Know your Knee OA Stage: Your key to Healthier Joints
Knee osteoarthritis is a condition involving damage to the articular cartilage and the underlying subchondral bone, accompanied by an inflammatory response and a reduction in synovial fluid. This process does not happen overnight but progresses through several stages with varying symptoms and severity. Understanding each stage helps us implement appropriate interventions, slow the disease's progression, and improve quality of life.
Based on X-ray imaging, knee osteoarthritis is commonly classified into 5 main stages from 0 to 4, according to the Kellgren-Lawrence system.
Knee Condition: This is the ideal stage; the knee is completely normal. There are no signs of degeneration. The cartilage is intact, smooth, and ensures shock absorption and friction reduction.
Symptoms: The person experiences no pain or stiffness. Movement is entirely normal.
Management: Maintain a reasonable diet, exercise regimen, and weight for prevention.
Knee Condition: Very minor wear and tear appears on the cartilage surface. Small bone spurs (osteophytes) may begin to form at the edges of the joint but are often difficult to detect. The joint space remains normal.
Symptoms: The person barely notices any clear symptoms. There might be occasional slight stiffness or mild discomfort after a long day of activity, but it is insignificant.
Management: This is the golden period for prevention. It is necessary to:
Maintain a healthy weight.
Engage in low-impact exercises (swimming, cycling, yoga) to strengthen the muscles around the joint.
Supplement with nutrients beneficial for cartilage, such as Glucosamine, Chondroitin, and Collagen Type II.
Knee Condition: Cartilage damage becomes more evident, and the cartilage begins to thin. Small bone spurs can be seen on X-rays. The joint space begins to show slight narrowing.
Symptoms: The person starts to feel more noticeable pain, especially after long walks, climbing stairs, squatting, or prolonged standing. The joint may make a cracking or grating sound (crepitus) during movement. Morning stiffness or stiffness after sitting for long periods becomes more frequent.
Management:
Non-Pharmacological Treatment: Continue exercises to strengthen the quadriceps and hamstrings. Physical therapy may be prescribed.
Pharmacological Treatment: A doctor may prescribe common pain relievers (Paracetamol) or non-steroidal anti-inflammatory drugs (NSAIDs) when needed.
Injections: Hyaluronic acid injections (viscosupplementation) may be considered to supplement joint fluid.
Knee Condition: The cartilage wears down significantly, and the joint space narrows clearly. The subchondral bone begins to harden (sclerosis), and small bone cysts (geodes) may appear. Bone spurs are medium to large in size. Fluid accumulation in the joint (knee effusion) may occur due to inflammation.
Symptoms: Pain becomes frequent and apparent even during normal activities like walking or using stairs. The knee may swell, feel warm, and look red at times. Stiffness lasts longer, making it difficult to fully bend or straighten the leg. Movement can be significantly limited.
Management:
Medication: Use of pain relievers and anti-inflammatory drugs as prescribed by a doctor.
Physical Therapy: More intensive therapy to maintain range of motion and muscle strength.
Interventions: Corticosteroid injections may be used for rapid inflammation reduction, or Platelet-Rich Plasma (PRP) injections may be considered to support regeneration.
Surgery: May be considered if conservative measures fail, such as arthroscopic surgery to clean out the joint (debridement).
Knee Condition: This is the final and most severe stage. The cartilage is almost completely destroyed, causing the bone ends to rub directly against each other. The joint space is severely narrowed or absent. Bone spurs are very large, and the subchondral bone is deformed (sclerotic). The knee may become misaligned (bow-legged or knock-kneed).
Symptoms: Intense, constant pain, even at rest or at night. Severe stiffness, with an almost complete loss of knee movement. Walking is extremely difficult, often requiring a cane or walker. Thigh muscle atrophy may occur due to lack of use.
Management:
At this stage, conservative measures are largely ineffective.
Total knee replacement surgery is the optimal and most definitive treatment method. This surgery replaces the destroyed joint surfaces with artificial components made of metal and plastic, allowing the patient to be free from pain and regain mobility.
Knee osteoarthritis is a journey that cannot be reversed, but we can slow its progression. Early recognition of signs in Stages 1 and 2 for timely intervention is crucial. Always listen to your body, maintain a healthy lifestyle, and most importantly, consult an Orthopedic specialist for an accurate diagnosis and the most suitable treatment plan.
Khanh An Clinic is the leading medical provider of physiotherapy and treatment for patients with various musculoskeletal conditions. We are dedicated to helping patients restore their full body function and achieve lasting recovery.
