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6 per 100,000 per year [4] A patellar dislocation is a knee injury in which the patella (kneecap) slips out of its normal position. [5] Often the knee is partly bent, painful and swollen. [1][2] The patella is also often felt and seen out of place. [1] Complications may include a patella fracture or arthritis. [3]
Relatively common [2] Patellofemoral pain syndrome (PFPS; not to be confused with jumper's knee) is knee pain as a result of problems between the kneecap and the femur. [4] The pain is generally in the front of the knee and comes on gradually. [2][4] Pain may worsen with sitting down with a bent knee for long periods of time, excessive use, or ...
Patellar subluxation can be caused by osseous abnormalities, such as incorrect articulation of the femoral groove with the patella, trochlear dysplasia, or patella alta, which is a distance of greater than 20 mm between the tibial tubercle and the trochlear groove. It can also result from soft-tissue abnormalities, such as a torn medial ...
Patellar tendonitis is inflammation of the patellar tendon. A physical therapist shares the 5 best exercises to help relieve patellar tendonitis pain.
Function. The purpose of the MPFL is to keep the patella stabilized; the ligament itself is responsible for 50–80% of the stability that is needed to prevent lateral patellar dislocation. [2] The ligament is able to gain this stability by keeping the patella stable in the trochlear groove. The addition of two other ligaments: the medial ...
A traumatic dislocation of the tibiotarsal joint of the ankle with distal fibular fracture. Open arrow marks the tibia and the closed arrow marks the talus. A joint dislocation, also called luxation, occurs when there is an abnormal separation in the joint, where two or more bones meet. [1] A partial dislocation is referred to as a subluxation.
Patellar tendinitis, also known as jumper's knee, is an overuse injury of the tendon that straightens the knee. [1] Symptoms include pain in the front of the knee. [1] Typically the pain and tenderness is at the lower part of the kneecap, though the upper part may also be affected. [2] Generally there is no pain when the person is at rest. [2]
A knee dislocation is an injury in which there is disruption of the knee joint between the tibia and the femur. [3][4] Symptoms include pain and instability of the knee. [2] Complications may include injury to an artery, most commonly the popliteal artery behind the knee, or compartment syndrome. [3][4][7] About half of cases are the result of ...