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Sai Institute of Sports Injury

Patellar Instability

The kneecap is designed to fit in the center of this groove, and slide evenly within the groove during the knee movements. But due to biomechanical alterations , in some patients knee cap tends to slip outwards during the the knee movements.It is called patellar instability.


  • Kneecap (patella) moves to the outside of the knee
  • Anterior knee pain and tenderness
  • Hypermobile patella (you can move the kneecap excessively )
  • Apprehension +


  • Your symptoms plus a doctor's examination of the knee (Q-angle)
  • Special knee x-rays
  • MRI scan/CT scan



  • Physical Therapy
  • Bracing and straping


  • Medial soft tissue reconstruction surgeries (MPFL Reconstruction)      /Lateral soft tissue release Bony realignment surgeries.