0 Item(s)
Open Management of Femoroacetabular Impingement
Femoroacetabular impingement (FAI) is a disease spectrum consisting of an abnormal functional relationship between the proximal femur and the acetabulum. The two major morphology types of FAI are cam type and pincer type. Cam-type impingement occurs when an aspheric femoral head-neck junction enters the acetabulum during motion. Pincer-type impingement occurs when acetabular overcoverage (resulting from either increased acetabular depth or acetabular retroversion) leads to abnormal contact of the acetabular rim and the femoral neck. Both types are believed to contribute to hip arthrosis. Despite some controversy, approximately 80% of patients with FAI are generally thought to have a mixed type of impingement that includes elements of both cam and pincer impingement. In addition, extra-articular FAI patterns (anterior inferior iliac spine, greater trochanter, ischiofemoral) are recognized as potential sources of symptomatic FAI.