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Cartilage Damage – Causes, Symptoms & Treatment

Cartilage damage refers to the deterioration or injury of articular cartilage, often caused by wear, trauma, or inflammation. It can lead to joint pain, stiffness, and reduced mobility.

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Things worth knowing about "Cartilage Damage"

Cartilage damage refers to the deterioration or injury of articular cartilage, often caused by wear, trauma, or inflammation. It can lead to joint pain, stiffness, and reduced mobility.

What Is Cartilage Damage?

Cartilage damage describes the deterioration or destruction of articular cartilage – the smooth, elastic tissue that covers the ends of bones within a joint. Cartilage acts as a shock absorber and allows nearly frictionless movement. When it becomes damaged, significant pain and functional limitations can result.

Cartilage damage can affect any joint, but it most commonly occurs in the knee, hip, shoulder, and ankle. Because cartilage lacks blood vessels, its natural ability to heal and regenerate is very limited.

Causes

Cartilage damage can arise from a variety of factors:

Mechanical wear and tear: Prolonged physical strain over many years, especially in physically demanding occupations or high-impact sports.
Acute injuries: Falls, sports accidents, or direct impacts to a joint can cause sudden cartilage damage.
Osteoarthritis: The most common degenerative joint disease, in which cartilage is progressively broken down.
Inflammatory joint diseases: Conditions such as rheumatoid arthritis can destroy cartilage through chronic inflammation.
Malalignment: For example, bow legs or knock-knees, which cause uneven pressure distribution within the joint.
Obesity: Excess body weight increases pressure on the joints and accelerates cartilage breakdown.
Genetic predisposition: A family history of joint disease may increase the risk of cartilage damage.

Symptoms

The symptoms of cartilage damage can vary depending on the severity. Common signs include:

Joint pain that initially occurs only with activity, but may later also arise at rest
Morning stiffness or stiffness after prolonged periods of sitting
Clicking, grinding, or crunching sounds (crepitus) when moving the joint
Swelling and fluid accumulation (effusion) in the joint
Restricted range of motion and reduced strength
Feelings of joint instability

Diagnosis

Several methods are used to diagnose cartilage damage:

Physical examination: The doctor assesses joint mobility, stability, and areas of tenderness.
X-ray: Reveals signs of wear and joint space narrowing, but does not directly visualize cartilage.
Magnetic Resonance Imaging (MRI): The gold standard for imaging cartilage damage, providing detailed information on the extent and location of the defect.
Arthroscopy: A minimally invasive procedure that can serve both diagnostic and therapeutic purposes.
Ultrasound: Can detect joint effusions and superficial changes.

Grading of Cartilage Damage

Cartilage defects are commonly classified using the ICRS grading system (International Cartilage Repair Society):

Grade 1: Superficial fissures or softening of the cartilage
Grade 2: Defects extending up to half the cartilage thickness
Grade 3: Defects extending more than half the cartilage thickness, approaching the bone
Grade 4: Full-thickness cartilage loss with exposed bone (bone-on-bone contact)

Treatment

Conservative Treatment

Mild to moderate cartilage damage is typically managed with non-surgical approaches first:

Physiotherapy: Targeted exercises to strengthen the muscles supporting the joint and reduce load on the cartilage.
Pain management: Non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or diclofenac to relieve pain and reduce inflammation.
Hyaluronic acid injections: Direct injection into the joint to improve lubrication and cushioning.
Corticosteroid injections: For short-term reduction of inflammation and pain.
Weight management: Reducing body weight to decrease mechanical stress on the joints.
Assistive devices: Insoles, orthoses, or crutches to offload the affected joint.

Surgical Treatment

More severe or treatment-resistant cartilage damage may require surgical intervention:

Microfracture: Small perforations are made in the underlying bone to stimulate the formation of fibrocartilage repair tissue.
Autologous Chondrocyte Implantation (ACI): The patient's own cartilage cells are harvested, expanded in a laboratory, and then implanted into the defect.
Osteochondral Autograft Transfer (OATS): Healthy cartilage-bone cylinders are transplanted from a low-load-bearing area to the damaged site.
Joint replacement (endoprosthesis): In advanced arthritis, an artificial joint may be implanted.

Prevention

Several measures can help prevent cartilage damage or slow its progression:

Regular, low-impact exercise (e.g., swimming, cycling)
Maintaining a healthy body weight
Wearing protective gear during sports
Correcting joint malalignment
A balanced diet rich in nutrients such as vitamin C, omega-3 fatty acids, and collagen precursors

References

Brittberg M. et al. - ICRS Clinical Cartilage Grading Chart. International Cartilage Repair Society (2003).
Buckwalter J.A., Mankin H.J. - Articular cartilage: Tissue design and chondrocyte-matrix interactions. Journal of Bone and Joint Surgery (1997).
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) - Osteoarthritis. U.S. Department of Health and Human Services (2023).

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