We measured the patellar tilt and patellar shift in recurrent dislocation of the patella and postoperatively using computed tomography with full extension of the knee.
Patellar tilt and patellar shift were improved significantly after operation.
Three methods have been used for operating on recurrent dislocation of the patella: A, arthroplasty of which uses soft tissue, for example, the Baker method or the Kouno method; B, medial displacement of tibial tuberosity, for example, the Elmslie-Trillat method or the Groeneveld method; and C, only lateral retinacular release and medial plication. Comparing A, B and C, patellar tilt and patellar shift were improved significantly in A and B but not significantly in C. We have concluded that measurement of the patellar tilt and patellar shift using computed tomography with full extension of the knee is useful for postoperative evalution of recurrent dislocation of the patella.
