Osteochondritis dissecans Or Avasular necrosis Knee

It is a condition where it breaks the articular cartilage and the underlying subchondral bone.

Symptoms –

• Pain
• Swelling
• Locking of knee joint
• Restricted movement
• Crackling noise

Causes

• The subchondral bone dies due to decreased blood supply to the subchondral bone and results in Avascular Necrosis of the bone.
• This results in fragmentation ( Bone pieces or dissection ) of both cartilage and bone and forms loose bodies in the joint which further damages the knee joint.

Investigation

1. X-ray
2. MRI Scan

Treatment

• Non-surgical treatment is rarely an option.
  • If advised also protected or non-weight bearing walk and immobilization.
• Surgical treatment –
  • Arthroscopic drilling of intact lesions
  • Fixation of cartilage flap lesions with pins or screws,
  • PRP or Stem Cell therapy
• If all the above treatment fails then Knee replacement.

Post surgery care

Two-stage process –

1. Immobilization
   2. Rehab program

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