Habitual dislocation of the patella is when the knee dislocates every time it is flexed (bent) and the patella does not re-locate until the knee is straightened again.

The patient has no control over the dislocation

Dislocation is usually to the lateral side. The patient is usually a child and has no control over the dislocating.

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obligatory dislocation

Dr Sheila Strover (Editor)
BSc (Hons), MB BCh, MBA

See biography...