When the kneecap falls out of the trochlear groove, knee pain and a variety of different patellofemoral injuries can occur. Especially in young and active patients, patellofemoral instability is a very common issue. This problem is initially treated conservatively after the first dislocation, but after issues persist surgery becomes more common. The outlook for knee stabilization surgery is around six to nine months.

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"Knock Kneed" Posture

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Chronic patellofemoral instability is another issue that is more common in female than male athletes. Like in ACL injuries, “knock kneed” posture is a risk factor which leads to these injuries more commonly occurring in women, especially after puberty.