Firstly, a knee joint dislocation occurs when the position of the thighbone relative to the shinbone becomes disrupted at the knee joint. Certainly, it can happen through trauma to your leg, like from falls, sports injuries, and car accidents.
Secondly, there is a difference between knee joint dislocation and kneecap dislocation. If your knee is dislocated, your thigh and shin bones may be completely or partially out of place. However, a kneecap dislocation is when your kneecap (patella) slips out from the patella-femoral groove. Doctors have been known to sometimes call this a patellar subluxation.
Thirdly, it’s commonly understood a dislocated knee will always cause severe pain in the knee. Additionally, the knee will look deformed and there will be no feeling below the knee. If the knee relocates, it will become swollen from fluid in the knee and be painful with any movement.
Fourthly, some have require extensive physical therapy to recover from a knee dislocation. The recovery time depends on the needed treatment and any factors that are found to show service could reoccur. Research suggests that a first-time dislocation of the kneecap can take at least 6 weeks to heal.