"Knee Locking" or "Locked Knee" is the term used to describe a painful condition that occurs as result of knee extension at certain angle. During extension of knee joint, extension is restricted at 10 to 30 degree to prevent pain. Patient is unable to achieve optimum normal extension. Any further extension beyond the restricted angle causes severe intractable knee pain. There are a number of conditions that may cause knee locking and it's a condition you should discuss with your doctor.
Cartilage fragments can get caught in the joint.
A "Bucket Handle" or "Meniscus Tear" can cause restriction of knee joint extension.
Fracture of Tibia or Fibula at knee joint can cause knee locking or locked knee joint.
Osteoarthritis and natural aging can increase the risk for knee locking up.
Ligament Injury can cause instability sometimes referred to as trick knee.
Inflammation and swelling can restrict extension leading to muscle spasms.
Patellar dislocation causes restriction of knee joint and severe pain with extension.
Knee joint synovitis causes severe pain and restricted extension of knee joint.
Knee joint cartilage that is completely worn out restricts movements of knee joint and causes severe pain along with locked knee.
An Xray and/or an MRI can help the doctor determine the cause of the knee locking. These tests will show the meniscus wear, the health of the ligaments, any dislocation of the patella and the health of the knee joint.
Treatment for Knee Locking or Locked Knee
NSAIDs - Anti-inflammatory meds are prescribed for inflammation, pain and fever
Muscle Relaxants are sometimes prescribed to ease knee pain, reduce knee stiffness and relax muscles.
Heat and Cold Application.
Physical Therapy for Locking Knee - PT is directed towards exercise, stretching, massage and knee manipulations.
Surgery of Locking Knee or Locked Knee may include removing loose fragments of cartilage or soft tissue. It may be necessary to surgically remove all parts of the torn meniscus, but in some cases the cartilage can be repaired. Some severe cases may require knee replacement. Dr. Reddick can help you decide the best course of action.
KNEE LOCKING: WHAT IS THE CAUSE & TREATMENT?
