The concept of lateral retinacular lengthening where the two layers of the lateral retinaculum are cut at different levels, and loosened and then reattached..
Proximal realignment procedures
These include -
Extensor mechanism realignment procedures in the treatment of patellofemoral instability. Momoli A, Modena M and Giaretta S. Joints. 2013 Apr-Jun; 1(2): 21–26.