Patellar instability can be classified into four types based on patellar movement with knee flexion: a three-dimensional computer model analysis - ScienceDirect

6 Alteration of lower limb and patellar instability. (a) Normal limb

PDF) A dynamic multibody model of the physiological knee to predict internal loads during movement in gravitational field

Anatomy and Biomechanics of Patellar Instability - ScienceDirect

Patella tracking calculation from patellofemoral positions at finite angles of knee flexion - ScienceDirect

Osteotomies About the Knee: Managing Rotational Deformities - ScienceDirect

A new classification system of patellar instability and patellar maltracking

Classification of patella instability and maltracking. The grading is

PDF) Effect of Patellar Thickness on Knee Flexion in Total Knee Arthroplasty: A Biomechanical and Experimental Study

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Patellar shift ratio (PSR) is the optimal measurement for characterising lateral patellar shift and a reliable predictor of recurrent patellar dislocation

Patellofemoral instability after total knee arthroplasty

Classification of dysplasia of the femoral trochlea in patients with patellar instability depends on the evaluation plane - ScienceDirect