| Popis: |
Following the occurrence and healing of Legg-Calve-Perthes (LCP) in childhood, residual hip joint deformity of variable severity can occur, which is characterized by morphological features of both femoral acetabular impingement (FAI) and variable secondary relative acetabular deficiency. The femoral head is enlarged and aspherical and characteristically pathologically impinges against the acetabulum in hip flexion, in internal rotation in flexion and abduction. It also typically impinges in adduction. The femoral neck is relatively short, the greater trochanter high riding resulting in a functional coxa vara. The high-riding trochanter also potentiates both abductor insufficiency and extra-articular impingement. Secondarily, the acetabulum variably remodels in response to its long-standing articulation with a post-Perthes enlarged aspherical femoral head. If the acetabulum is dysplastic, both femoral head instability and labral-chondral rim overload can occur. |
