CT evaluation of periacetabular osteotomies

We have previously described a simple and reproducible three-dimensional te chnique of CT for the measurement of the cover of the femoral head in aceta bular dysplasia in adults. We now describe the application of this techniqu e in ten patients with symptomatic dysplasia to assess the degree and direc tion of dysplasia and to measure the cover obtained at acetabular osteotomy . The indices obtained gave a useful indication of the degree and direction o f the dysplasia and confirmed which components had been used most efficient ly to achieve cover. The information is easily presented in graphical form and gives a clearer indication of the cover obtained than the indices deriv ed from plain radiographs.