Trochlear dysplasia is an uncommon anatomical variation frequently associated with patella instability and patellar dislocation. In this condition, the normal femoral groove that guides the patella is shallow or irregular. Instead of a stable groove, a prominence or “bump” may be present, affecting normal patellar tracking.

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This structural difference often leads to sensations of kneecap instability, where the patella does not glide smoothly within the joint. Patients may experience apprehension, feelings of the patella shifting, or episodes of recurrent patella dislocation. In some cases, pain may also occur due to abnormal joint loading.

Many cases of mild trochlear dysplasia can be effectively managed with procedures designed to stabilise the patella, without the need for groove reconstruction. Surgical reshaping of the trochlea, known as trochleoplasty, is a highly specialised and complex procedure reserved for severe dysplasia and persistent instability.

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For individuals experiencing recurrent kneecap instability or patellar dislocation, consultation with a knee specialist in Melbourne is recommended.