procedure

The potential benefits of chondroplasty include significant reduction in joint pain, improved joint function, and slowing of cartilage breakdown. Because it’s performed arthroscopically, patients experience faster recovery times and less visible scarring compared to traditional open surgery. Many people report immediate relief from symptoms like catching, locking, or grinding sensations in the joint. Additionally, if the surgeon discovers other problems during the arthroscopy, such as torn meniscus tissue, these can often be addressed during the same procedure.^[3]

While chondroplasty is generally safe, some patients experience minor side effects such as mild pain or small scars at the incision sites. As with any surgery, there are risks, though they are uncommon. These include infection, blood clots, or rarely, damage to surrounding structures in the joint.^[3]

Innovative Approaches Being Studied in Clinical Trials

While standard chondroplasty has helped many patients, researchers are continuously working to develop more advanced treatments for cartilage damage. One promising approach being tested is called Matrix-Induced Autologous Chondrocyte Implantation (MACI). This technique represents the third generation of cell-based cartilage repair methods.^[4]

MACI works by using a patient’s own cells to create new cartilage tissue. The process begins with an arthroscopic procedure where the surgeon collects a small sample of healthy cartilage from a non-weight-bearing area of the patient’s joint. This tissue is sent to a specialized laboratory that has been licensed by regulatory authorities. In the lab, technicians isolate the chondrocytes (the cells that produce cartilage) and cultivate them over several weeks until they multiply significantly.^[4]

The cultured chondrocytes are then placed onto a collagen membrane, creating a patch of living tissue. In a second surgical procedure, this membrane is implanted over the damaged area of the joint. Over time, these transplanted cells produce new cartilage that has properties similar to natural hyaline cartilage—the smooth, durable type of cartilage that normally covers joint surfaces. This is considered superior to the fibrocartilage that forms after microfracture procedures.^[4]

The MACI procedure is typically used to treat medium to large cartilage defects on specific areas of the knee, including the lateral femoral condyle (outer part of the thigh bone), medial femoral condyle (inner part of the thigh bone), the patella (kneecap), and the trochlea (the groove where the kneecap slides). However, researchers don’t yet know whether MACI is effective for joints other than the knee, or whether it’s safe and effective for patients over 55 years of age. These are areas where clinical trials continue to gather data.^[23]

Common side effects of MACI reported in clinical studies include joint pain, tendonitis (inflammation of tendons), back pain, joint swelling, and joint effusion (fluid buildup). More serious complications, though less common, can include ongoing joint pain, injury to the cartilage or meniscus during surgery, treatment failure, or progression to osteoarthritis.^[23]

Another experimental approach being evaluated is osteochondral allograft (OCA) transplantation. This technique is designed for medium to large cartilage defects (measuring 4 to 10 square centimeters) that also involve damage to the underlying bone. During an OCA procedure, surgeons implant healthy pieces of both cartilage and bone tissue that come from a donor (a person who has donated their tissue after death). This approach can be beneficial because it replaces both the damaged cartilage surface and the supporting bone structure beneath it.^[23]

However, OCA transplantation has some limitations. First, there’s a limited supply of suitable donor tissue, which means not all patients who could benefit from this procedure can receive it when they need it. Second, once donor tissue becomes available, surgeons have only 28 days to perform the transplantation before the tissue quality deteriorates. This short window can make scheduling challenging. Third, because the tissue comes from another person, there’s a small risk of disease transmission, although modern screening and processing techniques have made this extremely rare.^[23]

An alternative to using donor tissue is the osteochondral autograft (OATS) procedure. Instead of relying on tissue from another person, this technique uses the patient’s own cartilage and bone tissue. The surgeon harvests small cylindrical plugs of healthy cartilage and bone from non-weight-bearing areas of the patient’s own joint and transplants them into the damaged area. This approach eliminates concerns about tissue rejection or disease transmission. The OATS procedure is typically used for smaller defects, ranging from 1.5 to 4 square centimeters. The main limitation is that there’s only so much healthy tissue that can be safely harvested from other parts of the same joint without causing problems in those donor areas.^[23]

Researchers continue to refine these techniques and study their long-term outcomes in clinical trials. These studies typically progress through different phases. Phase I trials primarily focus on safety, testing the procedure in a small number of patients to identify potential risks. Phase II trials expand to more patients and begin evaluating effectiveness—whether the treatment actually improves symptoms and joint function. Phase III trials involve large numbers of patients and compare the new treatment directly against standard treatments to determine whether it offers significant advantages.^[23]

Clinical trials for cartilage repair treatments are being conducted in medical centers across North America, Europe, and other regions. Eligibility for these trials varies depending on the specific study but generally includes factors such as the size and location of the cartilage defect, the patient’s age, and whether they’ve had previous treatments. If you’re interested in learning about current clinical trials for cartilage damage, your orthopedic surgeon can provide information or refer you to specialized centers conducting this research.^[23]

Most common treatment methods

• Arthroscopic Chondroplasty
  • Minimally invasive procedure using a small camera and instruments inserted through tiny incisions to smooth damaged cartilage
  • Removes loose or frayed cartilage fragments and trims unstable cartilage flaps
  • Typically performed as outpatient surgery taking 30-60 minutes
  • Recovery usually allows return to normal activities within three weeks
• Microfracture Procedure
  • Used when cartilage damage is severe and bare bone is exposed
  • Surgeon creates multiple small holes in the bone to allow blood and bone marrow cells to enter the damaged area
  • Forms a blood clot that develops into fibrocartilage over time
  • Performed arthroscopically during the same procedure as chondroplasty
• Matrix-Induced Autologous Chondrocyte Implantation (MACI)
  • Two-stage procedure using patient’s own cartilage cells
  • First stage involves collecting a cartilage sample that is sent to a laboratory for cell cultivation
  • Second stage implants the cultured cells on a collagen membrane over the damaged area
  • Creates repair tissue with properties similar to natural hyaline cartilage
• Osteochondral Transplantation
  • Osteochondral allograft uses donor tissue for medium to large defects with bone involvement
  • Osteochondral autograft (OATS) uses patient’s own tissue from non-weight-bearing areas
  • Replaces both damaged cartilage surface and underlying bone structure
  • Typically used for defects ranging from 1.5 to 10 square centimeters depending on type
• Conservative Non-Surgical Management
  • Pain-relieving and anti-inflammatory medications
  • Physical therapy to strengthen muscles and improve joint flexibility
  • Hyaluronic acid injections to provide lubrication and shock absorption
  • Rest and activity modification to reduce stress on the damaged joint