Knee dislocation is a rare but serious injury
By: Dr. Rick Cunningham
He is a knee and shoulder sports medicine specialist with Vail-Summit Orthopaedics
and a physician for the U.S. Ski Team and president of Vail-Summit Orthopaedics.
Knee dislocations are a rare but very serious injury. In a knee dislocation, the hinge joint of the knee, made up of the thighbone (femur) articulating on the shinbone (tibia), is disrupted. In order for the knee joint to dislocate, at least two major ligaments must tear, and more often, three or four of the primary stabilizing ligaments of the knee tear.
Athletes who dislocate their knee will ultimately require surgery to repair the damaged ligaments, tendons and/or cartilage. However, this surgery is typically done in a delayed and staged fashion.
If certain tendons or cartilages are torn, then these are repaired first. The knee is then rehabilitated to allow for swelling to go down and to restore range of motion to the joint. Ligament tears to the anterior cruciate ligament (ACL), posterior cruciate ligament (PCL), lateral collateral ligament (LCL) and/or medial collateral ligament (MCL) are typically repaired secondarily.
Knee dislocations are very serious injuries that occur in athletes and others. They require urgent care and treatment in order to prevent serious complications.
Ask a Vail Sports Doc column: Knee dislocation is a rare but serious injury
Just to point out, this is NOT the same injury as what Haula described as "a dislocated patella".
The patella is the kneecap, which slides out of the socket created by the ligaments. Very painful to slide out, very painful when it pops back into place, and lots of swelling and recovery. And yes, this can strain the ligaments and tendons around the patella.
Dislocated knee involves the entire joint coming apart as the above post describes.
Based on his recovery and return, I'd guess a dislocated patella. But based on this Athletic article and this quote:
Haula said the surgeon who eventually operated on his knee is a sports knee specialist but had seen the injury in hockey only one other time.
it could have been a knee dislocation. If that was the injury, I'm surprised he's already playing. I saw it happen to CJ Leak at Wake Forest, and he took almost 2 full seasons to return to playing football, but was never the same player again.