What about patella instability?

General patella outward dislocation more than two times, or when pushing patella laterally there is fear of dislocation, indicating the existence of patella instability. Should examine the causes of patella instability, common patella high, trochlear development abnormalities, trochlear and tibial tuberosity distance is too large, etc. After X-ray and MRI examination, determine the cause of specific damage, targeted treatment, divided into soft tissue surgery and femoral diameter surgery two categories. Soft tissue surgery, mainly for medial patellar retinaculum reconstruction, lateral retinaculum release for fixed lateral dislocation, patellar elevation or patellar trochlea, tibial tuberosity too far apart, tibial tuberosity knot bone, inferior and medial ectopic, trochlea deformity inflammation, no patellar track history, trochlea shaping.